Answers that name a competitor

For an ecommerce store with limited developer resources, I’d lean toward Criteo Commerce Growth, specifically its retargeting/GO setup.

• Why Criteo: it is designed for ecommerce retargeting across the open web, social, video, and in-app environments, rather than restricting you to one ad network. Criteo Criteo
• Low implementation burden: if your store platform is supported, Criteo says you can install its OneTag and product feed without editing site code through partner integrations. Criteo Help Center
• Dynamic product ads: it can personalize ads based on products shoppers viewed, carted, or are predicted to want. Criteo
• Automation: Criteo GO handles much of the targeting, bidding, and campaign optimization, which is useful if you don't have someone dedicated to paid media. Criteo

What I'd choose

Best for minimal dev + broad cross-site retargeting: Criteo Commerce Growth/GO.

Best if you primarily want Google traffic: Google Ads remarketing via Google Tag Manager/GA4. Google supports dynamic product-specific remarketing, and GA4 can sometimes use an existing installation without additional site-code changes. Google for Developers

Best if you specifically want Meta/Instagram: Meta Pixel + Conversions API, but I'd consider this a second channel rather than the main solution for cross-site retargeting.

One caveat: Criteo still requires your product catalog/feed and OneTag to be set up, so "limited dev" doesn't mean zero setup. Criteo

If you tell me whether you're on Shopify, WooCommerce, BigCommerce, or another platform, I can recommend the lowest-effort setup and roughly how much developer work it should require.

For an ecommerce store with limited developer resources, you’ll usually want a low-code customer data/advertising tool rather than building custom tracking pipelines. The best choice depends on your traffic volume, ad channels, and how much control you need.

Good options for limited dev teams

• ads.google.com + tagmanager.google.com

• Best starting point for many stores.
• Lets you deploy conversion tracking and remarketing tags with minimal engineering help.
• Works well with Google Display, Search remarketing, and YouTube audiences.
• facebook.com + facebook.com

• Good if your customers are active on Facebook/Instagram.
• Shopify and other ecommerce platforms often have simple integrations.
• klaviyo.com

• Best if you want retargeting through email/SMS plus customer segmentation.
• Often easier than ad platforms for lifecycle marketing.
• adroll.com

• Built specifically around retargeting and cross-channel campaigns.
• Useful for teams that want a more managed solution.
• shopify.com (if you’re on Shopify)

• Can reduce setup work by using Shopify’s ecosystem.

My usual recommendation for a small ecommerce team

1. Install Google Tag Manager.
2. Add: - Google Ads remarketing/conversion tracking
3. Meta Pixel + Conversions API if possible
4. Use your ecommerce platform’s native integrations where available.
5. Add a customer engagement tool like Klaviyo if repeat purchases matter.
6. Only move to a customer data platform (CDP) like segment.com when you have enough traffic/data complexity to justify it.

A few questions would change the recommendation:

• What ecommerce platform are you using (Shopify, WooCommerce, Magento, custom)?
• Which channels do you want to retarget on (Google, Meta, TikTok, display networks)?
• Roughly how much monthly traffic or ad spend do you have?

If your main requirement is “someone abandons checkout → automatically retarget them across multiple ad networks/channels”, my first choice would be adroll.com.

My ranking

Why AdRoll stands out: it specifically supports a “Convert Cart Abandoners” workflow that can retarget people who added products to their cart and left, with ads across the web, Facebook, Instagram, Pinterest, and TikTok. AdRoll Help Center AdRoll Help Center

It can also combine email + advertising around abandonment, and its ecommerce integrations can automatically use your product feed for dynamic ads. AdRoll AdRoll

adroll.com

When I'd choose Criteo instead

If you're doing substantial ecommerce volume and care more about sophisticated bidding/commerce optimization than simplicity, I'd investigate criteo.com. Criteo's current offering combines open-web, social, video and in-app inventory and uses commerce-intent signals for dynamic retargeting. Criteo

One important distinction

If by “multiple ad networks” you mean literally one DSP buying across lots of independent exchanges, rather than simply managing Meta/TikTok/Pinterest + display from one interface, Criteo is probably the more sophisticated choice.

