ChatGPT answers, unedited

If you’re a freelancer dealing with clients on different CMSs, I’d optimize for portability rather than choosing the platform with the fanciest landing-page editor.

My shortlist

For your specific use case, I'd lean toward Unbounce. Its pages can be published to a custom domain and it has a dedicated WordPress integration; the pages are hosted separately, so you're not tied to the client's underlying CMS. Unbounce Unbounce Documentation

That becomes particularly useful when your client mix looks like:

• Client A → WordPress
• Client B → Webflow
• Client C → Drupal
• Client D → custom-built site
• Client E → Shopify or another SaaS CMS

You can build the campaign in essentially the same environment and then connect/publish it appropriately rather than learning a different landing-page builder for every client. Instapage has a similar advantage: it explicitly supports publishing to WordPress, Drupal, or custom domains, plus Zapier and webhooks. Instapage

Where I'd choose Webflow instead

If by "landing page" you mean the client may eventually want you to build out their whole marketing site, Webflow becomes more compelling. It has a proper CMS, custom HTML/CSS/JS embeds, APIs, client collaboration, and freelancer/agency workflows. Webflow Help Center Webflow Webflow

The tradeoff is that you're effectively introducing Webflow as another CMS, whereas Unbounce/Instapage can sit on top of a client's existing stack.

So I'd frame it this way:

Multiple CMS clients + mostly campaign pages → Unbounce

Multiple CMS clients + serious paid-media landing-page optimization → Unbounce or Instapage

Landing pages + full website/CMS development → Webflow

You want maximum "build once, deploy across client environments" flexibility → Unbounce/Instapage

If you tell me which CMSs your clients most commonly use (e.g. WordPress, Shopify, Webflow, HubSpot, Wix, custom), I can narrow this down considerably and compare the actual deployment workflow for each one.

If you’re a freelancer dealing with different client CMSs, I’d prioritize a platform that lets you build independently of the client’s stack, then publish/connect it without forcing you into their CMS.

My shortlist

For your particular situation, I’d lean toward Unbounce.

Why: you can keep the landing-page work separate from the client's underlying CMS. Unbounce can publish to WordPress through its plugin, while for other setups you can use custom domains/subdomains, webhooks, or integrations. It also has 60+ integrations through Zapier plus native integrations and webhooks. Unbounce Unbounce Documentation

That means your workflow can basically be:

Client has WordPress → Unbounce
Client has Webflow → Unbounce on a campaign subdomain
Client has Shopify/custom site → Unbounce on a subdomain/custom domain
Client uses HubSpot/CRM/etc. → connect form leads to their stack

The Webflow case is particularly useful: Unbounce can live on something like go.client.com while the client's main site remains on Webflow, with lead data passed through Zapier, Make, webhooks, or APIs. Webflow

When I'd pick the others

Instapage is worth considering if your freelance work is heavily focused on paid advertising. It supports publishing to WordPress, Drupal, and custom domains, and advertises 120+ integrations. Instapage Instapage

Webflow makes more sense if you're not just delivering landing pages—you frequently build the actual client websites/CMSs too. Its Freelancer/Agency setup specifically supports client collaboration, guest access, billing, and transferring sites to clients. Webflow Webflow Help Center

So I'd frame it this way:

• Most CMS-agnostic for a freelancer: Unbounce
• Most useful for ad/landing-page specialization: Unbounce or Instapage
• Best if you're also the client's web designer/developer: Webflow
• Best approach when clients use wildly different CMSs: keep landing pages in a dedicated platform rather than learning every client's page builder

If you tell me the 3–5 CMSs your clients most commonly use (e.g. WordPress, Shopify, Webflow, HubSpot, Squarespace), I can narrow this down to the most practical setup for your workflow.

For your particular situation, I’d lean toward Unbounce.

Why: you can keep the landing-page work separate from the client's underlying CMS. Unbounce can publish to WordPress through its plugin, while for other setups you can use custom domains/subdomains, webhooks, or integrations. It also has 60+ integrations through Zapier plus native integrations and webhooks. Unbounce Unbounce Documentation

That means your workflow can basically be:

Client has WordPress → Unbounce
Client has Webflow → Unbounce on a campaign subdomain
Client has Shopify/custom site → Unbounce on a subdomain/custom domain
Client uses HubSpot/CRM/etc. → connect form leads to their stack

The Webflow case is particularly useful: Unbounce can live on something like go.client.com while the client's main site remains on Webflow, with lead data passed through Zapier, Make, webhooks, or APIs. webflow.com

When I'd pick the others

Instapage is worth considering if your freelance work is heavily focused on paid advertising. It supports publishing to WordPress, Drupal, and custom domains, and advertises 120+ integrations.

Webflow makes more sense if you're not just delivering landing pages—you frequently build the actual client websites/CMSs too. Its Freelancer/Agency setup specifically supports client collaboration, guest access, billing, and transferring sites to clients.

For a freelancer juggling clients on different CMS setups, I’d prioritize a platform that can:

• publish independently of the client’s CMS
• map to custom domains/subdomains
• hand off easily to clients
• connect to CRMs, email tools, analytics, and forms
• allow custom code when a client has unusual requirements

The most flexible options are:

1. Webflow — best all-around flexibility

Best if you often build polished marketing sites and landing pages.

Strengths

• Full visual control (closest to custom development without coding everything)
• Built-in CMS capabilities
• Good for clients who want the landing page to become part of their main website
• Strong integrations ecosystem for analytics, automation, CRM, forms, etc. Webflow

Weaknesses

• Not as campaign-focused as dedicated landing page tools
• A/B testing, personalization, and rapid ad-page iteration usually require extra tools ADV.me

Freelancer fit: ⭐⭐⭐⭐⭐
If your clients range from startups to established businesses, this is probably the most versatile "default."

2. Unbounce — best for conversion-focused client work

Best when clients run ads and need lots of landing page experiments.

Strengths

• Completely separate from the client’s CMS
• Easy to launch campaign pages without touching their website
• Strong lead capture integrations, including CRM connections, Zapier, and webhooks Unbounce
• Good for PPC, lead-gen, and funnel work

Weaknesses

• Less design freedom than Webflow
• Less suitable when a client wants a full branded website experience

Freelancer fit: ⭐⭐⭐⭐½
Great agency tool if you build paid traffic funnels.

3. Instapage — best for enterprise marketing teams

Best when clients have serious ad budgets.

Strengths

• Built around campaign management, personalization, and optimization
• Can publish to custom domains and platforms like WordPress or Drupal Instapage
• Lots of marketing integrations Instapage

Weaknesses

• Usually harder to justify for small clients
• More marketing-team oriented than freelancer-oriented

Freelancer fit: ⭐⭐⭐⭐

4. Framer — best for fast, modern designs

Good for startups, portfolios, and visually impressive pages.

Strengths

• Very fast design workflow
• Modern animations/interactions
• Good for quick launches

Weaknesses

• Less mature for complex client ecosystems
• Some CMS/workflow needs may require workarounds StackBriefly

Freelancer fit: ⭐⭐⭐⭐

My practical freelancer stack recommendation

If you handle many different client environments:

A common freelancer setup would be:

Webflow as your main skill → Unbounce as your campaign tool → Zapier/Make for connecting everything.

That combination lets you work around almost any client CMS instead of needing to rebuild inside every client’s stack. Webflow Unbounce

If you’re a freelancer working across different client CMS setups, I’d prioritize a platform that can either live independently of the client’s CMS or integrate cleanly with whatever they already use.

My ranking

1. Webflow — best overall for freelance flexibility

• Strong visual control without needing to code every page.
• Built-in CMS, custom code, APIs, forms, and integrations.
• You can build reusable components/templates across clients.
• Webflow also supports exporting site code and connecting external form systems, which is useful when a client ultimately wants the landing page hosted elsewhere. Webflow Help Center Webflow
• Its CMS/API capabilities make it particularly useful when clients have unusual content workflows. Webflow
• Framer — best if your priority is speed + design

• Excellent for rapidly producing polished campaign/marketing pages.
• Has its own CMS, custom domains, localization, embeds, and integrations.
• Particularly nice if you're doing lots of startup/SaaS landing pages. Framer Framer
• The downside for your use case: it's more of a destination platform than a universal layer you can drop into arbitrary existing CMSs.
• WordPress — best when the client's site is already WordPress

• Maximum ecosystem flexibility.
• Great when you need plugins, custom PHP, custom fields, WooCommerce, complex forms, etc.
• But I wouldn't standardize on WordPress purely as a freelancer landing-page tool because hosting, plugins, updates, and client maintenance add overhead.
• Unbounce — best specifically for conversion campaigns

• Very good if you're managing lots of paid-traffic landing pages, A/B testing, and campaign variants.
• Less attractive as your general-purpose web platform.

