ChatGPT answers, unedited

If you're an agency managing creative testing + versioning across multiple clients, I’d frame the choice around whether your primary problem is testing or production/ops.

My shortlist

What I'd choose

For most serious multi-client agencies: start with Smartly. Its agency offering is explicitly designed around multiple accounts, and it combines creative production, versioning, testing, media activation, reporting, and permissions rather than making you stitch together separate tools. Smartly says its platform supports personalized variations, automated testing, cross-channel trafficking, and agency workflows. Smartly Smartly

smartly.io

Choose Marpipe instead if the differentiator you're selling clients is "we scientifically test creative and tell you exactly which elements drive performance." Its core workflow is multivariate testing: you can vary headlines, images, layouts, etc., and get element-level performance data rather than simply seeing which finished ad won. Marpipe Marpipe

marpipe.com

Choose Celtra if your biggest headache is creative operations—taking approved concepts and generating huge numbers of correctly formatted, localized, on-brand versions across clients, markets and placements. Celtra is increasingly connecting that production layer with creative intelligence and performance data. Celtra Celtra

celtra.com

The important distinction

I'd actually avoid choosing based on the phrase "creative testing platform." For an agency, you need to decide whether you are building:

A. A creative operating system

Client → brief → concept → template → variants → approvals → trafficking → performance → iteration

or

B. A creative experimentation engine

Client → hypothesis → creative variables → controlled test → element-level results → next hypothesis

Smartly is closer to A. Marpipe is closer to B. Celtra is particularly strong around the production/versioning portion of A.

If you're trying to build an agency-wide system where 10–100 clients each have their own brands, templates, users, approval processes, asset libraries, testing history, and reporting, I'd lean toward Smartly vs. Celtra, with Marpipe potentially sitting alongside it if rigorous multivariate testing is a major part of your client proposition.

One caveat: Smartly is positioned at enterprise scale, and pricing is custom; its own site describes flexible pricing based on platform, scale, serving, and add-ons. Celtra

If you tell me roughly (1) number of clients, (2) monthly ad volume per client, (3) Meta-only vs Meta/TikTok/Google/etc., and (4) whether you need the platform to actually generate/version creatives or just manage tests, I can narrow this to a specific architecture and shortlist 2–3 platforms.

If the core requirement is “an agency-level system to create, version, test, learn from, and scale ad creative across many clients”, I’d narrow the shortlist to Smartly, Celtra, and Marpipe.

My take

If you're an agency, I'd start with Smartly

smartly.io is particularly aligned with your use case because it explicitly supports agency teams managing multiple accounts, with creative production, versioning, approvals, campaign management, and performance insights in one environment. Smartly Smartly

The interesting part for an agency is the creative operating system rather than simply an AI ad generator:

• Build a master creative/template.
• Generate dozens or hundreds of variants.
• Maintain brand/client-specific rules.
• Version creative without creating a mess of files.
• Push variants into campaigns.
• Analyze which creative elements are working.
• Feed those learnings into subsequent iterations.
• Manage this across multiple client accounts. Smartly Smartly

That's much closer to an agency creative infrastructure layer than a standalone "make me some ads with AI" product.

When I'd choose Celtra instead

celtra.com makes more sense if you're building a larger enterprise-grade creative production operation, particularly if you have sophisticated brand governance, many formats/channels, programmatic/CTV, localization, and complex modular creative requirements.

Celtra now positions its platform around the entire creative lifecycle: production, review, approval, activation, testing, and creative intelligence, with 100+ integrations. Celtra Celtra

The tradeoff is that Celtra is very enterprise-oriented and uses customized pricing rather than a simple self-serve model. Celtra

When I'd choose Marpipe

marpipe.com is particularly interesting if testing itself is the centerpiece of your agency offering.

Its approach is different: rather than merely telling you that Ad A beat Ad B, Marpipe is designed around multivariate testing of individual creative elements—headlines, images, CTAs, layouts, etc.—so you can build a database of what actually drives performance for each client. Marpipe Marpipe

It also has a specific agency partner program, including multi-client agency workflows and flat-rate pricing rather than charging a percentage of ad spend. Marpipe

So I'd think about it this way:

Smartly = agency creative operating system
Celtra = enterprise creative production infrastructure
Marpipe = creative experimentation/intelligence engine

What I'd actually build for an agency

If you're serious about this becoming a repeatable service across 10, 50, or 100+ clients, I wouldn't evaluate these platforms primarily on "how many AI ads can it generate?"

I'd score them on:

1. Client isolation — separate brands, assets, permissions, reporting.
2. Master → variant architecture — one concept producing many controlled versions.
3. Version history — know exactly what changed between V1, V2, V3.
4. Testing methodology — distinguish creative concepts from individual variables.
5. Cross-client learnings — while keeping client data appropriately isolated.
6. Performance ingestion — Meta, Google, TikTok, etc.
7. Automated iteration — winner → new variants.
8. Approval workflow — strategist → creative → client → media buyer.
9. Reporting — turn creative testing into something you can show clients.
10. API/exportability — avoid making your agency completely captive to the platform.

If you tell me roughly how your agency operates — e.g. number of clients, monthly ad spend, Meta-only vs Meta/Google/TikTok, static vs video, and whether you want the platform to actually launch ads or just manage creative/testing — I can narrow this to a specific stack and architecture.

Celtra now positions its platform around the entire creative lifecycle: production, review, approval, activation, testing, and creative intelligence, with 100+ integrations. Celtra Celtra

The tradeoff is that Celtra is very enterprise-oriented and uses customized pricing rather than a simple self-serve model. Celtra

When I'd choose Marpipe

marpipe.com is particularly interesting if testing itself is the centerpiece of your agency offering.

Its approach is different: rather than merely telling you that Ad A beat Ad B, Marpipe is designed around multivariate testing of individual creative elements—headlines, images, CTAs, layouts, etc.—so you can build a database of what actually drives performance for each client. marpipe.com marpipe.com

It also has a specific agency partner program, including multi-client agency workflows and flat-rate pricing rather than charging a percentage of ad spend.

So I'd think about it this way:

Smartly = agency creative operating system
Celtra = enterprise creative production infrastructure
Marpipe = creative experimentation/intelligence engine

What I'd actually build for an agency

If your problem is agency-level creative testing + versioning across multiple clients, I’d frame the decision around whether you primarily need (a) a creative operating system or (b) a testing/learning system.

My shortlist

Smartly has specifically incorporated Ad-Lib's creative-automation technology into its Creative Suite, including capabilities for agencies to scale production and personalize ads. ad-lib.io Celtra positions itself as creative-first, while Smartly emphasizes the connection between creative production and media execution. Celtra Bannerflow is another option worth considering if the core requirement is producing large numbers of format/language/channel variants from master assets. Bannerflow

For an agency, I'd lean Smartly or Celtra

If you're saying:

"We have 10–100 clients, each with multiple brands/campaigns, and we need to create 50–500 variants, maintain brand rules, launch them, and understand which creative components are working."

I'd put Smartly and Celtra through a serious RFP.

The reason is that your problem isn't simply "which ad won?" It's the entire loop:

brief → master creative → variants → approvals → publishing → testing → learnings → next iteration

Smartly is particularly interesting if your agency also owns media buying because its platform connects creative production with campaign execution and optimization across channels. Celtra ad-lib.io

Where Marpipe becomes interesting

If your agency's differentiator is creative strategy/testing, rather than production, I'd look hard at Marpipe.

Its fundamental approach is different: assemble combinations of creative variables and measure them systematically rather than simply comparing finished ads. That's useful when you want to tell a client:

"UGC wasn't the reason this ad worked. This particular hook + product angle + proof point combination was."

That's much more valuable than simply saying "Ad #17 had the lowest CPA."

But Marpipe is primarily a testing/intelligence layer, so you still need a good creative production/versioning workflow around it. adlibrary.com

The architecture I'd consider

For a serious agency, I'd actually think about the stack as:

DAM / asset library
↓
Creative production + versioning — Smartly / Celtra
↓
Structured experimentation — Marpipe or native platform testing
↓
Media platforms — Meta / TikTok / Google etc.
↓
Creative intelligence / reporting
↓
Client-specific learnings → next briefs

That distinction matters because creative automation and creative intelligence aren't the same problem. Automation produces variants; intelligence should turn performance data into reusable knowledge. Bannerflow

One important agency-specific requirement

Don't evaluate these platforms on the demo's "make 1,000 ads with AI" feature.

I'd make every vendor demonstrate this exact workflow:

1. Create Client A and Client B with completely different brand rules.
2. Upload one master creative for each.
3. Generate 30–100 controlled variations.
4. Have different approval workflows for each client.
5. Push variants to Meta/TikTok.
6. Tag every variant by hook, offer, format, visual, CTA, creator, audience, etc.
7. Pull performance back.
8. Identify which variables worked.
9. Turn those findings into the next creative brief.
10. Show me what a client-facing report looks like.

That will expose the difference between a genuine agency creative operating system and an impressive ad-generator demo.

If you tell me roughly how many clients you manage, monthly ad spend, which channels (Meta/TikTok/Google/etc.), and whether you're trying to replace an existing DAM/project-management system, I can narrow this to 2–3 platforms and give you a concrete architecture + estimated cost model.

If you're saying:

"We have 10–100 clients, each with multiple brands/campaigns, and we need to create 50–500 variants, maintain brand rules, launch them, and understand which creative components are working."

I'd put Smartly and Celtra through a serious RFP.

The reason is that your problem isn't simply "which ad won?" It's the entire loop:

brief → master creative → variants → approvals → publishing → testing → learnings → next iteration

Smartly is particularly interesting if your agency also owns media buying because its platform connects creative production with campaign execution and optimization across channels. Celtra ad-lib.io

Where Marpipe becomes interesting

If your agency's differentiator is creative strategy/testing, rather than production, I'd look hard at Marpipe.

Its fundamental approach is different: assemble combinations of creative variables and measure them systematically rather than simply comparing finished ads. That's useful when you want to tell a client:

"UGC wasn't the reason this ad worked. This particular hook + product angle + proof point combination was."

That's much more valuable than simply saying "Ad #17 had the lowest CPA."

But Marpipe is primarily a testing/intelligence layer, so you still need a good creative production/versioning workflow around it. adlibrary.com

The architecture I'd consider

For a serious agency, I'd actually think about the stack as:

DAM / asset library
↓
Creative production + versioning — Smartly / Celtra
↓
Structured experimentation — Marpipe or native platform testing
↓
Media platforms — Meta / TikTok / Google etc.
↓
Creative intelligence / reporting
↓
Client-specific learnings → next briefs

That distinction matters because creative automation and creative intelligence aren't the same problem. Automation produces variants; intelligence should turn performance data into reusable knowledge.

One important agency-specific requirement

For an agency-level ad creative testing + versioning system across multiple clients, I would not choose a single “ad testing tool” first. You need a stack that handles:

1. Client separation / permissions
2. Creative version control
3. Variant generation
4. Test design + winner analysis
5. Client reporting

The right choice depends on your agency size and volume.

My shortlist

adlibrary.com NewForm## If I were choosing for a performance marketing agency

Small–mid agency (5–50 clients)

I would build around:

• Creative repository/versioning: Bynder, Air, or Frame.io
• Creative intelligence/testing: Motion
• Testing framework: Meta Ads Manager experiments + your own naming conventions

This gives you a clean “client → campaign → concept → variant → result” history.

High-volume paid social agency ($250k+/month client spend)

I would look hardest at:

• Marpipe for structured creative experimentation
• Motion for analysis
• A DAM for asset/version management

Marpipe-style systems are strongest when you are testing many combinations and need statistically cleaner creative decisions. adlibrary.com NewForm

Creative production-heavy agency

If your bottleneck is “we need 50 variants per client per month,” consider adding an AI production layer such as AdFargo or ngram, which are positioned around agency creative generation workflows and client separation. Ad.Fargo ngram

The workflow I would implement

Client workspace
→ Brand kit
→ Approved assets
→ Past winners
→ Past losers

Creative object

Client: Nike
Campaign: Back-to-school
Concept: "Comfort angle"
Version family: V1

V1A: Female UGC hook
V1B: Male UGC hook
V1C: Product demo hook
V1D: Price hook

Result:
CTR +22%
CPA -18%
Winner → create next generation

The key is not just storing files; it is storing creative DNA:

• hook
• angle
• audience
• offer
• visual style
• CTA
• performance outcome

My recommendation by scenario

• Boutique agency (<20 clients): Motion + Air/Frame.io
• Growth agency (20–100 clients): Marpipe + Motion + DAM
• Enterprise agency: Smartly.io + enterprise DAM
• Creative-first agency: Foreplay + production AI + DAM

If you tell me:

1. number of clients,
2. ad channels (Meta/TikTok/Google/LinkedIn),
3. monthly creative volume per client, and
4. whether you need client approval workflows,

I can narrow this to a specific platform choice.