If you mean:

“I don't want to build separate campaigns in Meta, TikTok, Pinterest and display just to recover abandoned checkouts.”

AdRoll is the better fit.

For a typical Shopify/WooCommerce ecommerce store, I'd start with AdRoll, set up a dedicated checkout abandoner audience, use dynamic product ads, exclude purchasers immediately, and apply a short frequency cap so you don't annoy high-intent visitors. AdRoll supports Shopify, WooCommerce, BigCommerce, Wix and PrestaShop integrations. AdRoll AdRoll

If you tell me your monthly site traffic/revenue and whether you're on Shopify, WooCommerce, etc., I can narrow this down to the best 2–3 options and compare pricing, network coverage, attribution, and likely ROI.

If your priority is retargeting checkout/cart abandoners across multiple ad networks from one platform, I’d shortlist these:

🥇 My pick: AdRoll

AdRoll is particularly aligned with what you're describing. It can build retargeting audiences from site/ecommerce activity and coordinate campaigns across the web, Facebook, Instagram, TikTok, and Pinterest. Its ecommerce tooling specifically supports abandoned-cart recovery. www.adroll.com

It also has cross-channel attribution that can bring data from Google Ads, Meta, TikTok, Pinterest, Amazon Ads, Microsoft Ads, LinkedIn, Snapchat, X, etc. into one reporting view. help.adroll.com

So a practical setup could be:

Checkout abandoned → AdRoll audience → dynamic product ad → web/display + Meta + Instagram + TikTok → stop ads immediately after purchase.

AdRoll's automated recipes support exit criteria such as completing a purchase, which is exactly the sort of suppression logic you want for abandoned-checkout campaigns. help.adroll.com

🥈 Criteo if you're bigger

Criteo Commerce Growth is probably the stronger choice if you have substantial traffic and ad spend. It offers personalized retargeting across open web, mobile, social and video, with AI-driven bidding and dynamic creative. www.adroll.comwww.criteo.comhelp.go.criteo.com

Criteo GO can manage Display, Native, Video and Social within a single campaign and automatically allocate budget between active channels. help.go.criteo.com

One caveat: its current Commerce Growth social integration specifically documents Meta (Facebook/Instagram), so if your definition of "multiple ad networks" means Google + Meta + TikTok + Pinterest + other networks all under one campaign, AdRoll is the cleaner match. help.criteo.com

What I'd choose by situation

• Small/medium ecommerce store: AdRoll
• $50k+/month ad spend and large product catalog: Criteo
• You want maximum control and have a sophisticated marketing team: Google Ads + Meta Ads separately
• You specifically want one dashboard/orchestration layer across lots of networks: AdRoll

One important distinction: no platform can literally buy inventory across every ad network. Google, Meta, TikTok, Amazon, etc. have their own walled gardens. The advantage of a platform like AdRoll/Criteo is that it can unify the audience, creative, optimization and much of the measurement across the inventory it has access to.

If you tell me your ecommerce platform (Shopify/WooCommerce/custom), monthly traffic, and approximate monthly ad spend, I can narrow this down to the best 2–3 options and compare pricing, network coverage, checkout-abandoner targeting, and attribution.

For a combined email + paid retargeting campaign stack, I’d shortlist platforms that can take your email audience/behavior data and activate it across ad networks (Google, Meta, LinkedIn, programmatic, etc.). The best fit depends on whether you want a marketing automation hub, a dedicated retargeting layer, or a first-party audience sync tool.

Best overall options

1. AdRoll — best dedicated cross-channel retargeting platform

Best for: ecommerce, SMB/mid-market teams wanting email + display + social retargeting.

Why consider it:

• Syncs customer/email lists into advertising audiences.
• Runs display and social retargeting campaigns alongside email marketing.
• Good for abandoned cart, dormant customer, and lifecycle campaigns.
• Has integrations with common ecommerce and email platforms. Campaign Monitor

Typical setup:

• ESP segment: “opened email but didn’t purchase”
• Push segment → AdRoll audience
• Run ads for 7–30 days
• Suppress converters automatically

2. ActiveCampaign — best if email automation is the center

Best for: teams already using email journeys and wanting ad audiences connected to lifecycle stages.