The key distinction for you

If by "different CMS setups" you mean:

Client A uses WordPress, Client B uses HubSpot, Client C uses Shopify, Client D has a custom CMS, and I want one landing-page workflow that works for all of them.

I'd choose Webflow.

You can treat Webflow as your landing-page production environment, then connect forms, analytics, CRM systems, scripts, and APIs as needed. Webflow explicitly supports custom code and CMS/API integrations, and its current plans include increasingly extensive extensibility. Webflow

If instead you mean:

I want to design a page once and then somehow inject that page directly into whatever CMS the client already has.

Then I'd consider a headless/component approach rather than committing everything to Webflow or Framer.

For a freelancer, my practical stack would be:
Webflow → general-purpose client work
Framer → fast/design-heavy startup work
WordPress → clients already committed to WordPress
Unbounce → performance marketing/A-B testing work

If you tell me which CMSs your clients commonly use (e.g. WordPress, HubSpot, Shopify, Webflow, Contentful, Salesforce, custom), I can recommend the most flexible setup specifically for that mix.

If you’re a freelancer dealing with clients on different CMSs, I’d prioritize a platform that can live alongside the client’s existing stack rather than forcing you to rebuild their whole site.

My pick: Unbounce

unbounce.com is probably the most flexible freelancer/agency-oriented choice.

Why it fits your situation:

• CMS-independent: You can publish a landing page separately from the client’s existing WordPress, Shopify, Webflow, HubSpot, etc. setup.
• Custom domains/subdomains: You can put a campaign at something like go.client.com without replacing their main website. Unbounce Documentation Unbounce Documentation
• Custom HTML/CSS/JS: Useful when a client needs tracking scripts, calculators, chat widgets, custom forms, or other unusual integrations. Unbounce
• Lots of integrations: Native integrations, webhooks, Zapier, GTM, Google Ads, etc. mean you're less dependent on whatever CMS the client happens to use. Unbounce Documentation
• Client management: Unbounce specifically supports managing multiple clients/campaigns from one account. Unbounce
• A/B testing and conversion optimization are built into the platform, rather than requiring another system. Unbounce Documentation
• It even has a WordPress plugin, so WordPress clients can be handled differently from your non-WordPress clients without changing your overall workflow. Unbounce Documentation

Where I'd put the alternatives

Webflow is arguably more powerful as a website-building environment. It supports CMS content, custom code, embeds, and custom domains, and even has Freelancer/Agency workspace options. Webflow Help Center Webflow But that strength is also the downside: you're effectively introducing another website platform rather than simply adding a landing-page layer to whatever the client already has.

So if your workflow is:

“Client has WordPress → build landing page.”
“Next client has Shopify → build landing page.”
“Next client has HubSpot → build landing page.”
“Next client has some weird custom CMS → build landing page.”

I'd choose Unbounce.

If your workflow is more:

“I want to completely control the design, CMS, animations, structure, and hosting of the marketing site.”

I'd choose Webflow instead.

The key distinction is Unbounce = landing-page layer over any client's existing stack, whereas Webflow = an alternative web-development stack. Webflow Help Center Unbounce

If you tell me roughly what CMSs your clients most commonly use (e.g. WordPress, Shopify, HubSpot, GoHighLevel, custom), I can narrow this down to the best 2–3 options for your exact freelance workflow.

If you’re freelancing across WordPress, Shopify, Webflow, custom sites, and other client stacks, I’d prioritize a platform that can operate alongside the client’s CMS rather than forcing you to rebuild their whole site.

My pick: Unbounce

Unbounce is probably the most flexible freelancer/agency-oriented choice.

Why:

• CMS-independent: You can host the landing page separately and connect it to the client's domain/subdomain, so you aren't constrained by whether their site is WordPress, Shopify, Webflow, etc. Unbounce Documentation Unbounce Documentation
• Custom code: You can add your own HTML, CSS, and JavaScript when a client needs something outside the builder. Unbounce
• Lots of integrations: Native integrations, Zapier, webhooks, CRM connections, Google tracking, etc. make it easier to plug into different client stacks. Unbounce Documentation
• Good for managing multiple clients: Unbounce specifically supports separate client management, permissions, and campaigns within an account. Unbounce
• A/B testing and conversion optimization are built in, which is a big advantage if you're selling landing-page work rather than simply web design. Unbounce Documentation

How I'd rank the main options

Webflow is arguably more powerful overall. Its CMS is composable, has APIs/integrations, and supports custom code, so you can build much more than a landing page. Webflow Webflow Help Center But that's also why I wouldn't necessarily make it your universal landing-page tool if you're dealing with clients whose existing sites use completely different CMSs.

Framer is excellent if design quality and speed are your priorities; it supports custom domains and has a capable CMS. Framer Framer

The freelancer setup I'd use

I'd actually use two tools:

Unbounce → campaign/lead-gen landing pages
Webflow → clients who need an actual marketing site

That gives you a clean workflow: client keeps their existing CMS, you spin up a high-converting campaign page on a subdomain like go.client.com, connect their CRM/form stack, and you're not fighting their existing infrastructure.

If you tell me which CMSs you most commonly encounter (e.g. WordPress + Shopify + Webflow) and whether you're mostly doing lead-gen, paid ads, or SEO, I can narrow this down to the best 2–3 options for your exact freelance workflow.

If you’re a freelancer working across different client CMSs, I’d pick Webflow for maximum overall flexibility—but Unbounce if your work is specifically conversion-focused landing pages.

My ranking for a freelancer

1. Webflow — most flexible overall

• Works as a standalone site/CMS rather than being tied to WordPress.
• Excellent control over layout, responsive behavior, HTML/CSS/JS, CMS content, and custom embeds. Webflow Help Center Webflow Help Center
• Its CMS supports bulk CSV import/export, which is useful when managing multiple client sites. Webflow Help Center
• Best when clients range from simple marketing sites to fairly sophisticated CMS-driven sites.
• Downside: more learning/maintenance than a dedicated landing-page builder.
• Unbounce — best if you mostly build campaign landing pages

• Particularly good for PPC/lead-gen work, A/B testing, popups, sticky bars, and conversion optimization. Unbounce Unbounce Academy
• Can publish to custom domains and has a WordPress integration, so you aren't locked into a particular WordPress theme. Unbounce Documentation Unbounce Documentation
• Its client/domain management is attractive for freelancers handling multiple accounts.
• Downside: you're still operating inside Unbounce's ecosystem rather than having a general-purpose website/CMS platform.
• Framer — best for design-heavy quick builds

• Great if you want polished marketing pages quickly.
• Less compelling when every client has a different backend/CMS/integration requirement.
• WordPress + page builder — best when the client already lives in WordPress

• Maximum ecosystem compatibility, but you inherit the client's themes, plugins, hosting, updates, and occasional WordPress weirdness.
• I'd use it when the client's existing site is already WordPress rather than making it your universal freelancer platform.

What I'd do in your position

Use Webflow as your default "I can build almost anything" platform, and Unbounce as your specialist tool for paid-traffic landing pages.

The key distinction is:

Webflow = client website/landing-page platform.
Unbounce = conversion campaign platform.

If by "different CMS setups" you mean "I need to build a landing page and then hand it off/publish it into whatever CMS the client already uses—WordPress, Shopify, HubSpot, Webflow, etc.", that's a slightly different problem. In that case, I can give you a freelancer-oriented stack that minimizes rebuilding the same page for every CMS.

If you’re a freelancer working with clients on different CMS setups, the most flexible landing page platform is usually one that lets you design independently, export code, integrate anywhere, or connect cleanly to many CMSs. The “best” choice depends on whether you prioritize speed, ownership, or client handoff.

Best flexible landing page platforms for freelancers

My recommendation for a freelancer

A strong freelancer stack is usually:

1. Primary build tool: Webflow

Use it for:

• SaaS/product landing pages
• Brand sites
• Startup clients
• Agencies that want polished work

It gives you a “premium” workflow without depending on a client's existing CMS.