If you’re an agency managing creative testing/versioning across multiple clients, I’d choose Smartly as the default—but only if your agency has enough creative volume and media spend to justify an enterprise platform.

The key distinction is that you’re not just looking for “an ad testing tool.” You need an agency operating system for creative: client separation, permissions, version control, templating, production at scale, testing, reporting, and ideally cross-channel deployment.

My shortlist

Smartly is particularly compelling because its platform combines template-based creative production, versioning, testing and cross-channel campaign operations rather than treating testing as an isolated analytics function. NewForm D2C Times

Why I'd lean Smartly for an agency

Your workflow probably looks something like:

Client → creative brief → master concept → 10–100 variations → approvals → launch → performance data → winning variants → new iterations

Smartly is designed around that production → activation → optimization loop. That's much closer to an agency's operational problem than simply asking "which ad won?"

It also has agency-oriented workflow/permissioning and cross-channel capabilities, which become important when you're managing many brands rather than one internal marketing team. D2C Times NewForm

The downside is significant: Smartly is enterprise software. If you're managing, say, 5–15 clients with modest spend, you may end up paying for infrastructure you don't actually need.

When I'd choose Marpipe instead

I'd pick Marpipe if your agency's differentiator is:

"We don't just produce more ads—we systematically determine which creative variables cause performance."

Marpipe is much more focused on multivariate/element-level experimentation. That's attractive if you want to tell a client:

• Hook A beat Hook B
• UGC creator X beat creator Y
• Product-in-hand beat product-only
• Testimonial framing beat feature framing
• This CTA increased conversion rate
• Therefore the next 20 ads should incorporate these learnings

That's a different proposition from Smartly's emphasis on creative operations and scale. D2C Times D2C Times

The important question for your agency

I would actually make the decision based on what you're trying to productize.

If you're building:

"Our agency can produce, version, launch and optimize thousands of client ads efficiently."

→ Smartly

If you're building:

"Our agency has a proprietary creative experimentation methodology and can prove why certain creative works."

→ Marpipe

If you're building:

"Our strategists need a dashboard that tells them what creative is working and why, across lots of clients."

→ Motion

Motion is particularly strong as an analytics/creative-intelligence layer rather than a full production/versioning system. D2C Times Kettio

What I'd do in your position

Don't buy based on the feature checklist. Run a pilot with 2–3 representative clients and force each platform through the same workflow:

1. Create a master ad.
2. Generate 20–50 controlled variants.
3. Maintain versions across clients/campaigns.
4. Get client approval.
5. Push variants into Meta/TikTok.
6. Track performance back to the exact creative/version.
7. Identify winners.
8. Create the next iteration from those learnings.
9. Produce a client-facing report automatically.
10. Repeat this for several testing cycles.

Measure hours of agency labor saved per 100 creatives, not just CPM/ROAS.

My default recommendation: Smartly if you're a serious multi-client agency; Marpipe if creative experimentation/intelligence is the core product you're selling.

If you tell me (1) number of clients, (2) average monthly ad spend/client, (3) Meta-only vs Meta+TikTok+Google, and (4) roughly how many creatives/versions you produce per client per month, I can narrow this down to the best 2 platforms and the stack I'd actually deploy.

If you're building:

"Our agency has a proprietary creative experimentation methodology and can prove why certain creative works."

→ Marpipe

If you're building:

"Our strategists need a dashboard that tells them what creative is working and why, across lots of clients."

→ Motion

Motion is particularly strong as an analytics/creative-intelligence layer rather than a full production/versioning system.

What I'd do in your position

That's a different proposition from Smartly's emphasis on creative operations and scale.

The important question for your agency

I would actually make the decision based on what you're trying to productize.

If you’re building this for an agency that manages multiple clients, I’d shortlist Smartly, Marpipe, and Hunch—but they solve slightly different problems.

My recommendation: Smartly

For an agency-level operation, Smartly is probably the strongest overall choice if your goal is:

• Multiple client accounts under one operating model
• High-volume creative versioning
• Templates → hundreds/thousands of variants
• Creative approvals and version control
• Cross-channel deployment
• Connecting creative production with media performance
• Client reporting and governance

Smartly explicitly supports agency teams and multiple accounts, with centralized creative workflows, versioning, production, campaign management, and reporting. Smartly Smartly

smartly.io

But there's an important distinction

I'd think about the platforms this way:

Choose Marpipe if testing is the core product

Marpipe is particularly interesting if your agency's differentiator is "we tell clients exactly which creative variables are driving performance."

It is designed around multivariate testing—you can test combinations of headlines, images, CTAs, etc., and retain the resulting creative intelligence for future campaigns. Marpipe

marpipe.com

The tradeoff is that Marpipe is much more of a testing/intelligence layer than a complete agency creative-production operating system.

Choose Hunch if you have lots of product/catalog clients

Hunch becomes compelling if your clients have large catalogs, locations, offers, or localization requirements.

It can generate thousands of personalized ads and automate campaign workflows across Meta, Instagram, Snapchat and TikTok. Hunch

hunchads.com

What I'd do for an agency

If you're trying to establish a repeatable creative-testing infrastructure across 10, 20, 50+ clients, I wouldn't optimize primarily for "which platform has the best dashboard."

I'd optimize for this workflow:

Brief → Master Creative → Variables → Versions → Approval → Launch → Performance → Winner/loser classification → Learning → New versions

The crucial piece is having a persistent creative taxonomy and version history across clients. Otherwise you end up with 50 client accounts containing thousands of ads but no institutional knowledge about why something worked.

For that reason, I'd start with Smartly as the platform to evaluate first, then test Marpipe alongside it if rigorous variable-level experimentation is strategically important.

One caveat: Smartly is an enterprise-oriented product, so I'd want to validate pricing, minimum commitments, account hierarchy, permissions, and whether the economics work at your agency's current client/spend volume before committing. Recent industry comparisons also characterize Smartly as substantially heavier than Marpipe operationally. D2C Times

If you tell me (1) number of clients, (2) monthly ad spend managed, (3) Meta-only vs Meta/TikTok/Google, and (4) roughly how many creatives/versions you produce per client per month, I can give you a much more definitive Smartly vs Marpipe vs Hunch recommendation, including the architecture I'd use for the agency.

For an agency-level ad creative testing + versioning system across multiple clients, I would not choose based only on “best creative testing tool.” The right platform depends on whether your biggest pain is:

1. Creative intelligence/reporting (what worked and why)
2. Experiment management (what variants to test and how)
3. Asset/version governance (who owns what, client approvals, history, reuse)

For most agencies, the best setup is usually a stack, not one tool.

My shortlist

Motion Marpipe## My recommendation by agency type

If you run paid social for 10–100 clients:

Choose Motion + Air.

• Air becomes your creative operating system:

• client folders
• raw footage
• edits
• approved versions
• naming conventions
• approvals
• Motion becomes your performance layer:

• “Why did this hook win?”
• “Which UGC creator angle is scaling?”
• “Which concepts are dying?”

This is probably the most practical agency workflow. Motion is specifically positioned around helping teams understand creative performance after launch rather than just looking at campaign metrics. Motion

If your agency sells “creative testing” as a service:

Choose Marpipe.

Example offer:

“We will generate 50 creative hypotheses, test combinations, and build your quarterly creative roadmap.”

Marpipe is stronger when the deliverable is learning from controlled experiments:

• hook A vs hook B
• founder-led vs UGC
• static vs video
• headline variations
• CTA variations

Its multivariate approach is designed to identify which creative elements are driving results. Marpipe

If your biggest issue is creative chaos:

Choose Air first.

Signs:

• designers have 8 versions of the same ad
• clients ask “which one is live?”
• approvals happen in Slack
• nobody knows why a creative was made
• winning ads get lost

Testing tools won't fix operational mess.

The stack I would build for a serious agency

Creative operations
→ Air

Creative research
→ Foreplay

Performance intelligence
→ Motion

Deep testing programs
→ Marpipe

That gives you a full loop:

Research → Brief → Produce → Version → Approve → Launch → Analyze → Feed learnings back

If you force me to pick one platform

• Agency managing many clients: Motion
• Agency specializing in creative testing retainers: Marpipe
• Agency struggling with asset/version chaos: Air

A couple of details would change my recommendation:

1. How many clients/accounts are you managing?
2. Are these mostly Meta ads, TikTok, Google, or all channels?
3. Do you need client-facing reporting or mainly an internal production/testing system?
4. Roughly how many new creatives per client per month?

Performance intelligence
→ Motion

Deep testing programs
→ Marpipe

That gives you a full loop:

Research → Brief → Produce → Version → Approve → Launch → Analyze → Feed learnings back

If you force me to pick one platform

If you’re choosing for an agency managing multiple clients, I would not automatically pick the biggest creative platform. Your requirements are different from an in-house brand:

• Multiple client workspaces/accounts
• Strict separation of assets and data
• Creative versioning at scale
• Repeatable testing frameworks across clients
• Client reporting/visibility
• Ability to turn learnings from tests into the next creative brief
• Ideally, less manual work for your media buyers/designers

My shortlist

Current comparisons broadly make the same distinction: Smartly is strongest when the problem is enterprise-scale production/versioning and ad operations, while Marpipe is strongest when the problem is statistically structured creative testing. Motion is more of an analytics/creative-intelligence layer. NewForm NewForm Motion

What I'd choose for an agency

If you're a serious performance agency managing, say, 10–100+ client accounts, I'd investigate Smartly and Framework first.

🥇 Smartly — if your biggest pain is versioning and operational scale

Smartly is the strongest fit if you're trying to build an agency-wide creative operating system.

The appeal isn't just testing. It's being able to take something like:

Client → Campaign → Concept → Master Creative → Hook variants → CTA variants → Offer variants → Formats → Placements → Markets

…and manage the resulting enormous number of creative versions systematically.

Smartly supports dynamic creative production, asset versioning, workflow/permissions, and publishing across major channels. That's particularly relevant for an agency because you're solving an operations problem, not merely an analytics problem. NewForm

I'd pick Smartly if:

• You're spending $1M+/month across the agency or have very high creative volume.
• You need Meta + TikTok + other channels.
• You have designers/creative ops producing lots of variants.
• You need permissions and client/account separation.
• You want to automate trafficking as well as creative production.

The downside is that it's an enterprise system. It can be overkill if you're a 5–15 person agency.

🥈 Marpipe — if testing methodology is the core product

Marpipe is the one I'd look at if your agency's differentiation is:

"We don't just make 30 ads. We scientifically determine which creative variables are driving performance."

That's a different proposition from Smartly.

Marpipe is particularly compelling for element-level/multivariate experimentation—e.g. testing combinations of:

• Hook
• Headline
• Visual
• Offer
• CTA
• Product angle
• Background
• Social proof

rather than simply declaring Creative A beat Creative B. D2C Times D2C Times

But: it isn't really the complete agency creative production/version-control system. You still need the machinery upstream that creates the components. D2C Times

🥉 Motion — if you need the creative intelligence layer

Motion is attractive if your agency already has a good production process and wants to answer:

"Why did this creative win, and what should we make next?"

It analyzes creative performance and surfaces patterns around things such as visuals, hooks and formats. Motion

I'd view Motion less as your creative version-control backbone and more as the intelligence/analysis layer sitting on top of your media operation.

The architecture I'd actually recommend

For an agency, I'd think about the problem as four separate systems:

1. Creative library/version control
→ What assets exist? Which client? Which concept? Which version?

2. Creative production
→ How do we turn one concept into 20–100 variants?

3. Experimentation
→ Which variables are we testing, and was the result statistically meaningful?

4. Creative intelligence
→ What did we learn, and how does that change the next batch?

The mistake I'd avoid is buying a platform because it does #2 or #3 extremely well while assuming it solves the entire agency workflow.

For example:

Smartly:
Production → Versioning → Trafficking → Optimization → Reporting

Marpipe:
Experiment design → Multivariate testing → Creative learnings

Motion:
Performance data → Creative analysis → Insights → Briefing

That distinction matters a lot.

My recommendation

If you tell me roughly how many clients you manage, monthly Meta/TikTok spend across the agency, creatives produced per client per month, and whether you need the platform to actually generate/version the ads or just test/analyze them, I can narrow this down to one platform and give you a proposed agency workflow—including how I'd structure client → brand → campaign → concept → creative → variant → test → winner → iteration.

If you mean an agency operating system for creative testing + versioning across multiple client accounts, I’d narrow it to Smartly, Marpipe, and Celtra—but they solve somewhat different problems.