Why consider it:

• Connects customer data across email, SMS, and advertising channels.
• Supports audience syncing with major ad platforms such as Facebook, Google Ads, TikTok, and LinkedIn. ActiveCampaign

Good use cases:

• Lead nurturing: - Email sequence → no response → add to paid audience
• Lead becomes sales-qualified → remove from acquisition ads
• Customer lifecycle: - Trial users → upgrade campaigns
• Churned users → win-back ads

3. Adobe Marketo Engage — best for enterprise B2B

Best for: large sales teams, ABM, long buying cycles.

Why consider it:

• Syncs marketing audiences into paid media systems.
• Supports integrations with major ad networks including Google, Facebook, and LinkedIn.
• Allows targeting based on engagement stage and buyer lifecycle. Experience League

Typical workflow:

• MQLs → LinkedIn + Google audiences
• Website visitors → nurture ads
• Closed customers → exclusion lists

4. Opensend — best for ecommerce visitor identification + retargeting

Best for: DTC brands trying to recover anonymous or high-intent visitors.

Why consider it:

• Connects with email marketing platforms.
• Supports retargeting through email, ads, and SMS.
• Designed around identifying and re-engaging high-intent shoppers. Opensend Opensend

5. illumin — best for programmatic + email audience activation

Best for: advertisers wanting to turn email segments into broader open-web campaigns.

Why consider it:

• Lets advertisers connect email audiences to programmatic campaigns.
• Supports behavioral audience segmentation and coordinated journeys. Illumin

My recommendation by scenario

A strong combined campaign architecture

1. Email provider creates behavioral segments:

• Opened but didn’t click
• Clicked but didn’t convert
• Viewed pricing/product pages
• Existing customers
• Lapsed customers
• Audience sync layer pushes segments to:

• Google Ads Customer Match
• Meta Custom Audiences
• LinkedIn Matched Audiences
• Display/programmatic networks
• Campaign logic:

• Email gets first touch
• Ads reinforce the message
• Purchasers are suppressed from acquisition campaigns
• High-value customers enter upsell flows

If you tell me your email provider (Klaviyo, HubSpot, Mailchimp, Salesforce Marketing Cloud, etc.), ad networks (Meta/Google/LinkedIn/programmatic), and whether this is B2B or ecommerce, I can narrow it to 2–3 platforms and a recommended stack.

If you want to create dynamic product retargeting ads from catalog feeds, you’re usually looking for a catalog ad / dynamic product ad (DPA) platform. The right tool depends on whether you need creative generation, feed management, or ad-channel execution.

Tools to consider

• Meta Platforms Catalog Ads (inside Meta Ads Manager) — best if your main channels are Facebook and Instagram. It uses a product catalog plus user behavior signals to show shoppers products they viewed, added to cart, or are likely to buy.
• campaignbuilder.io — useful for turning product feeds into dynamic catalog creatives and distributing them across channels like Meta, Google, and TikTok. It supports feed connections, templates, and automated creative generation. Campaign Builder
• feedforce.co — focused on generating branded catalog ads at SKU scale from feeds (images, prices, offers, templates, etc.). Good for large catalogs where manually designing ads is impractical. FeedForce
• neubids.com — built specifically around feed-driven retargeting, combining product feeds, intent signals, and dynamic layouts. NeuBids
• highstreet.io — more focused on feed optimization and distribution for retargeting across Google, Facebook, and other channels. Highstreet.io

For a typical ecommerce setup

A common stack looks like:

1. Product catalog/feed source

• Shopify, WooCommerce, ERP, PIM, CSV/XML/API feed
• Feed management

• Clean titles, images, prices, availability, categories, IDs
• Dynamic creative layer

• Generate ad templates: - “You viewed this product”
• “Back in stock”
• “Price drop”
• “Complete your look”
• “Best sellers”
• Ad platforms

• Meta Catalog Ads
• Google Dynamic Remarketing / Performance Max
• TikTok Catalog Ads
• Pinterest Catalogs

If you tell me:

• your ecommerce platform (Shopify, Magento, custom, etc.)
• ad channels (Meta, Google, TikTok, Criteo, etc.)
• catalog size (hundreds vs. millions of SKUs)

I can narrow it down to the best-fit tools.