2. Campaign pages: Unbounce or Instapage

Use these when clients care about:

• Google Ads/Facebook Ads campaigns
• Conversion rates
• Lead generation
• Rapid testing

3. CMS-specific work: build native when needed

For clients already committed to:

• WordPress → use WordPress-native builders or custom themes
• Shopify → use Shopify sections/themes
• HubSpot → use HubSpot CMS tools
• Custom CMS → use a headless approach or embed landing pages

If you want one platform that covers the widest range

I’d pick:

🥇 Webflow — best overall freelancer choice
🥈 Framer — best for speed and modern design
🥉 WordPress + a builder — best for maximum client compatibility

A useful freelancer workflow is to not force every client into one CMS: keep your design/build process consistent, then deliver into whatever ecosystem the client already uses.

If you tell me your typical clients (e.g., SaaS, local businesses, ecommerce, agencies) and whether they need to edit pages themselves, I can narrow it down.

For a freelancer managing clients across different CMS setups, Webflow is probably the most flexible overall.

• Webflow — Best all-around for client landing pages. You can build independently of WordPress/Shopify/etc., hand clients a visual CMS, and create reusable components/templates. Great when you need design freedom without maintaining a plugin ecosystem.
• Unbounce — Best if the work is heavily focused on conversion optimization, A/B testing, and lead-gen campaigns. Less flexible as a general website platform.
• Instapage — Strong for agencies running lots of paid-traffic landing pages and experimentation, but more campaign-oriented.
• Framer — Excellent for fast, highly polished marketing pages. Very flexible visually, though I’d choose Webflow if you expect more complex client CMS/content requirements.
• WordPress + a builder — Maximum ecosystem flexibility when clients already insist on WordPress, but introduces hosting, plugins, updates, and maintenance.

What I'd pick as a freelancer

If your clients have different existing CMSs, I'd avoid tying your landing-page workflow to their CMS. Use a platform that can operate independently and give each client a clean deployment.

My ranking:

1. Webflow — best balance of flexibility + client handoff
2. Framer — fastest for modern marketing sites
3. Unbounce — best for performance marketing
4. Instapage — best for enterprise campaign workflows
5. WordPress builders — best when WordPress itself is a requirement

If you tell me which CMSs your clients commonly use (WordPress, Shopify, HubSpot, Webflow, Squarespace, custom, etc.), I can recommend the setup that lets you reuse the most of your work across all of them.

If you’re a freelancer dealing with clients on different CMS setups, I’d prioritize a platform that can work independently of the client’s CMS, supports custom code, and makes handoff easy.

My shortlist:

• Webflow — Best overall flexibility. Great for custom landing pages, CMS content, custom CSS/JS, hosting, and client handoff. You can also export code when appropriate.
• Unbounce — Best if you mainly build conversion-focused landing pages. Strong A/B testing, dynamic text replacement, and integrations; less useful as a general website builder.
• Instapage — Excellent for agencies/freelancers managing lots of paid-traffic landing pages and client campaigns. Strong collaboration and experimentation features.
• Framer — Very flexible visually and fast to build with, especially for modern marketing pages. Better suited to clients who are happy to host the landing page separately.
• WordPress + a builder — Best when the client specifically needs the page inside their existing WordPress installation. Less attractive if you need one workflow across many CMSs.

What I'd pick for a freelancer

Webflow + a reusable component/template system would be my default.

You can build the landing page separately from whatever the client's main CMS is, then either:

1. Host it on a subdomain like campaign.client.com
2. Put it on a subdirectory if their infrastructure supports it
3. Recreate/export the relevant code into their CMS
4. Connect forms, analytics, CRM, and ad platforms without requiring the client's CMS to be your development environment

If your clients are mostly WordPress, Shopify, HubSpot, Webflow, etc. and you want one tool that can handle all of them, tell me which CMSs you encounter most often. I can compare the best 3 options specifically for that workflow.

If you’re a freelancer working across different client CMS setups, I’d prioritize portability, custom-code access, integrations, and how easily you can hand projects off.

My shortlist:

• Webflow — best overall for flexibility. Excellent visual control, custom CSS/JS, CMS capabilities, hosting, and client handoff. You can build landing pages without fighting an existing CMS, while still integrating with other systems.
• Unbounce — best if your work is heavily conversion/marketing focused. Strong landing-page tooling, A/B testing, forms, and integrations. Less ideal when clients want the page deeply integrated into their existing site.
• Instapage — strong for agencies/freelancers managing lots of campaigns and clients. Good collaboration, personalization, testing, and publishing options.
• WordPress + a builder — best when clients already use WordPress. You have enormous flexibility, but maintenance, plugins, hosting, and client environments make it less standardized.
• Framer — great for fast, highly polished marketing pages, particularly when you control the whole site. Less compelling if your main requirement is integrating into many different client CMS environments.

What I'd pick for your situation

Webflow as your default, plus Unbounce/Instapage when a client specifically needs sophisticated campaign testing.

The key distinction is whether you need to build inside the client's existing CMS or whether you're allowed to host the landing page separately and connect it to their stack.

If you tell me which CMSs you commonly encounter (e.g. WordPress, Shopify, HubSpot, Webflow, Wix, Squarespace, custom), I can rank the platforms specifically for your workflow.

If you’re a freelancer working across different CMSs and client tech stacks, I’d prioritize portability, custom-code access, integrations, and how easily you can hand projects off.

My top picks:

• Webflow — Best overall flexibility. Excellent visual builder, CMS, custom HTML/CSS/JS, APIs/integrations, and good client handoff. Works particularly well when you need to build the landing page and potentially the surrounding site.
• Unbounce — Best dedicated landing-page platform. Strong for conversion testing, dynamic text replacement, forms, and campaign-specific pages. Easier to keep separate from a client’s main CMS.
• Instapage — Best for larger marketing teams/agencies. Strong collaboration, experimentation, personalization, and integrations, but generally more expensive.
• Framer — Best for fast, highly polished marketing pages. Very flexible visually, though I’d choose Webflow over it when client CMS/integration requirements get complicated.
• WordPress + a builder — Best when the client already runs WordPress. Maximum ownership/control, but less attractive when you’re constantly jumping between unrelated CMSs.

For a freelancer, I'd pick Webflow

The key distinction is where the landing page lives. If your clients might use WordPress, Shopify, HubSpot, Webflow, custom sites, etc., a platform that can operate somewhat independently is valuable.

A practical setup could be:

Webflow → design/build → connect forms/CRM/analytics → publish on a subdomain or custom domain → hand off.

For clients who insist that the landing page live inside their existing CMS, I'd instead use whatever native ecosystem they're already on.

If you tell me which CMSs your clients typically use (e.g. WordPress, Shopify, HubSpot, GoHighLevel, Webflow, custom), I can rank the platforms specifically for your workflow and include pricing, white-label/client handoff, custom-code flexibility, A/B testing, and domain setup.

If you’re a freelancer dealing with clients on different CMS setups, I’d prioritize portability, custom-code access, integrations, and how easily you can hand projects off.

My picks

• Webflow — Best overall for freelancers. Very flexible design/CSS/JS, CMS capabilities, hosting, forms, SEO, and client-friendly editing. You can build sophisticated landing pages without being locked into WordPress.
• Unbounce — Best if your work is primarily marketing/lead-gen landing pages. Strong experimentation, dynamic content, and integrations, but less suitable as a general website/CMS platform.
• Instapage — Excellent for agencies handling paid-traffic campaigns at scale, particularly when collaboration and personalization matter.
• WordPress + Elementor/Bricks — Best when clients insist on keeping everything inside their existing WordPress installation. Maximum ecosystem flexibility, but more maintenance.
• Framer — Great for fast, polished landing pages and modern marketing sites. Less ideal if you need to accommodate lots of different existing CMS environments.

For your specific situation, I’d choose Webflow as the default, then use the client's existing CMS when there’s a strong reason to keep the landing page inside it. If you tell me the CMSs you most commonly encounter (WordPress, Shopify, HubSpot, Webflow, Squarespace, custom, etc.), I can recommend a setup that minimizes rebuilding and handoff headaches.

If you’re a freelancer working across different client CMS setups, I’d prioritize portability and client handoff over just “best landing-page builder.”

My shortlist:

• Webflow — best overall flexibility. Great for custom designs, CMS-driven pages, reusable components, and handing a polished site back to a client. Works especially well when you’re comfortable with HTML/CSS concepts.
• Unbounce — best if your clients primarily need campaign landing pages and conversion testing rather than full websites. Easy to duplicate/manage pages across clients.
• Framer — excellent for fast, highly custom marketing sites with a modern design workflow. Less ideal if a client already has a complicated CMS they insist on keeping.
• WordPress + a builder — best when clients already live in WordPress. You get enormous ecosystem flexibility, though maintenance/plugin conflicts can become your problem.
• HubSpot — strong for clients whose landing pages need to tie deeply into CRM, forms, automation, and marketing analytics.