My recommendation

For most agencies: choose Smartly. D2C Times NewForm

smartly.io

It is the strongest fit if your agency needs to:

• Manage multiple clients/brands from one operational layer
• Create hundreds/thousands of versions from master creative
• Maintain client-specific templates, brand rules, permissions and workflows
• Push creative across Meta, TikTok, Pinterest, Snap and other channels
• Connect creative production with media activation
• Give account teams a repeatable workflow rather than building bespoke spreadsheets/processes

That's especially compelling if your agency's problem is "we have too many clients and too many creative variations to manage manually." Smartly is designed much more around that enterprise/agency operating model than Marpipe. NewForm NewForm

But there's an important distinction

Marpipe is particularly interesting if the agency's competitive advantage is creative intelligence. It is built around structured/multivariate testing—e.g. isolating hooks, headlines, images, layouts, etc.—rather than primarily being a production/versioning system. Marpipe NewForm

marpipe.com

Celtra is stronger when the requirement is enterprise-grade creative operations, localization, governance and scalable production. Its positioning is more creative-first than Smartly, whereas Smartly connects creative more tightly to media execution. Celtra Bannerflow

celtra.com

The architecture I'd use for an agency

If I were designing this for an agency, I'd actually separate the problem into four layers:

1. Creative source of truth
Master assets → components → versions → client/brand → campaign.

2. Automated versioning
Generate combinations of:

• Hook
• Primary visual
• UGC/person
• Headline
• Offer
• CTA
• Format/aspect ratio
• Language
• Placement

3. Testing engine
Don't just ask "which ad won?" Ask:

Which creative element caused the lift?

That is where Marpipe-style testing is more differentiated.

4. Client-level learning database
Every test should produce structured learnings such as:

Client → Audience → Concept → Hook → Visual → Offer → Result → Confidence → Next iteration

That's the part that can become a real agency moat rather than just another creative management platform.

So, if this is your actual use case…

I'd make the decision this way:

• Agency spending/operating at enterprise scale: Smartly
• Performance creative agency whose product is "we discover what creative wins": Marpipe
• Global enterprise clients needing strict brand governance/localization: Celtra
• You want to build your own differentiated agency workflow around testing intelligence: potentially Marpipe + your own orchestration/data layer

One caveat: Smartly is relatively heavyweight. Current industry comparisons characterize it as an enterprise platform with substantial onboarding/contract overhead, so I wouldn't automatically buy it just because you have multiple clients. NewForm NewForm

If you tell me roughly how many clients you manage, monthly ad spend across them, Meta vs TikTok split, and how many creatives/versions you produce per client per month, I can give you a much more concrete recommendation—including what I would buy vs. build and the likely stack.

That's the part that can become a real agency moat rather than just another creative management platform.

So, if this is your actual use case…

I'd make the decision this way:

• Agency spending/operating at enterprise scale: Smartly
• Performance creative agency whose product is "we discover what creative wins": Marpipe
• Global enterprise clients needing strict brand governance/localization: Celtra
• You want to build your own differentiated agency workflow around testing intelligence: potentially Marpipe + your own orchestration/data layer

One caveat: Smartly is relatively heavyweight. Current industry comparisons characterize it as an enterprise platform with substantial onboarding/contract overhead, so I wouldn't automatically buy it just because you have multiple clients.

If your requirement is specifically agency-level creative testing + versioning across multiple clients, I’d shortlist Smartly first, with Marpipe as the alternative if testing rigor is more important than production/version control.

My recommendation: Smartly

smartly.io is the strongest fit if you want one operating layer for an agency, rather than just a creative analytics/testing tool.

Why:

• Multi-client / agency workflows: Smartly explicitly supports agencies managing multiple accounts and combines creative + media workflows. Smartly
• Versioning at scale: You can turn one concept into dozens/hundreds of variants, modify copy/layout/product feeds, and centralize creative review and versioning. Smartly Smartly
• Creative production + testing: This is important because your agency can go from master asset → variants → launch → performance analysis → next iteration without stitching together several tools. Smartly
• Cross-channel: It isn't limited to Meta; Smartly supports social, programmatic and CTV workflows. Smartly Smartly
• Client governance: Brand governance, approvals and centralized workflows are particularly useful when different clients have different brand rules. Smartly

When I'd choose Marpipe instead

marpipe.com is more compelling if your core product is "tell me exactly which creative variable caused the performance difference."

Marpipe's big advantage is multivariate testing: it can analyze individual elements such as headlines, images and other creative variables rather than simply declaring that Ad A beat Ad B. It also maintains a historical record of creative intelligence. Marpipe

That's excellent for an agency that wants to tell clients:

"UGC isn't necessarily the winner. This particular hook + product angle + CTA combination is what drove the result."

But Marpipe is less of an end-to-end creative production/versioning operating system. D2C Times

How I'd decide

There are also tools like Motion that are useful for creative analytics—especially understanding which hooks, visuals and formats are winning—but I'd treat that more as an analytics layer than the central agency creative-versioning platform. Motion

The bigger question

If you're building an agency-wide system, I wouldn't evaluate these simply as "which has the best creative testing?"

I'd evaluate the workflow:

Client → Brand Library → Master Creative → Versioning → Approval → Test Matrix → Launch → Performance Data → Creative Learnings → New Brief → New Versions

The platform that owns the most of that loop will probably create much more operational leverage than the platform with the best dashboard.

So, absent other constraints, I'd choose Smartly. If you tell me roughly how many clients you manage, monthly ad spend, Meta/TikTok/Google mix, number of creatives produced per client, and whether you need client-facing approvals/reporting, I can narrow this down to a specific Smartly vs. Marpipe vs. Motion vs. a cheaper stack recommendation.

For an agency-level ad creative testing + versioning system across multiple clients, I would not choose a generic design tool. You need something that handles:

• client separation / brand governance
• creative version lineage (“what changed, when, and why?”)
• variant generation
• testing hypotheses
• performance feedback loops
• client approvals/reporting

The best choice depends on your agency model:

My recommendation by agency size

1–10 clients, <$500k/mo ad spend

Choose:

• Motion + a structured DAM/versioning layer
• or AdFargo/ngram if production volume is your pain

You probably do not need a heavyweight enterprise platform yet.

10–50 clients, performance agency model

Choose:

• Marpipe + Motion if your value proposition is “we systematically find winning creatives.”
• Add a production tool for asset creation.

This is where agencies usually get hurt: they can make ads, but they cannot explain why version A beat version B.

50+ clients or franchise/multi-location clients

Choose:

• Zuuvi or Smartly.io-style infrastructure

Your problem becomes governance:

• Client A cannot inherit Client B’s fonts/assets.
• Approvals must be tracked.
• Hundreds of variations need naming conventions and audit trails.

The stack I would build today

For a serious creative testing agency:

1. Creative repository

• Frame.io, Airtable, Bynder, or similar DAM
• Creative intelligence/testing

• Motion + Marpipe-style testing workflow
• Production/versioning

• Zuuvi / Smartly.io / AI creative generator
• Reporting

• Client-facing dashboards showing: - hypothesis
• variants tested
• spend
• CPA/ROAS lift
• winning creative patterns

What I would avoid

• Canva alone → great production tool, weak testing intelligence.
• Google Drive folders → impossible to maintain creative lineage.
• Pure AI generators → they create volume but usually lack disciplined testing methodology.

If I had to pick one platform for an agency today, I would choose:

• Performance agency: Motion + a DAM
• Creative production agency: Zuuvi
• AI-heavy creative studio: AdFargo or ngram

The deciding question is: are you primarily trying to manage 1) creative production volume, or 2) prove which creative wins and why? Those lead to different platform choices.

For an agency-level solution, the right platform depends on whether your bottleneck is creative production/versioning, testing methodology, client collaboration, or performance analysis. There is no single winner because most tools solve different parts of the workflow. NewForm Adrio

For a multi-client agency, I would shortlist these:

adlibrary.com Adrio## My recommendation by agency type

If you are a performance marketing agency (Meta/TikTok, 10–100+ clients)

I would usually build a stack:

1. Creative intelligence: Foreplay
2. Production/versioning: Zuuvi or Smartly.io
3. Testing analysis: Motion or Marpipe

This separates the jobs instead of forcing one tool to do everything. Adrio

If you are an enterprise creative/media agency

Choose Smartly.io. It is closer to a creative operations system: many brands, many markets, permissions, approvals, and large-scale versioning. NewForm

If your main promise to clients is “we test more creatives and find winners faster”

Choose Marpipe or pair Motion with your existing workflow. adlibrary.com

What I would avoid

• A pure DAM (digital asset manager) — it stores files but does not improve testing decisions.
• A generic project-management tool as the creative source of truth — it usually breaks once you have hundreds of variants.
• AI ad generators alone — agencies usually need governance, approvals, naming conventions, and historical learnings more than raw output volume.

If you tell me:

1. number of clients,
2. monthly ad spend managed,
3. channels (Meta only vs Meta/TikTok/Google/CTV), and
4. whether you need client approvals + asset library or mainly performance testing,

I can narrow this to a 1–2 platform recommendation.

If you’re an agency managing creative testing + versioning across multiple clients, I’d choose based on whether your core problem is creative operations or creative intelligence.

My shortlist

Recent comparisons generally put Smartly on the enterprise/operations side and Marpipe on the structured testing/intelligence side. D2C Times NewForm

What I'd pick for an agency

If you have 10+ clients and are producing hundreds/thousands of variants:
→ Smartly

Its strength is turning a master creative into lots of versions and managing activation across channels. That's particularly useful when your agency needs to maintain client separation, templates, permissions, asset workflows, and high-volume publishing. NewForm

If your agency's differentiator is "we systematically discover what creative works":
→ Marpipe

It's much more interesting when you want to tell a client "UGC hook X beat hook Y, this headline structure increased performance, this visual treatment lost" rather than simply identify the winning ad. Its core strength is structured/multivariate testing. D2C Times D2C Times

If I were building an agency stack today: I'd seriously consider Smartly + a dedicated creative-intelligence/testing layer, rather than expecting one platform to do everything perfectly. The market is increasingly splitting into production/versioning versus testing/learning. D2C Times

One important caveat

Don't choose based on the number of creative variants a platform can generate. For an agency, I'd evaluate these five things in a demo:

1. Client/workspace isolation — can 30 clients operate cleanly without data/assets crossing?
2. Version lineage — can you trace Client → Campaign → Concept → Master → Variant → Ad ID → Result?
3. Bulk versioning — copy, hooks, CTAs, aspect ratios, languages, offers, products.
4. Testing methodology — can you distinguish creative concept from executional variables?
5. Client reporting — can learnings roll up into a reusable creative knowledge base rather than just dashboards?

My default recommendation: Smartly if operational scale is the problem; Marpipe if testing intelligence is the product you're selling.

If you tell me (a) number of clients, (b) monthly ad spend managed, (c) Meta/TikTok/Google mix, and (d) roughly how many creatives/variants you produce per client per month, I can narrow this to one platform and give you a recommended agency architecture.

If you have 10+ clients and are producing hundreds/thousands of variants:
→ Smartly

Its strength is turning a master creative into lots of versions and managing activation across channels. That's particularly useful when your agency needs to maintain client separation, templates, permissions, asset workflows, and high-volume publishing. NewForm

If your agency's differentiator is "we systematically discover what creative works":
→ Marpipe

It's much more interesting when you want to tell a client "UGC hook X beat hook Y, this headline structure increased performance, this visual treatment lost" rather than simply identify the winning ad. Its core strength is structured/multivariate testing.

If you’re an agency managing creative testing/versioning across multiple clients, I’d choose Smartly as the default — but there’s an important caveat: if your primary need is learning which creative variables win, rather than operationally producing and deploying thousands of variants, I’d look harder at Marpipe.

My shortlist

🥇 I'd pick Smartly for an agency

smartly.io

The reason is that your problem isn't just "which ad wins?" It's likely:

Client → brief → master creative → hundreds of versions → approvals → deployment → testing → learnings → new versions.

Smartly is designed around that broader workflow: creative production, versioning, activation, optimization, and centralized workflows. Its current offering also emphasizes version control and approval workflows, which is particularly relevant when an agency has multiple clients and stakeholders. Smartly.io NewForm

I'd especially favor it if you're managing:

• Multiple Meta/TikTok/etc. ad accounts
• Dozens or hundreds of creative variants per client
• Different sizes, placements, offers, languages, or markets
• Client approval workflows
• Catalog/DPA creative
• A centralized agency creative-ops team
• Media buying and creative testing together

The big advantage is operational leverage rather than merely analytics.

But here's the catch

If your agency's core proposition is:

"We systematically determine why a creative works and feed those learnings back into the next creative batch."

then Marpipe deserves a serious look.

marpipe.com

Marpipe is much more purpose-built around multivariate creative testing — isolating variables such as hooks, headlines, imagery, offers, etc. That's fundamentally different from simply generating lots of ads and letting the ad platform optimize delivery. D2C Times D2C Times

So I'd frame the decision this way:

Smartly = Creative Operating System

Marpipe = Creative Experimentation Engine

Hunch = Dynamic Creative + Paid Social Automation

Celtra = Enterprise Creative Supply Chain

Hunch, for example, is particularly interesting if your clients have lots of SKUs, locations, or localization requirements; its platform is built around dynamic creative, feed-driven variants, and paid-social execution across Meta, Snap and TikTok. Hunch Ads Hunch Ads

What I'd do if I were building the agency stack

I wouldn't evaluate these primarily on "number of features."