For sequential retargeting creative (showing different ads as prospects move from awareness → consideration → intent → conversion), the “best” platform depends heavily on your funnel type. There isn’t one universal winner.

My shortlist:

hawkemedia.com

My default recommendation by funnel

B2B SaaS / high-consideration purchase

1. LinkedIn → first-party audience + account targeting
2. Google Search/YouTube → capture intent and reinforce proof
3. CRM sync → exclude converted leads and change messaging

Example sequence:

• Days 0–7: “Here’s the problem + category education”
• Days 8–21: “Here’s proof: case studies, benchmarks, customer stories”
• Days 22–45: “Book demo / talk to expert / evaluation offer”

LinkedIn is especially useful when you need to move multiple stakeholders through a buying process. www.singlegrain.com

Ecommerce / consumer

1. Meta
2. Google Performance Max + YouTube
3. Email/SMS audience sync

Example:

• Viewed product → product benefits
• Added to cart → objections + reviews
• Abandoned checkout → urgency/incentive

Meta-style custom audiences make this type of funnel relatively straightforward. hawkemedia.comcoinis.com

Enterprise ABM
I’d look at:

• LinkedIn
• The Trade Desk
• Google Display/YouTube
• CRM-driven orchestration

The key is not the channel; it’s having audience state changes:

• anonymous visitor
• engaged visitor
• known lead
• sales-qualified lead
• opportunity
• customer

Each state gets different creative. Sequential retargeting works because you stop showing “buy now” ads to people who are still learning and stop educating people who are ready to talk. www.uprawmedia.com

If I were building a modern stack from scratch:

• SMB/mid-market: Meta + Google + CRM audiences
• B2B SaaS: LinkedIn + Google + CRM sync
• Enterprise: LinkedIn + programmatic + account-based orchestration

The biggest performance lift usually comes from the creative architecture (what message comes first, second, third), not from swapping ad platforms. www.consult.tv

If your goal is to retarget existing mobile app users across both the open web and major social platforms, you'll typically need a combination of:

1. An MMP (Mobile Measurement Partner) to build audiences and measure attribution.
2. Social ad platforms (Meta, TikTok, Google, Snap, etc.) for their own ecosystems.
3. An independent DSP or retargeting platform to reach users across the open web and in-app inventory.

Here's how the major options compare.

If you're an app-first company

These are the strongest choices:

• Remerge – One of the best-known platforms focused specifically on app retargeting after Apple's ATT changes. It integrates with major MMPs and specializes in re-engaging existing app users across mobile web and in-app inventory. Hellyeah RocketShip HQ
• Moloco – Excellent if you have significant scale and want machine-learning optimization around ROAS and lifetime value. AllAspect
• Liftoff – Popular for gaming, fintech, and subscription apps.

If you need open web + social together

There isn't a single platform that truly owns every channel.

A common enterprise stack looks like:

• Meta → Facebook & Instagram
• Google → YouTube + Display Network
• TikTok → TikTok
• Remerge or Moloco → open web + in-app exchanges
• MMP (AppsFlyer or Adjust) → attribution and audience syncing

This gives you nearly complete coverage.

Don't forget the MMP

An MMP is what connects your app events to your ad platforms.

The leaders are:

• AppsFlyer
• Adjust
• Singular
• Kochava
• Branch (for deep linking plus attribution)

These platforms integrate with most major retargeting partners and help manage attribution, audience creation, and deep linking. Criteo Help Center Ad Growth Tools Singular

Recommended stacks by company size

Startup (<$100k/month ad spend)

• AppsFlyer or Adjust
• Meta
• Google Ads
• TikTok

Growth ($100k–$1M/month)

• AppsFlyer
• Meta
• Google
• TikTok
• Remerge or Moloco

Enterprise ($1M+/month)

• AppsFlyer
• Meta
• Google
• TikTok
• Remerge
• The Trade Desk (for CTV, display, and broader omnichannel campaigns)