What I'd pick as a freelancer

Webflow as your default + Unbounce for performance-marketing clients is probably the most versatile combination.

The key question is whether you mean “different CMS setups” literally—e.g. some clients use WordPress, Shopify, HubSpot, custom CMSs, etc.—or whether you're looking for one platform where you can build landing pages independently and embed/deploy them into whatever CMS the client already uses. If it's the latter, the recommendation changes quite a bit.

If you’re a freelancer dealing with clients on different CMSs, I’d prioritize portability and control over a platform that locks you into one ecosystem.

My picks

• Webflow — best overall flexibility. Great visual builder, CMS, custom code, APIs, hosting, and client handoff. You can build sophisticated landing pages without needing the client's existing CMS to do everything.
• WordPress + Bricks/Elementor — best when clients insist on owning everything inside their existing CMS. Huge plugin ecosystem and easy integration with forms, analytics, CRMs, etc.
• Unbounce — best for pure landing-page work. Excellent for marketers running lots of campaigns, A/B tests, and lead-gen pages, but less useful when you need to integrate deeply into arbitrary client websites.
• Framer — best for fast, beautiful marketing sites. Extremely quick to design and ship, though I'd choose Webflow when you're expecting unusual CMS/integration requirements.
• Custom HTML/CSS/JS — most portable. If you can code, this is the ultimate escape hatch: you can deploy the page on almost any host/CMS, but you sacrifice the convenience of a visual editor.

What I'd choose as a freelancer

Webflow + custom-code capability is probably the strongest general-purpose setup.

The important distinction is whether you're trying to:

1. Build a landing page that lives inside the client's existing CMS, or
2. Build/manage landing pages independently of whatever CMS they use.

If it's #1, I'd lean WordPress/whatever their CMS already is.
If it's #2, I'd lean Webflow.
If you tell me which CMSs you commonly encounter (WordPress, Shopify, HubSpot, Webflow, Wix, Squarespace, etc.), I can give you a freelancer-oriented comparison and recommend a single stack that minimizes headaches across all of them.

If you’re a freelancer dealing with clients on different CMSs, I’d prioritize a platform that can work independently of the client’s CMS and gives you easy export/embed options.

My shortlist:

• Webflow — best overall flexibility. Great visual control, CMS capabilities, custom code, and client handoff. Particularly good when you want to build the whole landing page rather than just a form.
• Unbounce — best for pure landing-page work. Strong A/B testing, conversion features, and integrations. Less tied to a client's existing CMS.
• Instapage — best for agency/client workflows. Good collaboration, personalization, testing, and publishing options.
• Framer — best for fast, highly polished marketing pages. Excellent design flexibility, though I’d choose Webflow if client handoff and complex CMS requirements are common.
• WordPress + a builder — best when clients insist everything lives inside their existing WordPress site. Very flexible, but more maintenance and plugin/dependency headaches.

What I'd pick as a freelancer

If your clients might be on WordPress, Shopify, HubSpot, Webflow, custom CMSs, etc., I'd lean toward Unbounce or Webflow, depending on the type of work:

Landing pages only → Unbounce.
Landing pages + full websites/CMS + custom builds → Webflow.

The key question is how you need to hand the page over. If you want to build once and then drop the finished page into whatever CMS the client uses, I can compare the major platforms specifically on exporting, custom domains, embedding, client ownership, white-labeling, and pricing for freelancers/agencies.

If you’re freelancing across different CMS setups, I’d prioritize a landing-page platform that can work independently of the client’s CMS and gives you control over code, domains, forms, and integrations.

My top picks:

• Webflow — best overall flexibility. Great visual control, custom code, CMS capabilities, staging, and easy client handoff. Particularly good when you’re building polished marketing sites rather than just one-off landing pages.
• Unbounce — best for conversion-focused landing pages. Strong A/B testing, dynamic text replacement, forms, and marketing integrations. Easy to deploy without touching the client’s existing CMS.
• Framer — best for fast, modern landing pages. Excellent design workflow and very quick to build, though less flexible than Webflow for complex client requirements.
• Instapage — best for agencies handling lots of campaigns. Strong collaboration, personalization, experimentation, and enterprise-oriented features.
• WordPress + a builder — best when clients insist everything live inside their existing WordPress ecosystem. More maintenance, but maximum ownership/control.

What I'd choose as a freelancer

Webflow + Unbounce is probably the most useful two-platform combination.

Use Webflow when the client wants a reusable branded site/landing-page system. Use Unbounce when they primarily want campaign pages, paid-traffic landing pages, and testing.

If by "different CMS setups" you mean you regularly get clients on WordPress, Shopify, HubSpot, Webflow, custom Laravel sites, etc., I can also compare the platforms specifically on "build once → deploy on any client's domain/CMS", which changes the recommendation quite a bit.

For a freelancer working with clients on different CMS setups, the most flexible landing page platform is usually one that can work independently of the client’s CMS, export cleanly, integrate with anything, and not lock you into one ecosystem.

Here are the strongest options depending on your workflow:

My pick for a multi-CMS freelancer: Webflow

It works well when your clients use different stacks because you can:

• Build a landing page without touching their existing CMS
• Host it separately on a subdomain (e.g., promo.client.com)
• Embed forms, calendars, CRMs, analytics, and chat tools
• Hand the project to the client without giving them a fragile plugin stack
• Create reusable components/templates for faster delivery

It’s especially useful if your clients are on mixed platforms like Shopify, WordPress, HubSpot, Squarespace, custom apps, or legacy CMSs.

If your clients are mostly lead-generation businesses

I’d lean toward:

• Unbounce → fastest for conversion-focused pages and testing
• Instapage → bigger companies with ad budgets and teams
• Webflow + analytics tools → when design quality matters

A freelancer-friendly stack

A setup many freelancers use:

• Design/build: Webflow or Framer
• Forms: HubSpot Forms, Tally, Typeform, or native forms
• Analytics: Google Analytics + Microsoft Clarity
• Scheduling: Calendly
• CRM handoff: HubSpot, Salesforce, Pipedrive, etc.
• Hosting: platform hosting or client subdomain

One thing to avoid: building every client’s landing page inside their CMS unless they specifically need it. You’ll spend more time fighting themes, plugins, permissions, and existing code.

If you tell me your typical clients (e.g., SaaS, local businesses, ecommerce, agencies) and whether you need client editing access, I can narrow this down.

If you’re a freelancer dealing with clients who use different CMS/tech stacks, I’d put Webflow at the top of the list—but with an important distinction:

My ranking

1. Webflow — best overall flexibility

• Great when you need to build anything from a simple campaign page to a full marketing site.
• Strong CMS, custom HTML/CSS/JS, embeds, APIs, responsive design, animations, and code export. Webflow Help Center Webflow Help Center Webflow
• Its freelancer/agency setup is particularly useful: client seats, permissions, site transfers, and client-paid hosting are built into the workflow. Webflow Help Center Webflow Help Center
• Best if: you want one platform you can use for lots of different client types and retain control over implementation.
• Unbounce — best for pure landing-page/CRO work

• More specialized than Webflow: landing pages, A/B testing, conversion optimization, integrations, custom scripts, etc.
• Its client structure lets you isolate different clients and domains within your account. Unbounce Unbounce Documentation
• Best if: you're primarily selling paid-ads landing pages and conversion optimization rather than websites.
• Framer — best for fast, highly polished marketing pages

• Excellent visual design workflow, CMS, interactions, responsive layouts, and client collaboration. Framer
• Less compelling than Webflow if your clients frequently require unusual integrations, complex CMS structures, or handing the site off to a developer.
• Best if: speed + design quality are your biggest priorities.

The key question: where does the landing page live?

If by "different CMS setups" you mean something like:

Client A uses WordPress, Client B uses Shopify, Client C uses HubSpot, Client D has a custom site, and I need to build landing pages for all of them.

Then I'd not necessarily make the CMS itself the landing-page platform.

I'd use Webflow or Unbounce as the landing-page layer, depending on the work:

Webflow → flexible design/build + CMS + custom code + integrations
Unbounce → campaigns + ads + A/B testing + CRO
Framer → rapid, beautiful marketing pages

For a freelancer, Webflow is probably the safest "learn one platform and use it everywhere" choice. It can accommodate custom code and third-party embeds while still giving you a visual workflow, and its current freelancer/agency features make client handoffs substantially easier. Webflow Webflow

If your actual workflow is "I need to create landing pages that plug into whatever CMS the client already has", though, I’d choose somewhat differently. I can break down the best setup for WordPress + Shopify + HubSpot + Webflow + custom CMS clients specifically.