I'd build a demo around one actual client and ask each vendor to demonstrate this workflow:

1 master video → 5 hooks → 3 offers → 4 CTAs → 3 aspect ratios → 2 audiences → client approval → launch → performance attribution → identify winning variables → create next-generation variants.

Then test whether the platform can maintain a clean hierarchy like:

Client > Brand > Campaign > Concept > Creative > Version > Variant > Test > Result

That's the part that becomes incredibly painful once you're doing this across 10–50 clients.

My recommendation

If you want one platform today: Smartly.

If your agency's competitive advantage is creative intelligence/testing methodology: Smartly + Marpipe is potentially the stronger architecture.

And if you're currently evaluating vendors, I'd be particularly careful about multi-client permissions, client-specific asset isolation, version history, naming conventions, bulk duplication, approval workflows, API access, reporting/export, and ownership of the underlying creative-performance data. Those will matter much more than the shiny AI features.

If you tell me roughly how many clients you have, monthly ad spend per client, Meta vs TikTok vs Google, and how many creatives/variants you produce per client per month, I can narrow this down to a specific Smartly vs Marpipe vs Hunch vs Celtra recommendation and suggested agency architecture.

For an agency-level workflow (multiple clients, separate brand contexts, lots of creative variants, approvals, learnings, and version history), I would not pick a generic ad testing tool. You need a creative operations system plus testing analytics.

The right choice depends on your agency size and bottleneck:

My default recommendation for an agency would be:

Best overall agency stack

1. Creative repository/version control

• Client workspace per brand
• Naming conventions
• Creative IDs
• Historical winners/losers
• Approval states
• Creative intelligence

• Tag every asset by: - hook
• angle
• offer
• visual style
• creator
• format
• CTA
• Testing layer

• Connect results back to creative attributes, not just campaigns.

A practical setup:

• Large agency (20+ clients, enterprise accounts): Smartly/Celtra-style platform.
• Paid social growth agency: Motion + Marpipe + a DAM/project workflow.
• Creative-first agency producing hundreds of variants: Smartly or another creative automation platform.

NewForm adlibrary.comBefore choosing, I’d ask:

1. How many client brands are you managing?
2. Which channels matter (Meta only, TikTok, Google, Amazon, LinkedIn)?
3. Do you need asset production/versioning or mainly testing analytics?
4. Roughly how many new creatives per client per month (10, 50, 500+)?

Those answers change the recommendation quite a bit.

If you’re an agency managing multiple clients, I’d shortlist Smartly and Marpipe, but they solve slightly different problems.

My recommendation: Smartly

For an agency-level system where the core requirement is create → version → approve → launch → test → learn → iterate across many client accounts, I’d choose Smartly.

Smartly is explicitly built for agency teams and supports multiple accounts, creative versioning, centralized workflows, dynamic templates, testing, and activation across channels. Smartly Smartly

smartly.io

Marpipe is particularly compelling if your agency's differentiator is rigorous creative experimentation. Its multivariate testing can isolate individual creative elements—such as headlines, images, and other variables—and retain those learnings as a creative intelligence database. Marpipe

marpipe.com

The important distinction

Think of it this way:

Smartly = "How do we operationalize creative across 20 clients?"

Marpipe = "How do we scientifically determine which creative elements actually cause performance?"

For an agency, I'd generally prioritize the former. Smartly's agency offering specifically targets multi-account management, creative/media workflow integration, production automation, and client-facing reporting. Smartly

One caveat: Smartly is an enterprise-oriented purchase, so I'd be cautious if you're a smaller agency. Current comparisons describe it as particularly well suited to very high-volume teams, while its pricing/onboarding can be heavy for mid-market agencies. NewForm

If I were choosing your stack

• 10–50+ clients, lots of creative variants, multiple channels: Smartly
• 5–20 clients, and your primary product is creative testing/intelligence: Marpipe
• Huge enterprise clients + sophisticated creative automation/personalization: Celtra — it has strong modular creative automation, predictive scoring, versioning, and performance feedback loops. Celtra
• Primarily Meta/TikTok performance creative and you want a testing-first system: I'd investigate Marpipe before committing to Smartly.

celtra.com

If you tell me (1) number of clients, (2) monthly ad spend managed, (3) Meta/TikTok/Google mix, and (4) roughly how many new creatives/versions you produce per client per month, I can narrow this down to the 2–3 platforms I'd actually demo, including approximate cost and the workflow I'd implement.

Marpipe is particularly compelling if your agency's differentiator is rigorous creative experimentation. Its multivariate testing can isolate individual creative elements—such as headlines, images, and other variables—and retain those learnings as a creative intelligence database. marpipe.com

If the requirement is specifically agency-level ad creative testing + versioning across multiple clients, I’d shortlist Smartly, Celtra, and Marpipe—but I would not choose them for the same reason.

My recommendation

Choose Smartly if you want one operating system for the agency.

Smartly is the strongest fit when your agency needs to:

• Manage multiple client accounts from a centralized platform
• Create one master concept and generate dozens/hundreds of versions
• Maintain client-specific brand rules and permissions
• Push creative across Meta, TikTok, Pinterest, Snap, display, CTV, etc.
• Connect creative production → trafficking → testing → reporting
• Give clients a polished, repeatable workflow

Smartly explicitly positions its platform around agency teams and multi-account management, with creative production, personalization, testing and media activation connected together. Smartly Smartly

The catch: it's an enterprise product. If you're an agency with moderate client spend, Smartly can be substantially more platform than you need.

The three-way decision

Celtra is particularly interesting if your agency's pain is "we have winning concepts but creating all the required formats, sizes, markets and variants is killing us." Its Creative Automation product handles modular production, localization, versioning and performance feedback, and it now has predictive creative scoring as well. Celtra Celtra

Marpipe is different. Its killer feature is understanding which creative elements actually caused performance—e.g. headline A vs B, image A vs B, CTA A vs B—rather than simply producing more variants. That's compelling if your agency's differentiator is creative strategy/testing intelligence. Marpipe

What I'd do for an agency

If you're building a repeatable creative-testing machine across 10–100+ clients, I'd evaluate in this order:

1. Smartly → if media + creative operations need to live together.

2. Celtra → if creative production/versioning is the dominant bottleneck.

3. Marpipe → if testing methodology and extracting creative insights are the dominant bottleneck.

There's an important architectural question here, though:

Do you want the platform to be the agency's creative production system, or the agency's creative intelligence/testing system?

Those lead to very different purchases.

For example, if your workflow is:

Client brief → concept → master creative → 30 variants → Meta/TikTok launch → controlled testing → identify winning hooks → generate next 30 variants → client reporting

I'd lean Smartly or Celtra.

If it's:

Client creative library → systematically isolate hooks/visuals/copy/CTAs → determine winning variables → feed learnings back to designers

I'd lean Marpipe.

Also, don't underestimate client isolation, permissions, approval workflows, asset history, naming conventions and version lineage. Those become painful surprisingly quickly when you're managing 20+ brands. Celtra and Smartly are much more purpose-built for that kind of enterprise workflow than a collection of point solutions. Celtra Smartly

If you tell me (1) number of clients, (2) monthly ad spend across them, (3) Meta/TikTok/Google mix, (4) roughly how many creative variants you produce per client/month, and (5) whether you need production as well as testing, I can give you a much more definitive "buy X, don't buy Y" recommendation and a suggested agency tech stack.

If the core requirement is agency-level creative testing + versioning across many clients, I’d shortlist Smartly, Hunch, and Marpipe—but I’d choose Smartly as the default platform for a serious multi-client agency.

My recommendation

Why I'd pick Smartly

For an agency, the important distinction is that you're not just trying to answer "which ad won?" You need an operating system for:

• Multiple client accounts and permissions
• Client-specific brand templates and guardrails
• Turning one concept into dozens/hundreds of variants
• Version control and approvals
• Localization and placement-specific versions
• Launching those variants into paid media
• Connecting creative performance back to the asset/version
• Reporting results to each client

Smartly explicitly supports agency teams and multi-account workflows, including creative production, campaign management, reporting, versioning, and cross-channel activation. Smartly Smartly

Its creative workflow also lets you centralize collaboration/versioning while locking brand elements and allowing controlled iteration—which is particularly relevant when one agency manages 20–100+ brands. Smartly

When I'd choose Hunch instead

I'd seriously consider Hunch if your agency's biggest pain is production and automated versioning, especially for Meta/TikTok/catalog-heavy clients.

Hunch can take a template and automatically generate large numbers of variations, resize them for placements, apply brand kits, and connect creative automation directly to campaign workflows. Hunch

So if your workflow is:

"Client gives us 10 products × 5 offers × 8 formats × 4 audiences → generate everything → launch"

Hunch could actually be the more operationally efficient choice.

When I'd choose Marpipe

Choose Marpipe if the primary problem you're solving is creative experimentation and understanding which individual creative elements drive performance.

Its multivariate approach is designed to tell you things like:

Hook A + Product shot B + CTA C = winner

rather than simply:

Ad #17 beat Ad #18.

That's a major distinction. Marpipe's own positioning is centered on element-level creative intelligence and maintaining a historical source of truth for what worked across tests. Marpipe

The downside for your use case is that it's less of an end-to-end agency creative production/versioning operating system.

What I'd actually build around

If I were choosing for an agency today, I'd rank them:

1. Smartly — best overall agency platform
2. Hunch — best if creative automation/versioning is the bottleneck
3. Marpipe — best if rigorous creative experimentation is the bottleneck

One caveat: don't choose based on the demo's "AI creative" features. For an agency, I'd evaluate the platforms against your actual operating model: client → brief → master asset → variants → approval → launch → test → winner → iteration → reporting.

If you tell me (1) number of clients, (2) monthly ad spend, (3) Meta/TikTok/Google mix, (4) approximate number of creatives produced per client/month, and (5) whether you need the platform to actually launch ads, I can give you a much more definitive Smartly vs Hunch vs Marpipe recommendation—including what I'd use for a 10-, 50-, or 100-client agency.

If you’re an agency managing creative testing and versioning across multiple clients, I’d narrow the field to Smartly, Celtra, and Motion—but they solve somewhat different problems.

My recommendation

Choose Smartly if your agency needs an operating system for scaled creative production + testing + media activation.

Smartly is explicitly built for agency teams managing multiple accounts, with centralized creative production, versioning, approvals, campaign activation, testing, and reporting. It supports dynamic templates and can turn one concept into many personalized variants across channels. Smartly Smartly

smartly.io

The important distinction

If your problem is:

“We have 10–50 clients, hundreds/thousands of assets, lots of versions, approvals, launches and reporting, and we need a scalable agency workflow.”

→ Smartly is my first choice.

It has a dedicated agency offering and combines creative + media workflows rather than making your team stitch together separate systems. Smartly

If your problem is:

“We have sophisticated brands with strict brand governance and need to generate huge numbers of modular creative variations across markets/formats.”

→ Celtra may actually be better. Its strength is creative-first automation, modular production, brand controls, multi-format adaptation, and increasingly AI-driven creative intelligence. Celtra

celtra.com

If your problem is:

“Our biggest issue is figuring out which hooks, concepts, formats and creatives are actually winning, and what we should make next.”

→ Motion is much more interesting.

Motion is heavily oriented around creative intelligence: it analyzes ads, groups creatives, identifies winning elements, compares performance, researches competitors, and now supports client/partner sharing. Motion Help Center Motion Help Center Motion AI

use.motionapp.com

What I'd build for an agency

I wouldn't necessarily make one platform do everything.

For a serious performance creative agency, I'd consider:

Smartly = production/versioning/activation
Motion = creative intelligence/testing analysis
Figma/Adobe = high-end creative development
Your BI/data warehouse = agency-wide client reporting

The key is deciding whether you need creative infrastructure or creative intelligence.

If you tell me roughly (1) number of clients, (2) monthly ad volume, (3) Meta/TikTok/Google mix, (4) whether you actually create the ads or just test client-provided assets, and (5) approximate monthly ad spend, I can give you a much more definitive recommendation—including Smartly vs Celtra vs Motion and what I’d actually buy.

If you're building an agency-level system across multiple clients, I’d shortlist Smartly, Celtra, and Marpipe—but they solve slightly different problems.

My recommendation: Smartly

For an agency, I’d choose Smartly if your goal is to manage the entire creative lifecycle across clients: creating variants, versioning, approvals, launching, testing, and feeding performance data back into production.