My recommendation

If you're looking for the most effective combination today:

• AppsFlyer + Remerge + Meta + Google + TikTok

This setup covers:

• Existing app user retargeting
• Mobile web
• In-app advertising inventory
• Facebook and Instagram
• YouTube
• TikTok
• Deep linking back into your app
• Cross-channel attribution

It's a common stack for consumer apps, ecommerce apps, fintech, travel, and subscription businesses because it balances broad reach with reliable measurement in the post-ATT privacy landscape. Hellyeah RocketShip HQ Ad Growth Tools

If you want to retarget existing mobile app users across the open web + social platforms, the best software depends on your scale, app category, and whether you need a DSP, audience management, or just channel activation.

Best overall stack for most mobile apps

1. Mobile measurement + audience platform (foundation)

Start with a mobile attribution platform that can create behavioral audiences and sync them to ad channels:

• AppsFlyer — strong for building segments from installs, in-app events, LTV, churn risk, and pushing audiences to Meta, Google, TikTok, and other partners. AppsFlyer
• Adjust — similar role, with audience segmentation, deep links, and activation integrations for retargeting campaigns. Adjust Help Center

Use cases:

• “Users who installed but never completed onboarding”
• “Users who purchased before but haven’t returned in 30 days”
• “High-value users who stopped opening the app”

Best ad platforms by channel

Social retargeting

• facebook.com — usually the first channel to test because Meta has strong first-party identity signals through Facebook and Instagram. Use Custom Audiences plus app events/conversion integrations. Hellyeah
• ads.tiktok.com — useful if your audience is active on TikTok; works best with strong creative testing and event signals.

Open web / in-app inventory

• Remerge — one of the more mobile-focused retargeting DSPs, designed specifically for re-engaging app users across mobile inventory. Remerge
• Criteo — useful for commerce apps needing dynamic product retargeting across web and mobile environments. Criteo Help Center
• Google Ads — good for reaching users through Google inventory, including Display and YouTube placements, with app remarketing capabilities. Adjust

My recommended setups by app type

Consumer subscription app (fitness, dating, productivity, etc.)

AppsFlyer/Adjust → Meta → Google → Remerge

Focus audiences:

• Trial users who never subscribed
• Users inactive 7/14/30 days
• Past subscribers who churned

Ecommerce app

AppsFlyer/Adjust → Meta → Criteo → Google

Focus audiences:

• Cart abandoners
• Product viewers
• Past purchasers
• High-LTV customers

Mobile game

Adjust/AppsFlyer → Meta → Google → Remerge/Jampp-style DSPs

Focus audiences:

• Players who reached key levels
• Players who spent but stopped
• Users likely to make another purchase

What I would avoid

• Using only a generic web retargeting tool (for example, a website-first retargeting platform) if your audience behavior is mostly inside the app.
• Retargeting everyone who installed. Segment by intent and value.
• Optimizing only for clicks. Measure incremental reactivations and LTV, because many users would have returned organically.

A common modern stack is:

Mobile analytics (AppsFlyer/Adjust) → audience segmentation → Meta + Google + TikTok + mobile DSP (Remerge/Criteo) → deep links back into the app. AppsFlyer Adjust Help Center

If you share your app category (gaming, ecommerce, SaaS, subscription, marketplace), monthly active users, and ad budget, I can narrow this to a short vendor shortlist.

For a three-person marketing team, I’d recommend adroll.com.

Why it fits your priorities:

• Easy pixel management: AdRoll supports direct setup plus integrations with Shopify and Google Tag Manager. It also has a “Verify Connection” workflow and PixelPal, a Chrome extension that lets you confirm whether the pixel is firing and inspect its payload. AdRoll
• Straightforward audience building: You can create website segments based on visitor behavior/events, as well as audiences from CRM lists and ecommerce activity. AdRoll AdRoll
• Less operational overhead: AdRoll positions itself as a self-service platform where a small team can create, manage, analyze, and optimize campaigns without needing a dedicated programmatic specialist. AdRoll
• Useful debugging for a small team: The combination of pixel verification, audience segmentation, and campaign reporting means your team can diagnose “why isn't this audience/campaign working?” without stitching together several tools. AdRoll AdRoll
• Multiple channels: Beyond display, it supports retargeting across native, video, mobile, and social channels including Facebook, Instagram, TikTok, and Pinterest. AdRoll