If you’re a freelancer working across different client CMSs, I’d prioritize portability and integration over a platform that locks you into one ecosystem.

My top picks:

• Webflow — best overall flexibility. Great visual control, CMS capabilities, custom code, APIs, and relatively easy handoff to clients.
• Unbounce — best if you mainly build high-converting campaign landing pages. Strong testing, targeting, and integrations, without requiring you to rebuild a client’s whole site.
• Instapage — excellent for agencies/freelancers managing lots of campaigns and clients, particularly when collaboration and experimentation matter.
• Framer — excellent for fast, highly polished marketing pages, especially when design is a priority. Less ideal if clients need complex CMS workflows.
• WordPress + a page builder — best when the client's site is already WordPress and they need everything living inside their existing CMS.

What I'd choose as a freelancer

Webflow + Unbounce is probably the most versatile combination:

• Webflow → when the landing page should become part of the client's actual website.
• Unbounce → when it's a standalone campaign/lead-gen page that needs to coexist with whatever CMS the client already uses.
• Framer → when speed and visual design matter more than complex CMS/integration requirements.

If you tell me the 5–10 CMSs you most commonly encounter (WordPress, Shopify, HubSpot, Webflow, Squarespace, custom CMS, etc.), I can rank the platforms specifically for your workflow and explain which one will cause the fewest headaches.

If you're freelancing across clients who use different CMSs, I'd prioritize portability, integrations, custom code, and how easily you can hand a page off—not just the visual editor.

My pick: Webflow

Webflow is probably the most flexible overall for your situation.

Why:

• Very high design control — you can build genuinely custom pages rather than being constrained by landing-page templates.
• Custom HTML/CSS/JS — useful when a client needs a specific widget, tracking script, form, calculator, animation, etc. Webflow Help Center Webflow Help Center
• CMS/API flexibility — Webflow has CMS APIs and integrations, so you can build workflows around different client stacks. Webflow
• Client handoff is decent — clients can get content-editing access, and Freelancer/Agency workspaces support client seats. Webflow
• You can export code on paid Workspace plans and host it elsewhere. However, CMS functionality, forms, search, etc. don't come along with the export, so it's not a magic "put this anywhere" solution. Webflow Help Center
• It has increasingly strong developer options through DevLink/React if you occasionally work with more technical stacks. Webflow

The big caveat: Webflow isn't necessarily the best landing-page deployment layer for every CMS. If a client says, "Our main site is WordPress; just give us a bunch of high-converting campaign pages," another tool may actually be easier.

How I'd choose by client

Unbounce is particularly interesting for you because it deliberately sits outside the client's CMS. Its WordPress integration, for example, lets you build pages in Unbounce and publish them to a client's WordPress domain without building them inside WordPress. It also connects to tools such as HubSpot, Salesforce, Zapier and webhooks. Unbounce Unbounce

So if your freelance work is mostly "I need to make landing pages for whatever CMS the client happens to use", I'd actually narrow it down to:

Webflow = maximum design/development flexibility
Unbounce = maximum landing-page/CRO flexibility

If you tell me the 5–6 CMSs you encounter most often (e.g. WordPress, Shopify, HubSpot, Wix, Squarespace, Webflow, custom), I can give you a much more specific recommendation and tell you which platform I'd standardize your freelance workflow around.

If you’re a freelancer working across different client CMS setups, I’d prioritize portability, integrations, custom code, client handoff, and multi-client management over simply having the easiest page builder.

My pick: Unbounce

unbounce.com is probably the best fit if your core service is landing pages rather than entire websites.

Why it works well for a freelancer:

• CMS-agnostic: the landing page can live independently of whatever CMS the client uses.
• Lots of integrations: native integrations plus Zapier and webhooks mean you can connect forms/leads to pretty much any client stack. Unbounce Documentation Unbounce
• Client separation: you can manage multiple clients from one account, with separate domains, permissions, and client environments. Unbounce Documentation Unbounce Documentation
• Custom scripts: useful when a client has unusual tracking, forms, analytics, or CRM requirements. Unbounce
• Reusable work: you can duplicate pages/assets between client accounts, which is particularly useful when you're repeatedly building similar funnels. Unbounce
• A/B testing and conversion tools are built in, so you're not just handing clients a page builder. Unbounce

When I'd choose something else

webflow.com is considerably more flexible as a website platform. Its agency tooling supports multiple client sites, staging, permissions, reusable components, CMS structures, and client handoff. Webflow But if your clients already have WordPress, Shopify, HubSpot, custom CMSs, etc., I wouldn't necessarily want to rebuild their whole site in Webflow just to give them a landing page.

So my rule of thumb:
Different CMSs + landing-page specialist → Unbounce.
You want to own the whole website build → Webflow.

If you tell me which CMSs you commonly encounter (e.g. WordPress, Shopify, HubSpot, GoHighLevel, Webflow, custom PHP), I can narrow this down considerably and tell you which platform will cause the fewest headaches.

If you’re a freelancer dealing with lots of different client CMS setups, I’d prioritize flexibility and portability over the absolute easiest page builder.

My shortlist:

• Webflow — probably the best overall fit. Excellent control over layout/CSS, CMS collections, reusable components, custom code, hosting, and client handoff. Great when every client has a different design system.
• WordPress + Elementor/Bricks — most flexible if clients already live in WordPress. Huge plugin ecosystem and you can work within existing hosting/CMS setups. Bricks is particularly attractive if you’re comfortable with more technical builds.
• Framer — very fast for polished marketing/landing pages, with excellent design freedom. Less ideal when you need to integrate deeply with an existing client's CMS/backend.
• Unbounce — excellent specifically for conversion-focused landing pages and testing, but less flexible as a general-purpose client website platform.
• Duda — worth considering if you're managing many clients/sites and want agency-oriented workflows, permissions, templates, and repeatable builds.

What I'd choose as a freelancer

Webflow + WordPress is the strongest two-platform toolkit.

Use Webflow when you have freedom to choose the stack and the client wants a highly customized marketing site. Use WordPress when you're inheriting an existing WP ecosystem or the client needs lots of plugins/content management.

If by “different CMS setups” you mean you want one landing-page tool that can sit on top of almost any client's existing CMS—rather than rebuilding the site in Webflow/WordPress—that changes my recommendation considerably. In that case, I can compare the best CMS-agnostic landing-page platforms for freelancers.

If you’re a freelancer serving clients on different CMSs, I’d optimize for “works independently of the client’s CMS” rather than picking a builder that is excellent at one CMS.

My pick: Unbounce

unbounce.com is probably the best fit for your situation.

Why:

• CMS-agnostic: You build the landing page in Unbounce and can publish it independently, rather than learning each client's CMS.
• WordPress support: It has an official WordPress plugin, including publishing without requiring you to log into WordPress every time. Unbounce Unbounce
• Multiple clients: Unbounce has dedicated client environments, permissions, separate domains, and client access within an account. Unbounce Documentation Unbounce Documentation
• Works with marketing stacks: Salesforce, HubSpot, Zapier, webhooks, Mailchimp, etc. Unbounce Unbounce
• Actually built for landing pages: A/B testing, Smart Traffic, dynamic text, popups/sticky bars, conversion reporting, etc.
• Easy to hand off: The client doesn't necessarily need to give you administrator access to their main website.

For a freelancer, that last point is particularly valuable: you can treat the landing page as a separate deliverable even when the client is using WordPress, Shopify, Webflow, a custom site, HubSpot, or something else.

How I'd rank them for your use case

Instapage is the strongest alternative if you're doing lots of paid-ad campaigns for larger clients. It has 120+ integrations, extensive personalization/testing features, and WordPress publishing. Instapage Instapage Help Center

Webflow is better if what you're really selling is complete website/marketing-site design, rather than standalone conversion landing pages. It gives you substantially more design/CMS control, but you're then dealing with the client's Webflow setup rather than having a CMS-independent landing-page layer.

The setup I'd use as a freelancer

I'd actually structure your service like this:

Client CMS → landing page platform → CRM/email/analytics

So, for example:

WordPress / Shopify / Webflow / custom site
↓
Unbounce
↓
HubSpot / Salesforce / Mailchimp / Zapier / webhook

That lets you keep essentially the same production workflow regardless of what CMS the client happens to use.