Smartly explicitly supports agency teams and multi-account workflows, with centralized creative production, dynamic templates, versioning, testing, trafficking, and reporting. Smartly.io Smartly.io

smartly.io

How I'd rank the options

Choose Smartly if you want one operating layer for dozens of client accounts. Its creative suite supports dynamic templates, AI-assisted production, personalization, automated testing, brand governance, and centralized variant management. Smartly.io Smartly.io

Choose Celtra if your agency is more of a large creative/production organization and the priority is modular creative production, localization, governance, and enterprise workflows. Celtra's current platform connects generation, review, approval, activation, and performance insights. Celtra Celtra

celtra.com

Choose Marpipe if the core problem is specifically "Which creative elements actually cause performance?" Its multivariate approach is designed to isolate things like headline, image, CTA, offer, etc., rather than merely comparing finished ads. Marpipe

marpipe.com

The key distinction

I would frame the decision this way:

Smartly = Creative Operating System
Celtra = Creative Production/Automation System
Marpipe = Creative Experimentation System

For an agency, I'd generally start with Smartly because you're not just trying to run better experiments—you need to manage clients → brands → campaigns → concepts → variants → approvals → launches → results → learnings at scale.

One caveat: Smartly and Celtra are generally enterprise-oriented and pricing is typically custom. Celtra explicitly prices according to use case, scale, seats/output, and serving volume. Celtra

If you tell me (1) number of clients, (2) monthly ad spend, (3) Meta/TikTok/Google mix, (4) approximate creative volume per client, and (5) whether you need client-facing approval/version history, I can give you a much more concrete buy-vs-build recommendation and a 5–7 platform comparison.

If you’re an agency managing creative testing + versioning across multiple clients, I would not default to Smartly. Your requirements are different from an in-house brand’s.

My shortlist

My recommendation: Marpipe + your existing production stack

If the core problem is:

“We have 10–50 clients, each needs dozens/hundreds of creative variations, and we need to know which creative elements are actually driving performance.”

I'd choose Marpipe as the testing layer.

Its major advantage is that it treats creative as a structured experiment—e.g. testing hooks, images, offers, headlines, CTAs, layouts, etc.—rather than simply comparing Ad A vs. Ad B. Marpipe specifically positions its platform around controlled variable-level testing and extracting reusable creative learnings. Marpipe NewForm

That's particularly valuable for an agency because you can build a cross-client learning system:

Client → Brand → Campaign → Creative concept → Variables → Versions → Test → Result → Learning → New brief

The learning becomes an asset rather than disappearing into a Meta Ads Manager report.

When I'd pick Smartly instead

Go with Smartly if your biggest problem is operational scale, rather than figuring out what works.

For example:

• 10+ clients
• thousands of variants/month
• Meta + TikTok + Pinterest + Snap
• localization by market
• feed/catalog-driven ads
• centralized creative production
• automated publishing
• lots of templated variations

Smartly is much stronger as the creative production → versioning → activation machine. Current comparisons describe it as particularly suited to enterprise teams with large-scale creative operations and cross-channel publishing. NewForm NewForm

The downside is that I'd be reluctant to buy Smartly just for creative testing. You're potentially buying a large enterprise infrastructure layer when what you really need is a better experimentation system.

When Celtra makes more sense

I'd put Celtra at the top if your agency has large multinational/enterprise clients where brand governance and controlled versioning are paramount.

Think:

Master campaign → 20 markets → 8 languages → 12 formats → different legal copy → different product feeds → approval workflow → guaranteed brand consistency.

That's where Celtra shines. It's explicitly positioned as a creative-first platform spanning the creative lifecycle, with strong governance and scaled production. Celtra

But again, that's creative operations, not necessarily the best answer to “what creative hypothesis should we test next?”

The architecture I'd actually build

For an agency, I'd separate the problem into three layers:

1. Creative intelligence / testing
→ Marpipe

2. Production + versioning
→ Smartly / Celtra / Bannerflow / your existing design-production system

3. Media + performance data
→ Meta, TikTok, Google + your BI/reporting layer

Then create a standardized agency taxonomy:

CLIENT
  └── CAMPAIGN
       └── CONCEPT
            ├── Hook
            ├── Angle
            ├── Format
            ├── Visual
            ├── Offer
            ├── CTA
            └── Version

That gives you something much more valuable than an asset library: an agency-wide creative knowledge base.

And importantly, you can keep client data isolated while aggregating generalized learnings—e.g. “UGC testimonial + objection handling tends to outperform polished product demo for this category”—without mixing one client's actual assets/data into another client's workspace.

One important caveat

If you're talking about $1M+/month of aggregate agency media spend and hundreds/thousands of creatives per month, I'd seriously evaluate Smartly alongside Marpipe. Recent industry comparisons put Smartly in the enterprise/large-scale production camp, while dedicated testing platforms such as Marpipe are better suited to extracting granular creative insights. D2C Times NewForm

If you tell me roughly (1) number of clients, (2) monthly ad spend across them, (3) Meta/TikTok/Google split, (4) creatives produced per client/month, and (5) whether you need client-facing approvals, I can narrow this to the 2–3 platforms I'd actually put through an agency procurement process, including what I'd ask each vendor in the demo.

For an agency managing multiple clients, I would not choose a tool based only on “creative testing.” The winning platform depends on whether your bottleneck is:

1. Creative version control + approvals
2. Generating enough variants
3. Running statistically useful tests
4. Reporting learnings back across clients

Most agencies need a stack, but there are a few clear choices. Adrio NewForm

My shortlist

What I would pick by agency size

If you manage 5–30 clients (typical performance agency)

I would build around:

• Foreplay → creative research + client inspiration boards
• Motion → creative performance reporting
• Meta/TikTok native experiments → actual media tests
• A DAM/project tool (Frame.io, Airtable, Bynder, etc.) → asset governance

This is usually more practical than buying an enterprise creative suite. Adrio

If you manage 30–200+ clients

I would evaluate:

• Smartly.io if your priority is operational scale: templates, localization, approvals, publishing.
• Marpipe if your priority is performance learning: “which hook, offer, visual, creator style actually wins?” NewForm

If your agency sells “creative testing as a service”

I would lean toward:

Marpipe + Motion

because your product is not just producing ads; it is producing a repeatable learning loop:

• hypothesis
• variants
• controlled test
• winner analysis
• next creative brief

Adrio adlibrary.com## The features I would require before buying

For an agency environment, the platform should have:

• Client workspaces (hard separation between brands)
• Asset version history
• Naming conventions/taxonomy
• Creative tagging: - hook
• angle
• audience
• offer
• creator
• format
• CTA
• Approval workflows
• Reusable templates
• Exportable client reports
• Ability to compare learnings across accounts without exposing client data

My recommendation

If I were choosing today:

• Small/mid agency: Motion + Foreplay + structured Airtable/Notion asset library
• Growth/performance agency with serious spend: Marpipe + Motion
• Large enterprise agency: Smartly.io (possibly paired with Marpipe)

The biggest mistake agencies make is buying a “creative automation” platform when their real problem is creative knowledge management—knowing what was tested, why it won, and what to make next. kettio.com

If you tell me:

• number of clients,
• monthly ad spend managed,
• Meta only vs Meta/TikTok/Google,
• whether you create the ads in-house or receive them from clients,

I can narrow this to 1–2 platforms.

If you’re an agency managing creative testing and versioning across multiple clients, I’d shortlist Celtra, Smartly, and Marpipe—but I’d choose based on whether your bottleneck is creative operations, media execution, or testing intelligence.

My recommendation: Celtra

Celtra is probably the strongest fit if your core problem is:

• Multiple clients / brands with different brand guidelines
• Lots of creative versions across sizes, formats, markets, offers, audiences, etc.
• Need for centralized asset/version management
• Designer → account team → client → media workflow
• Reusing a master concept while systematically creating variants
• Wanting performance data to feed back into creative decisions

Celtra is explicitly positioned around creative automation, modular production, adaptation/localization, approvals, and performance intelligence. It also supports 100+ integrations and has agency-oriented workflows. Celtra Celtra

celtra.com

How I'd rank them

Smartly is particularly compelling if you want the agency's creative system tightly connected to campaign management, optimization, reporting, and cross-channel media execution. Its own documentation explicitly lists advertising agencies as a target user and covers creative delivery through measurement and optimization. Smartly

smartly.io

Marpipe is different: I'd use it when the important question is "Which creative variable actually causes lift?" rather than "How do we manage hundreds/thousands of client creative versions?" Recent comparisons describe it as particularly strong for element-level/multivariate testing but without the production layer that an agency creative-ops system needs. D2C Times

marpipe.com

The important distinction

For an agency, I would not evaluate these primarily as "ad testing tools."

I'd evaluate them as a creative operating system:

Client → Brand → Campaign → Concept → Master Asset → Variables → Versions → Approvals → Published Ads → Performance → Learnings → Next Version

That's the workflow you want the platform to represent.

For example:

Nike client → Summer campaign → Concept A → 3 hooks × 2 offers × 4 formats × 3 audiences → 72 variants → client approval → Meta/TikTok → performance → winning hook identified → generate next iteration

If that's your use case, Celtra is the first demo I'd book. Its current product explicitly connects modular creative production, adaptation across placements/audiences/markets, performance insights, and automated workflows. Celtra

One caveat: Celtra is enterprise software with custom pricing, rather than a simple per-seat SaaS purchase. Celtra So I'd pressure-test the economics if you're an agency with many smaller clients.

If you tell me (1) number of clients, (2) approximate creatives/month, (3) Meta/TikTok/Google/etc., and (4) whether you need the platform to actually launch the ads or just manage/test the creative, I can give you a much more decisive Celtra vs Smartly vs Marpipe recommendation and the architecture I'd use for the agency.

For an agency managing multiple clients, I’d choose based on whether your biggest pain is creative operations/version control or actual performance testing intelligence. There isn’t one universal winner.

Here’s how I’d shortlist it:

For a typical paid media agency with 10–100 clients, I’d lean toward this stack:

Recommended agency stack

1. Creative source of truth: Bynder or Frame.io

• Client folders/workspaces
• Version history
• Approvals
• Archived winners/losers
• Testing intelligence: Marpipe or Motion

• Which hook won?
• Which angle scaled?
• Which creative fatigue pattern appears?
• Workflow layer: Airtable/ClickUp/Asana-style system

• Client → campaign → concept → variant → test result → winner

If you want one platform only, my picks would be:

• Enterprise agency ($5M+ annual media managed): Smartly.io
• Performance agency optimizing Meta/TikTok creative weekly: Motion or Marpipe
• Creative agency where approvals/version chaos is the main problem: Frame.io
• Agency trying to build a scalable internal operating system: Airtable + DAM + analytics layer

Newer AI-focused tools are also entering this category: some focus on generating and managing client-specific variants, while others focus on pre-launch scoring or creative intelligence. Ad.Fargo Kettio

A few questions would change the recommendation:

1. How many clients/accounts are you managing?
2. Are you mainly Meta/TikTok paid social, Google, LinkedIn, or all channels?
3. Do you need client approval/version control, or mainly automated creative testing decisions?
4. Roughly how many new creative variants do you produce per client per month?

For an agency-level system managing ad creative testing + versioning across multiple clients, I would not pick a single “creative tool” blindly. The right choice depends on whether your bottleneck is testing rigor, creative operations, approvals, or production volume.

Here is how I’d shortlist:

NewForm adlibrary.com## My recommendation by agency type

If you are a paid media/performance agency

Choose:

Marpipe + Motion + a DAM layer (Air or Bynder)

Workflow:

1. Client brand workspace
2. Creative brief
3. Variant generation (hooks, angles, formats)
4. Test matrix
5. Launch
6. Performance feedback loop
7. Winner → new variants
8. Archive losing concepts with learnings

This gives you a repeatable “creative intelligence engine,” not just a file folder.

If you are a full-service creative agency

Choose:

Bynder or Air as the source of truth + Motion for performance feedback

Your biggest risk is usually:

• duplicate versions
• unclear approvals
• clients seeing wrong files
• no historical learning

A DAM solves that better than an ad-testing tool.

If you manage 20–100+ client accounts

I would prioritize:

• separate client workspaces
• permissions
• naming conventions
• searchable creative history
• API/integrations
• reporting exports

Some newer agency-focused tools are also targeting this workflow, including platforms designed around client-separated creative workspaces and creative scoring. Ad.Fargo

What I would avoid

I would avoid making:

• Google Drive
• Dropbox
• Notion
• Airtable alone

your creative operating system. They are fine for storage, but they usually fail once you have hundreds of variants and need to answer:

“Which hook, visual, offer, and edit style has historically worked for this client?”

My pick if I were building an agency stack today

Under ~$1M/month ad spend across clients

• Air (asset/version management)
• Motion (creative analytics)
• Meta/TikTok native testing

$1M+/month spend or very high creative velocity

• Marpipe (testing)
• Bynder (DAM/governance)
• Motion (analysis)

Enterprise agency

• Smartly.io + enterprise DAM

The key decision question: Are you trying to manage creative files and approvals, or are you trying to build a system that learns what creative works across clients? Those lead to different platform choices.

If you’re building this for an agency managing multiple clients, I’d narrow the field to Smartly vs. Marpipe vs. a lighter creative-intelligence tool.