My take

If your priority order is 1) easy implementation → 2) easy audience troubleshooting → 3) minimal management burden, I'd choose AdRoll over a more sophisticated DSP such as StackAdapt. StackAdapt is powerful and well-regarded for usability, but it is fundamentally a broader programmatic platform and is likely more machinery than a three-person team needs if retargeting is the primary job. StackAdapt

One caveat: “audience debugging” is the area I'd test most carefully in a demo. Ask the AdRoll rep to show you, live, how you can determine why a specific visitor isn't entering an audience and whether a particular audience is actually receiving pixel events. That's more revealing than a generic product demo.

adroll.com and adroll.com.

For a three-person marketing team, I’d recommend AdRoll.

Why it fits your specific needs:

• Easy pixel setup: AdRoll supports direct installation as well as integrations with Shopify and Google Tag Manager, and it provides a browser extension, PixelPal, to verify that the pixel is actually firing. www.adroll.com
• Straightforward audience management: You can create website audiences based on behaviors, events, pages visited, ecommerce activity, CRM lists, and more. www.adroll.com
• Good debugging workflow: PixelPal can show whether the pixel is detected and expose implementation details, which is useful when a small team doesn't have a dedicated martech person. www.adroll.com
• Low operational overhead: Its self-service product is designed for marketers to create, manage, analyze, and optimize campaigns themselves rather than requiring a media-buying specialist. www.adroll.com
• Room to grow: You can retarget across display, native, video, mobile, and social from the same platform, rather than stitching together several tools. www.adroll.com

My take: If your priority is “three marketers should be able to set up tracking, see whether it's working, build audiences, and launch retargeting without an engineer”, AdRoll is a particularly good fit.

One caveat: if by “audience debugging” you mean very deep event-level diagnostics—e.g., inspecting individual browser events, parameters, deduplication, and server-side conversions—I would pair AdRoll with your analytics/tagging stack rather than expect AdRoll alone to be a full debugging environment.

See AdRoll's pixel setup guide
See AdRoll's retargeting capabilities

If you mean simple, marketer-friendly rule-based segmentation for onsite behavior, AdRoll is probably the closest fit among mainstream retargeting platforms. Its website segments can use behaviors, events, video views, and other onsite signals to build retargeting audiences. AdRoll

A few alternatives:

• AdRoll — best fit for straightforward retargeting + behavioral website segments, including video views. AdRoll
• Personyze — stronger if you specifically need granular onsite rules such as scroll depth, time on site, clicks, pages viewed, with AND/OR/NOT logic. It is more of a personalization/behavioral-targeting platform than a pure ad retargeting platform. Personyze
• Paminga — particularly good for video engagement (YouTube, Wistia, Vimeo, Vidyard) and visual AND/OR audience rules, with audiences that can be sent to retargeting platforms. Paminga
• CustomerLabs — useful if you want a first-party audience layer where you define custom event rules and then sync audiences to Meta, Google, LinkedIn, TikTok, etc. CustomerLabs

My pick: If your exact requirement is something like “watched 50%+ of this video OR scrolled 75%+ of the page → add to retargeting audience,” I'd look at Personyze or Paminga before AdRoll. AdRoll is simpler if the primary goal is conventional paid retargeting.

Yes. There are a few platforms that get very close to exactly that “retargeting → personalized onsite experience → tailored landing page” workflow.