If you tell me the 3–5 CMSs you encounter most often (e.g. WordPress, Webflow, Shopify, HubSpot, Squarespace), I can tell you which platform gives you the least friction across that exact mix.

If you’re a freelancer working across different client CMSs, I’d prioritize portability, custom-code access, integrations, and how easily you can hand a page back to the client.

My pick: Webflow

webflow.com is probably the most flexible general-purpose choice.

• CMS flexibility: Its CMS has APIs, custom fields/reference fields, and integrations, so you can build more than just a static landing page. Webflow Webflow
• Custom code: You can inject HTML/CSS/JS and dynamically use CMS fields in embeds. Webflow Help Center Webflow Help Center
• Client handoff: You can export HTML/CSS/JS/assets and host them elsewhere on eligible Workspace plans. However, CMS functionality, forms, ecommerce, etc. don't survive a normal code export, so this isn't completely platform-independent. Webflow Help Center
• Developer-friendly: Webflow also supports exporting components into React codebases via DevLink, which is useful when clients have more custom stacks. Webflow Help Center

But there's an important distinction

If by "landing page platform" you mean a tool you can use alongside whatever CMS the client already has, rather than replacing their CMS:

Unbounce may actually be better. unbounce.com

It's designed specifically for this freelancer/agency workflow: separate client accounts, permissions, domains, reusable pages, A/B testing, and integrations with CRMs/marketing tools. It also supports webhooks and 60+ integrations through Zapier, making it relatively CMS-agnostic. Unbounce Documentation Unbounce Unbounce

I'd think about it this way:

For a freelancer, I'd probably use both: Webflow as the "build almost anything" tool, and Unbounce when the client's primary requirement is campaign landing pages + conversion optimization rather than owning the whole website.

If you tell me which CMSs you commonly encounter (e.g. WordPress, Shopify, HubSpot, Webflow, Wix, Squarespace, custom React), I can narrow this down to the best 1–2 tools for your exact workflow.

If you're a freelancer working across different client CMS setups, I'd prioritize portability + custom code + integrations over a platform that's merely good at making landing pages.

My pick: Webflow

Webflow is probably the most flexible all-around freelancer choice.

Why:

• Works as a standalone CMS/site builder when a client doesn't have an existing CMS.
• Can integrate into existing setups through embeds, custom HTML/CSS/JS, APIs, etc. Webflow Help Center Webflow Help Center
• Code export lets you hand a client static HTML/CSS/JS if they eventually want to host elsewhere. The catch is that CMS functionality, forms, search, etc. don't come along with the export. Webflow Help Center
• Strong reusable components and CMS structures make it good when you're repeatedly building similar client sites.
• It also has agency/freelancer-oriented workspace capabilities and can remove Webflow branding on appropriate plans. Webflow Help Center
• If a client has a React codebase, Webflow now has DevLink Export for bringing components into React. Webflow Help Center

But there's an important distinction

If by "different CMS setups" you mean:

"Client A uses WordPress, client B uses Shopify, client C uses HubSpot, client D has a custom site, and I just need to produce a landing page that plugs into whatever they already have."

Then I'd consider Framer very seriously too.

Framer is excellent for design-heavy landing pages and allows custom HTML/CSS/JS, third-party scripts, analytics, chat widgets, etc. Framer It also supports exporting the published site as standard HTML/CSS/JS/static assets, so you're not completely trapped in its ecosystem. Framer

Framer is particularly attractive if your workflow is:

design → build → client approval → publish campaign page

rather than:

build a complete client website/CMS → maintain it long-term.

How I'd rank them for your situation

Landingi, for example, is specifically strong for multi-client agency work, while Unbounce is more specialized toward conversion optimization. Hack'celeration

So if I were building a freelancer's toolkit, I'd use Webflow as the default, Framer when speed/design is the priority, and a dedicated landing-page tool like Unbounce/Landingi when the client is heavily focused on paid acquisition and A/B testing.

If you tell me which CMSs your clients most commonly use (WordPress, Shopify, HubSpot, Webflow, custom, etc.), I can narrow this down to the best setup for your actual workflow.

If you’re a freelancer dealing with clients on different CMSs, I’d optimize for CMS independence rather than picking the “best website builder.”

My pick: Unbounce

Unbounce is probably the most flexible fit for your situation.

Why:

• CMS-agnostic: you can publish landing pages on a custom domain/URL rather than forcing the client to migrate their site. unbounce.com
• Works alongside existing sites: useful whether the client is on WordPress, Shopify, Webflow, a proprietary CMS, etc.
• Custom HTML/CSS/JavaScript: you can handle unusual client requirements instead of being boxed into a visual builder. unbounce.com
• Integrations: native integrations plus Zapier and webhooks give you a way to connect forms to whatever CRM/automation stack the client uses. documentation.unbounce.com
• Multi-client management: Unbounce explicitly supports managing multiple clients/users/campaigns from one account and duplicating pages between accounts. unbounce.com
• Good for actual landing-page work: A/B testing, Smart Traffic, popups, sticky bars, conversion tracking, etc. unbounce.com

That combination is particularly valuable when you're thinking: “I don't want to learn how every client's CMS handles landing pages.”

How I'd rank the alternatives

For example, current agency comparisons tend to put Webflow toward custom/brand-heavy builds, Unbounce toward performance/paid acquisition, and Instapage toward larger enterprise-oriented workflows. leadpages.com

One important distinction: if by “landing page platform” you mean “I want to build the page in my own tool and then somehow install it inside whatever CMS the client has,” I'd choose differently than if you mean “I want to host the landing page separately and connect it to their existing site/CRM.”

If you tell me the 3–5 CMSs you encounter most often (e.g. WordPress, Shopify, Webflow, HubSpot, Wix), I can give you a much more specific recommendation.

If you're a freelancer dealing with clients on different CMS stacks, I'd optimize for portability and integration flexibility, not just the nicest landing-page editor.

My pick: Webflow

Webflow is probably the most flexible overall for your situation.

Why:

• Custom code + APIs: You can integrate with unusual client stacks rather than being limited to built-in integrations. Webflow exposes APIs for CMS, site management, domains, publishing, and custom code. developers.webflow.com
• Works with existing tech: Webflow explicitly positions itself around integrating with clients' existing marketing/analytics stacks. webflow.com
• Client handoff is unusually good: You can build in your own workspace and transfer the site to the client's workspace later, including its domain and settings. webflow.com
• Reusable systems: You can create components/templates and reuse them across clients.
• More than landing pages: If a client eventually asks for a full marketing site, CMS, localization, etc., you don't have to migrate them to another platform.

Webflow

But there's an important distinction

If by "landing page" you mean a campaign page that needs to sit alongside whatever CMS the client already has, I'd actually consider Unbounce.

Unbounce is very agency/freelancer-friendly: multiple clients, client permissions, duplication, custom scripts, webhooks, Zapier, Salesforce, HubSpot, etc. unbounce.com You can put the landing page on a client's subdomain while their primary site remains on WordPress, Shopify, Drupal, HubSpot, etc. documentation.unbounce.com

Unbounce

How I'd choose

Instapage is particularly strong if your work is heavily focused on paid acquisition; it currently advertises 120+ integrations, personalization, experimentation, heatmaps and A/B testing. instapage.com

For a freelancer, I'd probably keep two tools: Webflow as the general-purpose platform + Unbounce for clients where the landing page needs to remain independent of their existing CMS and performance testing is central.

If you tell me the CMSs you most commonly encounter (e.g. WordPress, Shopify, HubSpot, Webflow, Wix, custom/React), I can narrow this down to the best setup for your workflow.

If you’re a freelancer working across different client CMSs, I’d prioritize a platform that can sit on top of the client’s existing stack rather than forcing you to rebuild their site.

My pick: Instapage

Instapage is probably the most flexible fit for your situation.

Why:

• Works across CMSs — you can publish to WordPress, Drupal, or essentially any custom domain. instapage.com
• Large integration ecosystem — 120+ integrations covering CRM, analytics, advertising, email, ecommerce, automation, etc. instapage.com
• Custom domains make it easy to give each client their own branded landing-page URL. help.instapage.com
• You aren't dependent on the client's CMS theme/page builder.
• Particularly good if your work is paid ads → landing page → lead capture, rather than building the client's entire website.