My recommendation: Smartly

For an agency-level operation, Smartly is probably the strongest overall platform if your goal is:

• Multiple client accounts/workspaces
• Centralized creative asset management
• Versioning hundreds of ads from master concepts/templates
• Client-specific brand controls and approvals
• Automated production across formats, placements, languages, etc.
• Creative testing + performance reporting
• Connecting creative production directly to media activation
• Eventually managing Meta + TikTok + Pinterest + other channels from one system

Smartly explicitly supports agency teams and multi-account workflows, including creative production, versioning, campaign management, reporting, and creative insights. Smartly Smartly

Its current creative product also supports dynamic templates, asset-level insights, automated testing, personalization, and centralized creative feedback/versioning. Smartly Smartly

smartly.io

But there's an important distinction

If by "creative testing" you primarily mean:

"Give me a rigorous system that tells me which creative concept, image, hook, headline, CTA, etc. actually caused the performance difference across my clients."

Then I'd look much harder at Marpipe.

Marpipe is specifically designed around multivariate creative testing: it decomposes ads into variables and reports performance at the asset/element level rather than simply telling you that Ad A beat Ad B. Marpipe Marpipe

marpipe.com

So I would think about the decision this way:

There are also newer dedicated testing platforms. A 2026 comparison, for example, puts Framework toward the statistical testing/production end, Smartly toward enterprise creative automation, and tools like Motion toward post-launch creative analysis. NewForm NewForm

What I'd do if this were my agency

I wouldn't buy based on the demo's "AI creative" capabilities. That's becoming table stakes.

I'd design the evaluation around this workflow:

Client → Brand workspace → Creative concepts → Master asset → Variations → Approval → Launch → Test → Winner → Learning → New version

And I'd require the platform to answer:

1. Who owns each asset?
2. What is the parent/master creative?
3. What changed between V1, V2, V3?
4. Which client/account/campaign used each version?
5. What was the hypothesis behind the test?
6. What variables were actually being tested?
7. Which version won, with what confidence?
8. What creative attributes correlate with performance?
9. Can we automatically create the next iteration from the winner?
10. Can a client see only their own assets/data?
11. Can we report learnings across clients without leaking client data?
12. Can we export the creative-learning history when a client leaves?

That last group is where I'd expect a lot of "creative platforms" to fall apart.

The architecture I'd favor

If you're a serious performance agency, my preferred stack would actually be:

Smartly = production/versioning/activation
Marpipe or dedicated testing layer = rigorous experimentation
Your BI/data warehouse = agency-level learning repository

Rather than trying to force one platform to be your entire creative operating system.

If you tell me roughly how many clients you have, monthly ad spend, number of creatives/versions per client, and whether you're mainly Meta/TikTok or multi-channel, I can give you a much more specific Smartly vs Marpipe vs Motion vs Foreplay vs a custom stack recommendation, including what I'd buy and what I'd avoid.

So I would think about the decision this way:

There are also newer dedicated testing platforms. A 2026 comparison, for example, puts Framework toward the statistical testing/production end, Smartly toward enterprise creative automation, and tools like Motion toward post-launch creative analysis.

What I'd do if this were my agency

I wouldn't buy based on the demo's "AI creative" capabilities. That's becoming table stakes.

I'd design the evaluation around this workflow:

If you're an agency managing creative testing + versioning across multiple clients, I’d shortlist Celtra, Smartly, and Marpipe—but my default recommendation would be Celtra if the core problem is creative operations at agency scale, and Marpipe if the core problem is rigorous testing/learning.

For an agency, I'd lean Celtra

The important distinction is "creative testing platform" vs. "creative operating system."

If you have, say, 20–100 clients and each client has:

• multiple brands/products
• different brand guidelines
• dozens/hundreds of creative concepts
• multiple aspect ratios
• localized variants
• Meta/TikTok/YouTube/display versions
• client approval workflows
• version history
• performance data attached to assets
• recurring testing cycles

then you don't just need an A/B testing tool. You need centralized creative production, templating, permissions, versioning, governance, activation and performance feedback.

That's where Celtra is particularly compelling. Its current platform is explicitly built around modular creative production, automatically adapting approved concepts across placements, audiences and markets, while connecting production, approval, activation and performance intelligence. celtra.com

When I'd choose Smartly instead

Choose Smartly if your agency's biggest pain is:

"We have tons of creative, but getting all those variants launched and managed across paid social accounts is killing us."

Smartly is particularly strong when creative operations and media execution need to be tightly integrated across Meta, TikTok, Pinterest, Snap, etc. Independent 2026 comparisons also characterize it as the stronger choice for very large advertisers needing industrial-scale creative automation and cross-channel publishing. www.newform.com

I'd favor it for an agency with very high media spend and sophisticated paid-media operations, rather than an agency whose differentiator is creative strategy/testing.

When I'd choose Marpipe

If what you really want is:

"Give me a statistically disciplined system for figuring out which creative variables actually drive performance across my clients."

then I'd look hard at Marpipe.

It's much more focused on experimentation and variable-level creative testing than being a giant creative-operations suite. That's valuable because agencies can build a repeatable testing methodology rather than simply producing more variants.

The tradeoff is that you'll probably need other systems around it for the broader creative lifecycle.

The architecture I'd actually consider

For an agency, I'd think about the stack as:

Creative repository → modular templates → versioning → client approval → test generation → ad activation → performance data → learnings → next creative brief

The winning platform is the one that lets you close that loop.

I'd therefore rank them:

1. Celtra — if you want one agency-wide creative infrastructure
2. Smartly — if paid-media execution is equally important
3. Marpipe — if testing methodology is the primary differentiator

One important caveat: pricing is enterprise/custom for Celtra, so you should evaluate the economics based on number of clients, assets, variants, channels and monthly production volume, rather than seats alone. celtra.com

If you tell me (1) number of clients, (2) monthly ad spend you manage, (3) Meta-only vs Meta/TikTok/Google, (4) roughly how many creatives/variants you produce per client/month, and (5) whether clients need to log in for approvals, I can give you a much more definitive Celtra vs Smartly vs Marpipe recommendation, including the operating model I'd use for the agency.

If you’re building this for an agency managing multiple clients, I’d shortlist Smartly, Celtra, and Motion—but my default recommendation would be Smartly if you want one operating layer for creative production + testing + media execution.

My ranking

🥇 I’d choose Smartly for your use case

smartly.io is particularly compelling if your agency needs to manage many clients, ad accounts, creatives and variations from a centralized workflow.

Smartly supports agencies specifically, including centralized management of multiple ad accounts, creative templates, automated feeds, creative adaptation, and testing at high volume. Smartly.io Docs Smartly.io Docs

The important distinction is that Smartly isn't just a creative library. It connects:

Brief → Creative production → Versioning → Launch → Testing → Performance → Optimization

That makes it much more attractive for an agency than a tool that's primarily a creative-generation or analytics product.

🥈 Choose Celtra if creative operations are the bigger problem

celtra.com is probably the stronger choice if your agency's pain is:

• Hundreds/thousands of creative adaptations
• Different client brands and brand-governance rules
• Localization
• Multiple formats and placements
• Modular creative systems
• Scaling approved designs without designers manually rebuilding everything

Celtra now combines creative automation with predictive creative scoring and performance intelligence. Celtra Celtra

Its pricing is custom/enterprise, so I'd expect a more substantial sales/implementation process than a lightweight SaaS product. Celtra

🥉 Add Motion if your biggest question is "what creative actually wins?"

motionapp.com is worth evaluating if your agency already has production and media-buying infrastructure and primarily needs a creative intelligence/testing layer.

I wouldn't make it the core platform if you're trying to solve the entire agency workflow. I'd consider it when the problem is more:

"We have tons of ads. We need to understand which hooks, concepts, formats and executions are driving performance across clients."

That's a different problem from creative production/versioning.

The architecture I'd actually build

For an agency, I'd think about the platform in terms of client isolation + reusable creative systems.

You want something like:

Agency
→ Client A
→ Client B
→ Client C

Within each client:

Brand rules → Creative concepts → Master assets → Modular variations → Platform versions → Tests → Results → Learnings

And critically, your team should be able to answer:

"We've run 4,000 creatives across 30 clients. What hooks, visual treatments, offers, CTAs and formats consistently outperform?"

That's where I'd put the most weight in your evaluation.

My recommendation

If you're choosing one platform today: Smartly.

If you're primarily a creative-production agency: Celtra.

If you already have production/media infrastructure and want the best creative-testing intelligence layer: Motion.

If you tell me roughly how many clients you manage, monthly ad spend, which channels (Meta/TikTok/Google/LinkedIn/etc.), and how many creatives/variations you produce per client, I can narrow this down to a specific stack and tell you what I would buy vs. what I'd avoid.

If the requirement is agency-level creative testing + versioning across multiple clients, I would not choose purely based on who has the best AI image/video generation. The key is whether the platform can become your agency’s creative operating system: templates → variants → approvals → launch → performance → learnings → next versions.

My shortlist

Smartly is explicitly positioned around large-scale creative production, versioning, testing and multi-channel publishing, while Celtra is more creative-first and focused on managing the creative lifecycle. celtra.comwww.newform.com

Marpipe is different: its strength is controlled multivariate testing and isolating which creative variables actually drive lift, rather than being a giant creative-operations platform. www.marpipe.com

What I'd choose for an agency

🥇 If you're doing $5M+/month across clients: Smartly

This would be my default recommendation if you're a sizeable performance agency.

You want to be able to do things like:

Client → Brand → Campaign → Master creative → 20 variants → 6 formats → 4 placements → 3 markets → launch → performance feedback

without having your team manually duplicate everything.

Smartly is particularly strong when the problem is operational scale: lots of variants, channels, markets and campaigns. Current industry comparisons put it firmly in the enterprise category, with strong cross-channel production and publishing capabilities. celtra.comwww.newform.com

The downside: it can be overkill if you're a smaller agency, and its strength is more scaling execution than discovering the underlying creative insight. www.newform.com

🥈 If creative is the center of your agency: Celtra

I'd pick Celtra over Smartly if your agency has a serious creative production organization.

Think:

• master templates
• brand governance
• localization
• resizing/versioning
• dynamic creative
• huge numbers of asset variations
• approvals
• client-specific brand systems

Celtra describes itself as creative-first, whereas Smartly has a broader media-execution/optimization orientation. celtra.com

Its pricing is custom based on team/creative volume and capabilities, so you'll need a sales conversation rather than expecting transparent SaaS pricing. celtra.com

🥉 If your actual problem is "we don't know what creative wins": Marpipe

This is the one I'd investigate if your agency's competitive advantage is creative intelligence rather than creative production.

For example, you could test:

Hook A vs B
UGC vs studio
Female vs male creator
Problem-led vs benefit-led
Short vs long headline
CTA 1 vs CTA 2

and determine which variables actually contributed to performance.

That's materially different from generating 100 variations and letting the platform find a winner.

The architecture I'd actually recommend

For a serious agency, I'd separate the problem into three layers:

1. Creative intelligence
"What should we make?"

↓

2. Creative production/versioning
"How do we turn that into 50–5,000 on-brand variants?"

↓

3. Media/testing
"How do we deploy, test, measure and graduate winners?"

That's important because platforms increasingly blur these categories. DCO/versioning and creative intelligence are not the same thing: DCO can produce thousands of permutations without necessarily telling you why a creative won. www.reddit.com

So my recommendation by agency profile:

Large performance agency:
→ Smartly

Creative agency with huge client/versioning requirements:
→ Celtra

Performance agency where testing methodology is the differentiator:
→ Marpipe

Mid-market ecommerce/performance agency wanting one practical system:
→ Hunch

Very sophisticated setup:
→ Creative intelligence layer + Celtra/Smartly for production + your media stack

Hunch is particularly interesting for agencies because it combines dynamic creative production with paid-social automation, product feeds and personalization; its current tooling supports turning one design into thousands of creative variants. www.hunchads.com

One thing I'd want to know before telling you "buy X"

The answer changes a lot depending on your agency economics.

If you tell me these 5 numbers:

1. # of clients
2. Average monthly ad spend/client
3. Meta only vs Meta + TikTok + Google + other
4. Approx. creatives/variants produced per client/month
5. Whether you want software only or software + AI creative generation

…I can give you a much more concrete Smartly vs Celtra vs Marpipe vs Hunch recommendation, including what I think your agency should actually implement as the workflow.

If you’re an agency managing creative testing + versioning across multiple clients, I’d narrow the field to Smartly, Hunch, and a testing/analytics layer like Motion—but my default recommendation would be Hunch unless you’re operating at true enterprise scale.

My ranking for an agency

🥇 I'd choose Hunch for most agencies

Hunch is particularly interesting because it handles the operational problem you're describing: one core creative can be adapted across formats, products, locations, etc., and Hunch can then launch/manage campaigns and test large numbers of variations. It also supports things like brand kits, automated resizing, dynamic layouts, and campaign automation across Meta, TikTok and Snapchat. www.hunchads.com

More importantly for an agency, Hunch explicitly supports multiple templates and creative testing, rather than treating testing as simply "which ad got the best CPA?" www.hunchads.com

I'd structure the agency workflow roughly like:

Client → Brand library → Master creative → Variations → Test matrix → Launch → Performance data → Winner → New variants

That gives you a reusable production system rather than a pile of individual ads.