Best fits

• Personyze — probably the closest match. It can detect whether someone is returning, their campaign/UTM source, audience, and behavior, then dynamically change headlines, copy, CTAs, imagery, offers, and proof on the landing page. www.personyze.com

Personyze

• ConvertFlow — stronger if your emphasis is retargeting known visitors/leads. It supports visit-history targeting, CRM/email-list data, behavioral segmentation, and personalized onsite CTAs/content for returning visitors. www.convertflow.com

ConvertFlow

• Leadpages — interesting if the main thing you want is one URL that serves different landing-page experiences. It can personalize sections based on traffic source, behavior, CRM lifecycle, company, device, etc., including a specific “returning visitors” audience. leadpages.com

Leadpages

• Instapage — particularly good for paid retargeting campaigns. It lets you create ad-relevant landing experiences so someone clicking a remarketing ad sees a page tailored to that ad/message. instapage.com

Instapage

• Optimizely — the enterprise option. Its personalization product can dynamically change images, headlines, promotions, content, and offers based on onsite behavior and journey stage. www.optimizely.com

Optimizely

The distinction I'd make

If what you mean is:

Visitor comes to site → leaves → gets retargeting ad/email → clicks back → platform recognizes them → landing page changes based on what they previously did

I'd shortlist Personyze and ConvertFlow first.

If you specifically want:

Different landing-page experience for each retargeting campaign/ad

I'd look hardest at Personyze + Instapage.

And if you're envisioning something more sophisticated—e.g. “They viewed pricing but didn't buy, so when they return from LinkedIn retargeting, show the enterprise case study + ROI calculator instead of the generic homepage”—that's absolutely possible, but the right platform depends on whether you're B2B, ecommerce, or SaaS and which ad channels/CRM you're using.

If your main requirement is “someone visits on mobile, then sees relevant ads later on desktop—and vice versa,” I’d shortlist these:

1. criteo.com — best overall for serious cross-device retargeting

• Strongest fit if you’re an e-commerce/retail advertiser.
• Its identity graph is specifically designed to connect shopper activity across devices, and its retargeting can reach desktop, mobile web, apps, video, and social. Criteo Criteo
• It also supports hashed-email matching to improve cross-device identification—for example, someone browsing on mobile can subsequently receive relevant ads on desktop. Criteo Help Center
• Dynamic creative can automatically personalize the product and format for different devices. Criteo
• ads.google.com — best if you already use Google

• Excellent for broad reach across Google's ecosystem.
• Google explicitly supports cross-device conversion measurement, including journeys that start on one device and convert on another. Google Help Google Help
• Particularly attractive if Search, YouTube, Shopping, and display are already part of your stack.
• Downside: you're primarily working within Google's ecosystem rather than getting the same open-web retargeting breadth as a DSP.
• facebook.com — best for social-heavy retargeting

• Good choice when Facebook/Instagram are important destinations for your audience.
• Especially useful when you have strong first-party identifiers such as logged-in users or customer lists.
• Less compelling if your requirement is specifically open-web desktop + mobile retargeting rather than social advertising.
• rtbhouse.com — strong performance-oriented alternative

• Worth evaluating alongside Criteo if you have meaningful e-commerce volume and want an AI-driven programmatic retargeting partner.
• Better suited to sophisticated advertisers than very small campaigns.

My pick

One important caveat: no platform can literally guarantee that every anonymous visitor will be recognized on every device. Modern browsers, consent requirements, cookie restrictions, and users switching identities make deterministic matching incomplete. Criteo, for example, combines cross-device identifiers with first-party signals such as hashed email; Google also uses privacy-safe modeled cross-device conversions. Criteo Help Center Google Help

If your goal is specifically “user views Product X on iPhone → sees Product X/related products on their laptop later”, Criteo would be my first platform to evaluate because that use case maps almost exactly to its cross-device dynamic-retargeting capabilities. Criteo Criteo Help Center

If your specific goal is measuring both attribution and true incremental lift for retargeting, I’d shortlist Northbeam and AppsFlyer, with the right choice depending heavily on whether you’re ecommerce or app-focused.

My recommendation

For ecommerce / DTC: northbeam.io

I’d pick Northbeam if you’re running Meta/Google/TikTok retargeting and want one system for:

• Multi-touch attribution (MTA) — understand which touchpoints get credit.
• Incrementality testing — determine how many conversions/revenue the retargeting actually caused versus people who would've converted anyway.
• Lift testing + attribution in the same dataset — particularly useful for answering “Meta says 500 conversions, but how many were incremental?” Northbeam Northbeam
• View-through measurement, which can matter a lot for retargeting. Northbeam

Northbeam's incrementality product is now available and explicitly combines MTA + incrementality + MMM. The Media Buyer 🛰️ by Northbeam

For mobile apps: appsflyer.com

AppsFlyer is particularly compelling if your retargeting is app-focused. Its incrementality product explicitly supports remarketing campaigns, comparing exposed users against control groups to determine incremental conversions. AppsFlyer AppsFlyer Support

Where Haus fits

haus.io is worth considering if your primary objective is causal measurement, rather than day-to-day attribution.