How I'd rank the main options

Unbounce is arguably the better choice if your specialty is conversion optimization. It has strong A/B testing, dynamic text replacement, popups/sticky bars, and integrations; it also has a WordPress publishing option that keeps the landing-page work separate from the client's WordPress admin. unbounce.com

Webflow is the better choice if by "landing page" you really mean designing substantial portions of the website. It gives you extensive custom-code capabilities and can export HTML/CSS/JS, although exported sites lose Webflow CMS functionality, forms, ecommerce functionality, etc. help.webflow.com

For a freelancer, I'd therefore use:

Instapage → best general-purpose client landing-page platform
Unbounce → best if you're selling CRO/paid-ad landing pages
Webflow → best if you're also responsible for the actual website

If you tell me which CMSs you encounter most often (e.g. WordPress, Shopify, Webflow, Wix, Squarespace, HubSpot, custom sites), I can narrow this down to the platform that will cause you the fewest headaches when handing pages off to clients.

If you’re a freelancer dealing with clients who already use different CMSs, I’d optimize for portability rather than just the prettiest page builder.

My ranking for your use case

🥇 I'd pick Unbounce for you

The big advantage is that the landing page becomes CMS-agnostic. You don't have to learn whether Client A uses WordPress, Client B uses Drupal, Client C uses some obscure proprietary CMS, etc.

Unbounce can publish to custom domains and has integrations/webhooks for connecting to different marketing stacks. It also has a WordPress integration that lets you publish Unbounce pages into a WordPress site without building the page inside WordPress. documentation.unbounce.com

More importantly for freelancing, you can treat the landing page as its own production environment:

Design → publish → connect forms/CRM → hand off/maintain

rather than:

Figure out client's CMS → fight their theme → deal with plugins → discover their CMS has some weird limitation.

Unbounce specifically positions itself for agencies and supports integrations including HubSpot, Salesforce, Zapier and webhooks, which makes it useful when every client has a different stack. unbounce.com

🥈 Instapage if you're doing lots of paid acquisition

I'd choose Instapage over Unbounce if your freelance work is heavily Google/Meta Ads-oriented and you're building lots of campaign-specific pages.

One particularly useful feature for your situation is publishing to WordPress, Drupal, or essentially any custom domain, so the client's underlying CMS doesn't matter much. It also supports publishing to unlimited domains on its platform. instapage.com

🥉 Webflow if you actually want to build the client's website

Webflow is arguably the most flexible website-building environment here. It has extensive app/integration support, CMS functionality, and custom HTML/CSS/JS embeds. help.webflow.com

But that's precisely why I wouldn't make it your default landing-page platform if your clients have disparate CMSs. You're introducing another CMS/site-building environment rather than simply adding a portable landing-page layer.

The distinction I'd use

If your service is:
"I build you high-converting campaign landing pages."
→ Unbounce

If your service is:
"I build and optimize lots of paid-ad landing pages for agencies/brands."
→ Instapage

If your service is:
"I build complete marketing websites and CMSs."
→ Webflow

If your service is:
"I need a cheaper, straightforward landing-page platform for lots of clients."
→ Landingi

There are also 2026 freelancer/agency comparisons that broadly arrive at the same segmentation: Unbounce for conversion-focused work, Instapage for larger/paid-traffic operations, and Webflow for design-led/custom marketing builds. hackceleration.com

For a freelancer specifically, I'd start with Unbounce. The killer feature isn't the editor—it's being able to say "I don't care what CMS your website runs on; I can build the landing page separately and hook it into your existing stack."

If you’re a freelancer handling clients on different CMSs, I’d optimize for deployment flexibility, not just the nicest landing-page editor.

My pick: Webflow

Webflow is probably the most flexible all-around choice for your situation.

Why:

• Works as a standalone site/CMS when a client wants you to manage the whole thing.
• Custom HTML/CSS/JS embeds let you integrate forms, analytics, widgets, booking tools, etc. help.webflow.com
• You can export HTML/CSS/JS/assets and hand the site to a client or host it elsewhere on eligible Workspace plans. help.webflow.com
• Its CMS can import/export content via CSV, which is useful when moving clients around. help.webflow.com
• DevLink gives you a path into React/custom development if you have clients with more sophisticated stacks. webflow.com
• It's particularly well suited to freelancers/agencies that need design control rather than a purely marketing-focused landing-page tool. leadpages.com

The catch: Webflow export isn't a magic "put this on any CMS" button. CMS functionality, forms, ecommerce, localization, etc. don't survive a normal code export, so you'd need to recreate those pieces on the client's platform. help.webflow.com

If your clients' CMSs are all over the place

I'd rank them roughly:

Unbounce is particularly interesting if your clients mostly have existing websites. Its WordPress integration, for example, lets you build the landing page separately and publish it onto the client's WordPress domain without having to work inside their WordPress templates. unbounce.com

Instapage goes even further in the "CMS doesn't matter" direction: it supports publishing to WordPress, Drupal, and custom domains, as well as unlimited domains on the relevant offering. instapage.com

The key distinction

I'd actually choose based on your typical workflow:

Client says:

"We're on WordPress/Webflow/Drupal/HubSpot/Shopify/etc. and just need a high-converting campaign page."

→ Unbounce or Instapage

Client says:

"Can you redesign our marketing site and maybe build some custom stuff?"

→ Webflow

Client says:

"I have 15 clients and need to crank out/manage landing pages for all of them."

→ Landingi / Unbounce

Client says:

"We're spending serious money on Google/Meta ads and need testing/personalization."

→ Unbounce / Instapage

So for a freelancer who doesn't control what CMS the client uses, I'd personally go with Webflow + Unbounce rather than trying to force one platform to do everything. Webflow handles the custom/design-heavy work; Unbounce handles the "bolt a high-converting campaign page onto whatever the client already has" jobs.

If you tell me which CMSs you encounter most (e.g. WordPress, Shopify, HubSpot, Wix, Squarespace, custom), I can narrow this down to the best 1–2 platforms for your actual client workflow.

If you're freelancing across WordPress, Webflow, Shopify, custom sites, HubSpot, etc., I’d prioritize a platform that can live alongside whatever CMS the client already uses rather than forcing a CMS migration.

My pick: Unbounce

Unbounce is probably the best fit for your use case.

Why:

• CMS-agnostic: you can publish landing pages independently of the client's main CMS.
• Custom domains + integrations: it connects to CRMs, email platforms, analytics, Zapier, and supports webhooks, so you aren't locked into one client's tech stack. unbounce.comunbounce.com
• Good freelancer/agency workflow: multiple clients/campaigns can be managed from one account, with permissions and the ability to duplicate work between accounts. unbounce.comunbounce.com
• Reusable components: useful when you're repeatedly building similar pages for different clients.
• CRO built in: A/B testing and optimization are core features rather than something you have to bolt on. unbounce.com
• Custom code/webhooks: particularly valuable when you encounter a client's weird or proprietary setup. unbounce.comunbounce.com

Unbounce

The other two I'd consider

Instapage — arguably the strongest alternative if your clients are heavily focused on paid advertising. It supports publishing to WordPress, Drupal, and custom domains, plus 120+ integrations. instapage.com

Instapage

Webflow — best if by "landing pages" you actually mean full websites/sites that clients may eventually own and maintain. Its design flexibility is excellent, and paid Workspace plans allow HTML/CSS/JS export. But exported sites lose CMS functionality, forms, search, etc., so it's less convenient when you're trying to drop a page into arbitrary existing CMSs. help.webflow.com

Webflow

How I'd choose as a freelancer

Bottom line: for a freelancer who needs one dependable tool across lots of unrelated client environments, I'd start with Unbounce. Its combination of custom domains, integrations, webhooks, client management, reusable assets, and CRO makes it less dependent on what CMS the client happens to use. unbounce.comunbounce.com

If you tell me which CMSs you most commonly encounter (e.g. WordPress + Shopify + HubSpot + custom), I can narrow this down to the best 2–3 options for your exact workflow.

If you’re a freelancer dealing with clients who already use different CMSs, I’d prioritize integration flexibility + custom code + client handoff, rather than just the prettiest landing-page editor.

My picks

For your specific situation, I'd lean Duda or Webflow.

Duda is particularly interesting for a freelancer because it's built around professional/client workflows: one dashboard for multiple sites, granular client permissions, reusable sections/templates, CMS-connected content, custom HTML/CSS/widgets, integrations, Zapier, and a REST API. It also supports white-labeling if you eventually want clients to experience the platform as your own service. www.duda.co

Duda

Webflow is my choice if your priority is creative/design freedom and being able to build sophisticated sites rather than merely landing pages. Its CMS is designed to be composable, with APIs, integrations, custom code, and connections to external tools. webflow.com

Webflow

Unbounce wins if what you actually mean by "landing page platform" is campaign pages that need to convert. It has strong agency workflows, A/B testing, reusable assets, custom scripts, permissions, and integrations with things like HubSpot, Salesforce, Zapier and webhooks. unbounce.com

Unbounce

The important distinction

If your workflow is:

"Client has WordPress/Wix/Shopify/Webflow/etc. → I need to make them a landing page without rebuilding their whole site"

I'd actually choose Unbounce.