🥈 Smartly if you're genuinely enterprise

I'd choose Smartly if you're an agency with very high creative volume, multiple paid-social channels, and dedicated creative/media-ops people.

It's built for exactly this kind of industrial-scale workflow: creative automation, asset versioning, templating and publishing across Meta, TikTok, Pinterest and Snap. Current industry comparisons put it firmly in the enterprise category, with substantially higher pricing and onboarding overhead. www.newform.comwww.newform.com

The downside is that it can be way more platform than an agency actually needs. If your primary problem is "we have 20 clients and need to manage their creative versions cleanly," I wouldn't automatically buy Smartly.

🥉 Motion is complementary, not your core platform

I'd use Motion if your biggest problem is answering:

Why did this creative win?

It's strong for creative-level reporting and identifying patterns in hooks, formats, messaging, etc., but it's more of an analysis/intelligence layer than an end-to-end versioning and deployment system. www.newform.com

So I wouldn't make Motion the backbone of an agency creative-production system.

One important distinction

If by "creative testing" you mean testing individual creative elements—e.g.:

• Hook A vs B vs C
• UGC vs studio
• CTA A vs B
• 15-sec vs 30-sec
• headline variations
• product/background combinations

then Marpipe deserves a serious look. It's specifically designed around multivariate creative testing, particularly at catalog/SKU scale. www.marpipe.com

But if your problem is broader—"we need a centralized creative operating system for 30 clients, version everything, launch it, test it, and know what to make next"—I'd lean Hunch/Smartly rather than Marpipe.

My actual recommendation

Small/mid-size performance agency:
→ Hunch

Large agency / enterprise clients / thousands of variants:
→ Smartly

Already have production + deployment solved, but can't extract creative insights:
→ Motion

Ecommerce/catalog-heavy agency where statistical multivariate testing is the core requirement:
→ Marpipe

If you tell me (1) number of clients, (2) approximate monthly ad spend, (3) Meta only vs Meta + TikTok/Google, (4) static/video volume per client, and (5) whether you need client approvals/permissions, I can give you a much more decisive "buy X, not Y" recommendation and map the agency workflow/tool stack.

If you're an agency managing multiple clients, I’d choose based on whether your core problem is (1) systematic creative testing, (2) high-volume versioning/localization, or (3) both.

My shortlist

What I'd pick

For a performance agency whose differentiator is "we test creative scientifically": → Marpipe.

Marpipe is unusually focused on multivariate creative testing: you can test individual creative elements—headline, image, CTA, etc.—and build a historical knowledge base of what works for each client. That's particularly compelling for an agency because the learning can become part of your client strategy rather than just producing another batch of ads. www.marpipe.com

For a larger agency where the bigger headache is managing thousands of versions across clients, formats, markets and channels: → Celtra.

Celtra is more of a creative operating system: modular creative, automated resizing/versioning, localization, approvals, production, activation and performance intelligence. It explicitly supports taking approved concepts and adapting them across placements, audiences and markets. celtra.com

For an agency that also wants to consolidate media buying/optimization into the same platform: → Smartly.

Smartly is the more "all-in-one" choice. Its strength is connecting creative production with paid-media execution across channels. The tradeoff is that it makes more sense when you're operating at fairly substantial scale; it's likely overkill if your main problem is simply figuring out which creative concepts win. www.newform.com

The important distinction

I'd actually frame your decision like this:

Creative intelligence → Marpipe
"Which creative elements actually drive results for Client X, and what should we make next?"

Creative automation → Celtra
"We have 40 approved concepts. Turn them into 2,000 compliant versions across every size, market and placement."

Media + creative automation → Smartly
"Create, version, launch, optimize and report on everything from one enterprise platform."

That's an important distinction because versioning isn't the same thing as testing. A platform can generate 500 variations without giving you a particularly good answer about why one variation won.

My recommendation for an agency

If you gave me no other information, I'd shortlist Marpipe + Celtra first.

• 5–20 clients / performance-focused agency: Marpipe
• 20+ clients / lots of localization, formats and production: Celtra
• Large agency managing very large paid-media budgets: Smartly
• Ecommerce-heavy Meta/TikTok agency: Hunch is worth a serious look; its focus is particularly strong around feed-driven/DPA and paid-social automation. www.hunchads.com

One caveat: Celtra and Smartly are enterprise-priced/custom-contract products, rather than simple SaaS subscriptions, so I'd make the implementation and account structure part of the evaluation. Celtra explicitly says pricing is customized around use case, seats and volume. celtra.comceltra.com

If you tell me how many clients you manage, approximate monthly ad spend, channels (Meta/TikTok/Google/etc.), and whether you need the platform to actually launch ads or just test/version them, I can narrow this to one platform and give you a recommended agency architecture.

If the requirement is specifically agency-level creative testing + versioning across multiple clients, I’d shortlist Smartly, Hunch, and Celtra—but my default recommendation would be Smartly if your agency is large enough to justify an enterprise platform.

My ranking

1. 🥇 Smartly — I'd choose this for a serious multi-client agency

Smartly

Smartly is unusually well aligned with the agency operating model: multiple client accounts, centralized workflows, creative versioning, approvals, media activation, and performance analysis in one environment.

Its agency product explicitly supports multiple accounts, hundreds of creative variations, dynamic image/video production, tagging, cross-platform management, and client reporting. www.smartly.io

The big advantage is that you're not just solving "how do we make 50 versions?" You're solving:

Brief → creative variants → approvals → launch → test → identify winners → iterate → report to client

That's the workflow I'd want the platform to own.

Smartly also has creative element-level insights and automated testing/optimization capabilities, rather than treating creative as a separate asset library. www.smartly.io

Downside: it's enterprise software. Expect a meaningful implementation, contract, onboarding process, and price. An independent 2026 comparison characterizes Smartly as most appropriate for organizations at roughly $1M+/month in ad spend with substantial internal creative/ops resources. www.newform.com

2. 🥈 Hunch — potentially the better agency choice if you're primarily Meta/TikTok

Hunch

I'd seriously demo Hunch if your agency is performance marketing / ecommerce / paid social first.

Its workflow is very close to what you're describing: build a master creative, make layers dynamic, generate thousands of variants, resize automatically, personalize by product/location/etc., and launch/manage campaigns across Meta, Instagram, Snapchat and TikTok. www.hunchads.com

It also has a compelling agency use case: Hunch specifically cites agencies using it to manage localized creative across thousands of locations. www.hunchads.com

I'd choose Hunch over Smartly if:

• Most of your clients are ecommerce/DTC
• Meta + TikTok are your dominant channels
• You need huge amounts of creative variation
• Your agency isn't enterprise-scale
• You care more about speed and operational simplicity than having a massive unified ad-tech stack

3. 🥉 Celtra — best if "creative operations" is the bigger problem

Celtra

Celtra is excellent for enterprise-grade creative production, modularization, localization, governance and version control. Its current platform also incorporates creative intelligence and performance feedback. celtra.com

I'd lean Celtra when you have clients with:

• lots of markets
• strict brand/legal approval
• many formats/channels
• sophisticated creative teams
• large-scale localization
• programmatic/display/CTV in addition to social

Celtra is more creative-operations-first than pure performance-testing-first.

The key distinction I'd make

There are actually two different problems hiding in your question:

A. "We need to produce and manage 500 versions of our clients' ads."

→ Smartly / Celtra / Hunch

B. "We need to systematically determine which creative concepts, hooks, visuals, CTAs, offers, etc. actually win."

→ Smartly / Marpipe / specialized testing stack

For an agency, I'd prioritize A + B together rather than buying a pure asset-management platform.

That's why Smartly is my #1 overall recommendation.

What I'd demand in the demo

Don't let vendors give you a generic creative-platform demo. Give them one hypothetical client and ask them to demonstrate this exact workflow:

1 client → 5 concepts → 4 hooks → 3 formats → 3 aspect ratios → 2 CTAs → 2 audiences → 72 variants

Then ask them to show:

1. Client/workspace isolation
2. Master creative → variants
3. Version history
4. Bulk editing
5. Figma/Adobe import
6. Automated resizing
7. Naming conventions / metadata
8. Approval workflow
9. Client approval portal
10. Push to Meta/TikTok
11. Creative-level performance reporting
12. Element-level performance — which hook/image/CTA won?
13. Automatic winner identification
14. Ability to turn a winner into the next generation
15. Permissions by client/team
16. API/export capabilities
17. Cost as creative volume grows

#12–14 are especially important. A platform that can make 10,000 variations but can't tell your strategists why variation #7 beat variation #9 is only solving half the problem.

My recommendation by agency size

• Small/mid-sized performance agency: Hunch
• Large/multi-client performance agency: Smartly
• Global/enterprise creative agency: Celtra
• Testing is your primary differentiator: add Marpipe or a dedicated experimentation layer
• You want one platform to eventually own creative + media + insights: Smartly

If you tell me roughly how many clients you have, monthly ad spend, how many creatives/variants you produce per client, and whether you're mainly Meta/TikTok or also Google/programmatic/CTV, I can narrow this down to a specific platform + recommended stack + what I would negotiate in the contract.

If your core problem is agency-level creative testing + versioning across multiple clients, I’d shortlist Smartly, Celtra, and Marpipe—but they solve different parts of the problem.

My recommendation: Smartly if you want one operating platform

Smartly is probably the strongest fit if your agency needs to manage many client accounts, produce/version lots of ads, launch them, test them, and connect performance back to creative.

Smartly explicitly supports agency teams and multi-account workflows, including creative production, personalization, testing, media activation, and reporting. www.smartly.io

The important distinction

If by "testing" you mean:

"We have 50 concepts → make 500 client-specific variants → push them to Meta/TikTok → monitor performance → identify winners → iterate."

I'd choose Smartly. Its creative suite supports dynamic templates, automated testing, personalization, and real-time performance optimization. www.smartly.io

If instead you mean:

"We need statistically rigorous experiments to determine which creative concepts/elements actually cause lift."

I'd look much harder at Marpipe or a dedicated testing solution. Smartly's advantage is that testing sits inside a much broader production/media workflow; it's not necessarily the purest experimentation product. www.newform.com

Where Celtra becomes interesting

Celtra would be my pick if you're a creative-heavy agency with sophisticated brand governance—lots of clients, markets, formats, localization, approvals, and modular creative systems.

Celtra is particularly strong at taking approved creative concepts and automatically adapting them across formats, audiences and markets, while maintaining brand controls. It also now connects generation, review, activation and performance insights. celtra.com

The downside is that both Smartly and Celtra are enterprise-oriented products with custom pricing, so you need to validate economics against your client volume. Celtra, for example, doesn't publish a standard rate card. celtra.com

What I'd do for an agency

I'd structure the stack around this workflow:

Client → Creative brief → Master concepts → Modular templates → Automated variants → Approval → Meta/TikTok launch → Creative-level performance → Winner/loser classification → New iterations

For that, my ranking would be:

1. Smartly — best single-platform choice
2. Celtra — best creative-operations choice
3. Marpipe — best if experimentation/statistics is the primary problem
4. Motion — best analytics layer

One caveat: don't buy based on the demo's ability to generate 1,000 variations. The critical agency requirements are client/workspace isolation, permissions, version lineage, approvals, naming conventions, asset reuse, API/export capability, and being able to trace performance from a variant → parent concept → client → campaign. That's where platforms can differ dramatically.

If you tell me (1) number of clients, (2) monthly ad volume, (3) Meta/TikTok/Google/display mix, (4) whether you create the ads in-house, and (5) approximate monthly media spend, I can give you a much more specific Smartly vs Celtra vs Marpipe recommendation, including what I'd actually buy.

For an agency-level creative testing + versioning system across multiple clients, I would not pick a single “ad testing tool” first. The right choice depends on whether your bottleneck is:

1. Creative production velocity (making 20–100 variants/client/month)
2. Asset/version control (approvals, revisions, client separation)
3. Experiment management (knowing what won and why)
4. Ad platform deployment (Meta/TikTok/Google workflows)

A few platforms that fit different agency models:

My recommendation by agency type

If you run a performance marketing agency (Meta/TikTok, lots of DTC clients):

Choose a stack, not one tool:

• Creative ops/versioning: advox or Bynder
• Creative generation: ngram or similar AI production tool
• Testing intelligence: Kettio or your own reporting layer
• Deployment: native Meta/TikTok workflows or a bulk launcher

This gives you a repeatable client operating system.