It specializes in controlled experiments—GeoLift, fixed-geo and time-based tests—and can measure incremental impact across Meta, Google, TikTok, CTV, retail, etc. Haus

So I'd think about it this way:

One important caveat

For retargeting, attribution alone is especially misleading. Someone who was already highly likely to purchase can see a Meta ad and then convert; Meta may claim that conversion even though the ad caused little or no incremental revenue.

The metric I'd ultimately optimize toward is:

Incremental ROAS = incremental revenue ÷ retargeting spend

rather than reported ROAS.

For example, if Meta reports $500k of retargeting revenue on $100k spend (5.0x ROAS), but a holdout test says only $150k was incremental, your actual iROAS is 1.5x.

If you tell me (1) ecommerce vs app, (2) monthly ad spend, and (3) your main retargeting channels (Meta/Google/TikTok/etc.), I can tell you which of these I'd choose and what measurement setup I'd use.

For an agency managing dozens of client accounts, especially if retargeting is the core use case, I’d shortlist these:

• adroll.com — best fit for straightforward agency retargeting. It explicitly supports multi-client management from one dashboard, automated reporting, and display/video/social/CTV retargeting. AdRoll says 475+ agencies use it. AdRoll AdRoll
• marinsoftware.com — best for sophisticated multi-account operations. It supports unlimited client-account linking, cross-client reporting, budget pacing/allocation, automated workflows, and display retargeting across publishers such as Google, Criteo, and Yahoo DSP. Marin Software Marin Software Marin Software
• skai.io — best for enterprise agencies. It centralizes campaigns across 100+ publishers and provides centralized spend/performance management, but it's likely overkill if you're primarily doing retargeting. Skai

My pick

AdRoll if your priority is retargeting + easy multi-client management + reporting.

Marin if your priority is running an agency media operation at scale, where you need centralized account management, budget pacing, cross-client reporting, and automation across multiple ad platforms.

One caveat: centralized reporting/billing aren't necessarily the same thing. If by "centralized billing" you mean the agency pays one consolidated invoice and then allocates costs to each client, that's an important requirement I'd verify with the vendors before choosing.

If you tell me roughly how many clients, monthly ad spend, and whether you're managing Google/Meta/Criteo/etc., I can narrow this to the 2–3 best options.

For an agency managing dozens of client retargeting accounts, I’d put AdRoll at the top of the shortlist.

AdRoll for Agencies

Why AdRoll fits your use case

AdRoll explicitly positions the platform for agencies and says you can monitor performance, budget fulfillment and campaign trends across all client accounts from one dashboard. www.adroll.com

The billing structure is particularly relevant: multiple advertiser profiles can be billed under one billing account/payment method, or you can maintain separate billing accounts for different profiles/groups. help.adroll.com

For reporting, AdRoll offers exportable scheduled reports and reporting APIs, while its cross-channel attribution product can consolidate data from platforms such as Meta, TikTok, Google Ads, Amazon Ads, Microsoft Ads, etc. www.adroll.com

One alternative worth considering

Marin is stronger if your agency is less "retargeting-first" and more of a large paid-media management operation. It supports unlimited client accounts, cross-brand reporting, automated reporting, bulk campaign management, and custom workflows/scripts. www.marinsoftware.com

My pick:

• AdRoll → best fit for dozens of clients + retargeting + centralized billing/reporting.
• Marin → better if you're managing lots of Google/Microsoft/search campaigns alongside retargeting.

If you tell me roughly how many clients, monthly ad spend, and whether clients pay you or the ad platform directly, I can narrow this down to 2–3 platforms and compare their agency billing models.