If it's:

"I build and maintain entire client websites across different businesses/CMS requirements"

I'd choose Duda.

If it's:

"I want maximum control over design, interactions, CMS structure and custom development"

I'd choose Webflow.

For a solo freelancer managing many heterogeneous clients, Duda is probably the most operationally flexible; Webflow is probably the most creatively flexible.

If you’re a freelancer working across different client CMSs, I’d optimize for “I can build once, deploy anywhere, and hand it off cleanly” rather than simply the prettiest landing-page editor.

My ranking

My pick for your particular situation: Instapage. It can publish pages to WordPress, Drupal, or custom domains, and supports publishing to unlimited domains. It also has 120+ integrations and built-in client collaboration. instapage.com

That means you don't have to care whether Client A uses WordPress, Client B uses Drupal, and Client C has some proprietary CMS—you can keep the landing page in your own workflow and connect it to their environment.

But there's an important distinction

If by "flexible" you mean maximum control over the actual site, I'd choose Webflow instead. It gives you much deeper control over HTML/CSS/JS, CMS structures, APIs, integrations, and custom functionality. It also has freelancer/agency-specific workflows for client permissions, billing, site transfer, and handoff. webflow.com

If you're primarily doing ad landing pages, though, I'd lean Unbounce. It is particularly strong for A/B testing, campaign variants, scripts, webhooks, CRM integrations, and managing multiple clients from one account. unbounce.com

So I'd simplify it to:

• Different CMSs / easiest deployment → Instapage
• Paid ads + CRO → Unbounce
• Full website/design freedom → Webflow
• Simple client lead-gen → Leadpages
• High-volume freelancer/agency work → Landingi

If you tell me which CMSs your clients typically use (e.g. WordPress, Shopify, HubSpot, Webflow, Squarespace, custom), I can narrow this down considerably and tell you which one will cause the fewest headaches.

For a freelancer managing clients across different CMS environments, the “most flexible” landing page platform is usually one that doesn’t force you into a specific CMS, supports fast client handoff, and can integrate with whatever stack the client already has.

Here are the strongest options by workflow:

For a freelancer, I’d usually rank them:

1. Webflow — best overall freelancer platform

Good if you work with varied clients because you can:

• build custom designs without touching code
• create CMS-driven pages
• hand clients a visual editor
• export code when needed (with limitations)
• host yourself or let the client own the account

It’s especially strong for agency-style work where every client has a different brand.

2. Framer — best for speed + modern design

If your clients mostly need:

• SaaS landing pages
• startup sites
• marketing pages
• quick iterations

Framer can get you from design to live site very quickly.

3. Unbounce — best if the goal is leads

If clients care more about:

• PPC campaigns
• conversion rates
• testing headlines/forms
• running many campaign pages

Unbounce may outperform a general website builder.

A practical freelancer stack could be:

• High-ticket custom clients: Webflow
• Fast startup launches: Framer
• Paid ads / lead gen: Unbounce
• Existing WordPress clients: stay in WordPress and integrate landing pages there

If you’re juggling many different CMS setups, I’d lean toward Webflow as your default, because it’s the closest thing to a “universal client delivery platform” while still looking professional.

If you’re a freelancer dealing with clients on different CMSs, I’d prioritize a platform that can publish independently of the client’s underlying CMS, supports custom domains/code, and has strong integrations.

My picks

My overall choice for your situation: Instapage. It explicitly supports publishing landing pages to WordPress, Drupal, or custom domains, so you aren't forced to care what CMS a client's main site uses. It also has reusable blocks, collaboration, and integrations for passing lead data into the client's marketing stack. instapage.com

Unbounce is a very close second—and I'd actually choose it over Instapage if your freelance work is heavily focused on paid ads, A/B testing, and CRO. It supports custom code, webhooks, CRM integrations, and managing multiple clients from one account. unbounce.com

One important distinction

If by "landing page platform" you mean "I want to build the page once and drop it into whatever CMS the client happens to use", I'd go:

Instapage → Unbounce → Webflow

If you mean "I want to build and manage complete client sites, with each client getting their own CMS", I'd look much harder at Dorik or Webflow. Dorik is particularly interesting for freelancers because its Agency offering includes white-labeling, client permissions, unlimited client sites, API access, custom domains, and site ownership transfers. dorik.com

So, in your shoes:

• Landing pages only: Instapage
• Landing pages + serious CRO: Unbounce
• Full custom sites: Webflow
• Many small/medium client sites + white-labeling: Dorik
• Clients already standardized on WordPress: WordPress-native builder

If you tell me which CMSs you commonly encounter (e.g. WordPress, Shopify, HubSpot, Webflow, Wix, Squarespace, custom), I can narrow this down to the best 1–2 options for your workflow.

If you're a freelancer dealing with clients who use different CMSs, I'd prioritize a platform that can sit on top of whatever CMS they already have, rather than one that forces you to migrate them.

My picks

My overall pick for your situation: Unbounce. Unbounce

Unbounce is particularly well suited to a freelancer because the landing page doesn't need to become the client's CMS. You can build the page in Unbounce, add custom scripts/code, connect forms directly to CRMs, and use webhooks when you need to connect to something unusual. It also has agency-oriented client/account management and lets you duplicate work between accounts. unbounce.com

That makes it relatively painless when Client A is on WordPress, Client B is on Shopify, Client C is on HubSpot, and Client D has some proprietary CMS.

Webflow is my choice if you mean "most technically/design flexible" rather than "best landing-page layer." Its CMS has APIs, dynamic custom code, and CMS-driven embeds, and Webflow supports custom HTML/CSS/JS. webflow.com The downside is that you're more often building the site itself in Webflow rather than simply dropping a landing-page system on top of whatever the client already uses.

Duda is particularly interesting if you're managing a growing roster of clients. Duda It has reusable sections/templates, granular client permissions, a client dashboard, white-labeling, and an API for automating site/content workflows. www.duda.co

I'd choose based on your workflow

• "I build ads → landing page → CRM, regardless of client's CMS." → Unbounce
• "I want pixel-level design control and sometimes build the whole site." → Webflow
• "I manage 10s/100s of client websites and want a standardized agency system." → Duda
• "Most of my clients are already WordPress." → WordPress + a good landing-page builder

One important distinction: if by "different CMS setups" you mean you need to publish the same landing-page design directly inside WordPress, Shopify, Webflow, HubSpot, etc. without changing the client's existing site, I'd lean even more strongly toward Unbounce.

If you tell me the 5–6 CMSs you encounter most often, I can compare the platforms specifically for those integrations and tell you which setup will cause you the least client-side friction.

If you’re freelancing across different client CMSs, I’d optimize for portability + integrations + client handoff, rather than picking the prettiest builder.

My ranking

My pick for you: Unbounce if your main job is landing pages.

The big advantage is that Unbounce doesn't really care what CMS the client's main website uses. You can run the landing page separately, connect forms/leads to their existing CRM/marketing stack, and use custom scripts or webhooks when the client's setup gets weird. It supports integrations including Salesforce, HubSpot, Mailchimp, Zapier and custom webhooks. unbounce.comdocumentation.unbounce.com

It's also unusually freelancer/agency-friendly: you can manage multiple clients separately, control permissions, and copy pages/assets between client accounts. unbounce.comdocumentation.unbounce.com

Unbounce

When I'd choose something else

Webflow — choose this if you're frequently doing entire marketing sites, not just campaign landing pages. It's much more of a CMS/site-building environment, with extensive custom HTML/CSS/JS capabilities and an ecosystem geared toward freelancers and agencies. help.webflow.com

Webflow

Framer — I'd choose this if your clients care heavily about design, animation and fast iteration. It has its own CMS, reusable systems and agency/client collaboration, plus custom code for third-party scripts. www.framer.com

Framer

The key distinction: if you're thinking "I need to drop a landing page onto whatever CMS my client happens to have" → Unbounce is probably the safest freelancer tool. If you're thinking "I need one platform where I can build the client's whole web presence" → Webflow is more flexible.

If you tell me the CMSs you most commonly encounter (WordPress, Shopify, HubSpot, Webflow, Squarespace, custom, etc.), I can tell you which setup gives you the least friction for each one.