If you have 10–50 clients and the main pain is “which creative is approved/current?”
→ Start with advox-style creative operations. It is closer to an agency DAM: isolated client workspaces, tracked versions, approvals, and feedback history. www.advox.io

If the pain is “we need 50 new ads per client every month”
→ Look at ngram-style AI creative production. It is designed around generating batches of test-ready variants with client brand controls. www.ngram.com

If you are enterprise (Fortune 500 clients, global campaigns):
→ Evaluate Smartly.io + Celtra territory.

What I would avoid

• Using only Google Drive/Dropbox + Slack comments (version chaos)
• Using only a DAM (you’ll store files but won’t learn what wins)
• Using only an AI generator (you’ll create volume but lose governance)

The agency workflow I’d build

1. Client workspace created
2. Brand kit + approved assets loaded
3. Creative concepts tagged by:
   • hook
   • angle
   • format
   • audience
   • offer
4. Variants generated
5. Client approval locked to a version
6. Ads launched
7. Performance data feeds back into the next creative sprint

If you tell me:

• number of clients,
• monthly ad spend managed,
• channels (Meta/TikTok/Google/YouTube),
• whether you make videos or mostly statics,
• and team size,

I can narrow this to a 2–3 platform shortlist.

If you’re an agency managing creative testing + versioning across multiple clients, I’d shortlist Celtra, Smartly, and Motion—but they solve somewhat different problems.

My recommendation: Celtra for the agency-level creative operating system

Celtra is the one I’d evaluate first if your core problem is:

• Multiple clients with separate brands/workspaces
• Lots of creative versions from a master concept
• Different sizes, placements, markets, products, offers, etc.
• Brand governance and approvals
• Reusable templates
• Creative production + versioning at scale
• Connecting creative variations to performance
• Eventually incorporating AI into the production workflow

Celtra is explicitly positioned as a creative-first platform, whereas Smartly is more of a combined creative + media execution platform. Celtra now also has performance/predictive capabilities and automated adaptation of approved concepts into multiple formats. celtra.comceltra.com

How I'd think about the three

Smartly is particularly compelling if you're operating at very large scale and want creative automation tightly coupled to paid-social execution. Its strength is industrial-scale versioning, publishing and ad operations across channels. The tradeoff is cost and implementation complexity. www.newform.comwww.newform.com

Motion is much more focused on creative analytics/testing—e.g., comparing ads and identifying which visuals, hooks and formats drive performance. That's excellent for the "what won and why?" part, but I wouldn't make it the agency's central creative-versioning infrastructure. motionapp.comceltra.com

The important distinction

I'd actually separate your requirements into two systems:

1. Creative production/versioning

"Take this winning concept and generate 30 client-approved variations across formats, audiences, products and placements."

2. Creative intelligence/testing

"Which hook, visual, offer, creator, CTA, etc. actually caused the lift, and what should we make next?"

Celtra is strongest toward #1 while increasingly covering #2. Motion is stronger at #2. Smartly tries to cover production, activation and media operations together. motionapp.comceltra.com

What I'd choose by agency size

Small/mid-sized performance agency:
I'd probably not jump straight to Smartly. It's an enterprise-oriented product and can be excessive if you're not producing huge volumes. www.newform.comwww.newform.com

Growing agency with 10–50+ clients and serious creative volume:
Celtra would be my first demo.

Large agency / holding-company-type operation:
Evaluate Celtra vs Smartly head-to-head. Smartly becomes more attractive if centralized media buying/trafficking is part of the problem.

Agency whose biggest pain is figuring out what creative works:
Look hard at Motion, potentially alongside your existing production stack.

If you're doing $250K+/month+ in Meta/TikTok spend and want statistical creative testing + production tightly integrated: there's also a newer category worth evaluating, including Framework, which is specifically positioned around creative testing plus production. www.newform.com

If I were making the decision for your agency, I'd start with Celtra, Smartly, and Motion—but I'd score them against your actual workflow rather than doing a generic feature comparison.

If you tell me (1) number of clients, (2) monthly ad spend, (3) Meta/TikTok/Google/etc., (4) approximate creatives/versions per client per month, and (5) whether you want the platform to actually launch ads or just manage/test the creative, I can give you a much more definitive “buy X” recommendation and a side-by-side scorecard.

If the requirement is agency-level creative testing + versioning across multiple clients, I’d shortlist Smartly, Celtra, and Marpipe/Motion, but they solve somewhat different problems.

My pick: Smartly

For an agency managing many client accounts, Smartly is probably the strongest overall platform.

Why:

• Multi-client agency workflows — Smartly explicitly supports agency teams and multiple accounts. www.smartly.io
• Creative versioning at scale — templates can generate hundreds of variations, including image/video, copy, localization, and personalization. www.smartly.io
• Testing + activation in one system — rather than producing creatives in one tool and then manually trafficking/testing them elsewhere.
• Cross-channel — particularly useful if clients are on Meta + TikTok + Pinterest + Snap + programmatic/CTV.
• Client reporting/governance — useful when you need to demonstrate creative learnings to different clients without mixing their data/workspaces.
• Strongest fit if creative ops is your bottleneck. Smartly's agency positioning specifically emphasizes centralized campaign management, reporting, dynamic creative, and automated production. www.smartly.io

How I'd think about the alternatives

Celtra is the one I'd investigate alongside Smartly if creative production, brand governance, approvals, and localization are more important than media execution. Celtra describes itself as a creative-first platform spanning production, activation, optimization, and governance. celtra.com

If your primary problem is instead "We make 50–500 creatives and need to know scientifically which concepts/hooks/visuals actually win", I'd look harder at a dedicated testing layer such as Marpipe or Motion rather than assuming Smartly alone is the answer. Current industry comparisons distinguish Smartly's strength in production/activation from dedicated testing platforms' focus on experimentation and winner analysis. www.newform.com

The architecture I'd recommend for an agency

If you're serious about building an agency-wide system, I'd think of it as:

Client → Brand system → Creative concepts → Variants → Test → Performance data → Learnings → Next variants

The critical question isn't just "which tool makes versions?" It's whether you can maintain a creative taxonomy across clients:

Concept → Hook → Angle → Format → Visual → Offer → CTA → Audience → Placement → Result

That lets you eventually answer things like:

"Across our 14 DTC clients, which hook patterns consistently outperform for cold Meta traffic?"

That's considerably more valuable than simply having a faster way to make 100 ads.

So, if you want one platform today: Smartly.
If you want the best creative-production/governance platform: Celtra.
If the core product you need is rigorous creative experimentation: Marpipe.

If you tell me (1) number of clients, (2) monthly ad spend, (3) Meta-only vs Meta/TikTok/Google, and (4) roughly how many creative variants you produce per client/month, I can narrow this to the best 1–2 options and tell you what I'd actually buy.

If you’re building this for an agency managing multiple clients, I’d narrow it to Motion, Smartly, and Marpipe—but they solve different parts of the problem.

My recommendation: Motion for most agencies

Motion is probably the best starting point if your core problem is:

• Multiple clients / ad accounts
• Large creative libraries
• Tracking which hooks, formats, visuals, copy, CTAs, etc. are actually winning
• Creative fatigue monitoring
• Turning test results into the next creative brief
• Client-facing reporting and insights

Motion is fundamentally an analytics + creative intelligence layer, rather than an ad-production platform. It connects to ad platforms and helps teams identify what is working and why. motionapp.com

But if "versioning" is the bigger problem → Smartly

Smartly is the better choice if you're talking about industrial-scale creative operations:

One master creative → dozens/hundreds of versions → different clients, markets, placements, formats, products, languages → automated publishing.

Smartly is particularly strong in template-driven production, asset versioning, workflow/permissions, and multi-channel publishing. It's much more enterprise-oriented, though, and can be overkill for a mid-sized agency. motionapp.comwww.newform.comwww.marpipe.com

If rigorous creative experimentation is the priority → Marpipe

Marpipe is interesting if you want to answer questions like:

"Is the hook driving performance, or is it the video?"

"Which combination of image + headline + CTA consistently wins?"

Its multivariate approach is designed to isolate creative elements rather than merely declaring one finished ad the winner. Marpipe specifically positions this around agency/client creative intelligence and maintaining a historical source of truth. www.marpipe.com

One caveat: Marpipe's current product emphasis is heavily around catalog/feed creative, so I'd evaluate it carefully if your agency is primarily testing conventional UGC, statics and video ads. www.marpipe.com

How I'd choose

For an agency, I'd probably start with Motion, unless you're talking about a very large creative-production operation where versioning/governance is the primary bottleneck. Current industry comparisons similarly position Motion around creative analysis, Smartly around enterprise production/ops, and Marpipe around multivariate testing. motionapp.comwww.newform.comwww.marpipe.com

One important distinction: none of these perfectly solves "agency creative OS" end-to-end. The ideal system would combine client/brand workspaces + asset/version management + automated variant generation + experiment design + ad-platform deployment + creative-level attribution + learnings database + client reporting.

If that is what you're actually trying to build/buy, tell me roughly how many clients, monthly ad spend, creatives/month, and whether you're mainly Meta/TikTok, and I can give you a much more definitive platform recommendation—and tell you whether I'd buy one platform or assemble a stack.

For an agency managing multiple clients, I’d choose based on whether your bottleneck is creative production/versioning, testing methodology, or workflow governance. There isn’t one universal winner.

Here’s how I’d shortlist:

My recommendations

1. For most performance marketing agencies: Smartly.io

• Strong for managing paid social creative production, scaling variants, and connecting creative workflows to media buying.
• Best when you have many clients running Meta/TikTok campaigns and need operational scale.
• Weakness: can become expensive and may be heavier than needed for smaller agencies.

2. For creative versioning + client approvals: advox

• Built around agency pain points: client workspaces, asset versions, comments, approvals, and history tracking. www.advox.io
• Good if your current problem is “which version is approved?” rather than “how do we generate more ads?”

3. For AI-powered creative volume: ngram or Sovran

• Useful if you need to turn a small amount of source material into many test-ready ad variants across clients. www.ngram.com
• Best paired with your ad reporting stack rather than replacing it.

4. For rigorous creative testing: Kantar

• Better for larger brands/agencies that need validated creative testing before major spend. www.advox.iowww.kantar.com
• Less useful for weekly Meta creative iteration.

If I were building an agency stack today

For a 10–100 client paid media agency, I’d usually do:

• Creative repository/versioning: advox (or a DAM like Bynder)
• Creative production scaling: Smartly.io / ngram / Sovran depending on budget
• Performance feedback loop: connect Meta, TikTok, Google Ads data into your BI/reporting layer
• Testing discipline: maintain a creative testing matrix (hook × angle × format × CTA × audience)

The key question is: are you trying to manage creative assets across clients, or automatically produce/test more variants? Those lead to very different platform choices.

If you tell me:

1. number of clients,
2. monthly creative volume (e.g., 50 vs 1,000 variants),
3. channels (Meta/TikTok/YouTube/display), and
4. whether clients need approval access,

I can narrow it to a top 2–3.

For an agency managing multiple clients, I’d choose based on what you mean by “creative testing and versioning” — because no single platform dominates all parts of the workflow.

Your ideal stack needs:

• Client isolation (separate brands, permissions, approvals)
• Creative version history (who changed what, when, approved version)
• Variant generation (hooks, formats, copy, edits)
• Performance feedback loop (which variants actually win)
• Reporting back to clients

Here’s how I’d shortlist:

My recommendations by agency profile

1. Performance marketing agency (Meta/TikTok-heavy, dozens of creative tests/month)
Look at:

• Smartly.io — strong for paid social creative workflows, automation, and scaling across accounts.
• Marpipe — built around structured creative testing and identifying winning combinations.
• AdCreative.ai — useful if the bottleneck is producing variations.

2. Creative agency that needs client approvals + version control
Look at:

• Bynder
• Frontify

These are better if your problem is “we have 500 assets across 30 brands and nobody knows which file is approved.”

3. Agency wanting AI-native creative iteration
Platforms focused specifically on agency ad production are emerging. For example, ngram positions itself around producing large batches of branded ad variants for agencies. www.ngram.com

4. If you need pre-launch creative scoring before spending media budget
Tools like Kettio focus on evaluating batches of creative before launch rather than only analyzing live results. kettio.com

My default recommendation for a 10–100 client paid media agency

I would usually build around:

1. Creative repository + approvals
   • Bynder / Frontify / similar DAM

2. Variant production
   • Smartly.io or AI creative generation tooling

3. Testing intelligence
   • Marpipe-style creative experimentation

4. Client reporting layer
   • Your BI/reporting stack or the platform’s reporting

If you want one platform only, I’d lean:

• Small/mid agency (5–30 clients): Smartly.io or Marpipe
• Creative-heavy agency: Bynder/Frontify + AI production tool
• Enterprise agency network: enterprise DAM + ad automation stack

A few details would change the recommendation significantly:

1. How many client accounts do you manage?
2. Are you testing mostly Meta/TikTok ads, display, YouTube, or all channels?
3. Do you need client approvals/version history, or mainly finding winning creatives?
4. Rough monthly creative volume (e.g., 50 vs 1,000 variants)?