When you sign up for a website platform, the pitch is always simple: pay a monthly fee, get a working website. What the pitch doesn't mention is what happens when you want to leave.

Platform lock-in is the set of frictions that make it hard to move your website off the platform you built it on. Some of them are technical (you can't export the site). Some of them are contractual (you lose data when you cancel). Some of them are practical (migrating would cost more than the platform itself). Lock-in isn't usually the result of malice. It's the result of platforms being optimised to keep customers rather than to help them leave gracefully.

This post is the honest accounting of what lock-in looks like on each of the major platforms, and what it actually costs when you decide to get out.

How platform lock-in works, mechanically

Every website platform makes money by keeping customers. The longer you stay, the more profitable you are. This creates a predictable set of incentives:

Make it easy to get in — free trials, template galleries, drag-and-drop builders, AI-powered onboarding
Make it pleasant to stay — new features, regular updates, proactive support
Make it expensive to leave — incomplete export tools, loss of data on cancellation, no migration path

The first two are legitimate and useful. The third is the problem. It only becomes visible the moment you decide to leave.

Lock-in on Squarespace

Squarespace's lock-in is moderate. You can export basic site content — blog posts, pages as HTML, images — but you cannot export:

The visual design. No template, CSS or layout export.
Custom interactions or animations you configured in the editor.
Commerce data in a form that's directly importable to another platform. Products can be exported as CSV but customer data, orders, and transaction history are trickier.
Member/subscription data from the Squarespace Members feature in a portable form.
Your URL structure — Squarespace's routing is proprietary and your next platform will have different paths, which means writing a full 301 redirect map.

When you cancel your subscription, the site goes offline within a few days. Not "frozen and downloadable later" — offline. Anything you haven't exported by that date is lost.

Real cost of leaving Squarespace for a typical small business: $5,000–$15,000 for a full rebuild on a new platform, because you're not migrating, you're starting over. The old site's content gets re-typed or re-imported manually, the design gets rebuilt from scratch, the URLs get redirected.

Lock-in on Webflow

Webflow is more flexible than Squarespace in one direction and more restrictive in another.

Flexible: Webflow lets you export your site as static HTML/CSS/JavaScript. You can technically host the exported files on any web host. This is unusual — most platforms don't let you do this.

Restrictive: the Webflow CMS is not included in the export. If your site uses Webflow's CMS for dynamic content (blog posts, product listings, team members, case studies), exporting the site gives you a static snapshot of the current content, but it's frozen. You can't update it after export without running it through Webflow again.

Webflow Interactions (the animation system) also don't export cleanly. They rely on Webflow's runtime JavaScript and may break in subtle ways when hosted elsewhere.

So the flexibility is real but only applies to sites that don't rely heavily on the CMS or Interactions. Which is to say, to simple marketing sites but not to most real business sites.

Real cost of leaving Webflow for a typical small business: $6,000–$18,000. The static export helps with the design but you're still rebuilding the CMS integration and the dynamic content management.

Lock-in on Wix

Wix's lock-in is severe. Wix sites cannot be exported at all. There is no export tool, no HTML export, no content archive. If you want to leave Wix, you rebuild everything from scratch on another platform while copying content manually.

This is a deliberate product decision by Wix. It's been the case for the platform's entire history and shows no sign of changing. If you're considering Wix, the lock-in should be treated as permanent — once you're in, your exit strategy is a full rebuild.

Real cost of leaving Wix for a typical small business: $7,000–$20,000. Same story as Squarespace only worse, because you don't even get the basic content export.

Lock-in on Shopify

Shopify's lock-in is interesting because it's split. The storefront (the visual layer, the theme) is replaceable — Shopify lets you build on Shopify's backend with a custom frontend (Shopify Hydrogen or via their API). The backend (product data, customer accounts, orders, payments) is the actual lock-in.

Leaving Shopify entirely means exporting products as CSV, losing most of the transaction history, losing subscription/recurring billing data, and rebuilding the entire checkout flow on something like Stripe plus a custom database.

Real cost of leaving Shopify for a typical small business: $15,000–$60,000 depending on store complexity. More than any other platform because Shopify has genuinely deep integration with payment processing and order management that's hard to replicate.

The hidden costs that affect every platform

Beyond the rebuild cost, leaving any platform has ongoing invisible costs that nobody mentions upfront.

SEO authority loss

When URLs change, Google has to re-crawl, re-index, and re-rank. Even with perfect 301 redirects, there's a 4–12 week window where rankings dip before stabilising. If your site gets meaningful organic traffic, this dip can cost 20–40% of monthly enquiries for the duration.

A well-executed migration with proper redirect mapping keeps most of the ranking authority intact. A poorly executed one can lose 50%+ of it permanently.

Email delivery reputation

Platforms like Squarespace handle your form submissions and sometimes your newsletters. When you leave, you're setting up email infrastructure from scratch — which means building sender reputation again, warming new IPs, and potentially getting flagged as spam for the first few weeks.

Analytics history

Moving platforms usually means moving analytics. Your historical data in Google Analytics (or whatever tool you used) stays intact as long as you keep using the same GA account, but the URL patterns change. Reports that filtered by old URL patterns need rebuilding.

CMS retraining

Your team learned how to use the old CMS. Moving platforms means relearning everything. Bookmark the new editor, learn the new publishing workflow, rewrite the internal documentation. For teams with multiple content editors, this can consume dozens of hours across the first month.

Domain and DNS risk

DNS migrations are usually smooth but can go wrong. A bad DNS change can take the site offline for hours. A good agency handles this carefully. An inexperienced one may not, and downtime during a migration is expensive if your site is a real revenue source.

What lock-in-free looks like

The opposite of lock-in is a custom-coded site on a portable stack. Specifically:

The code lives in a git repository you own
The CMS is a portable system like Sanity, Payload, Contentful, or Directus that stores your content in a format you can export anytime
The hosting is a commodity service (Vercel, Netlify, Cloudflare Pages, any major cloud) that you can switch between in an afternoon
The domain is registered to you directly, not routed through the platform
The analytics, email, and integrations use standard tools (Google Analytics, SendGrid, Stripe) rather than platform-locked equivalents

A site built like this can move hosts in a day, can have its CMS swapped without rewriting the frontend, and has no single vendor who can hold it hostage. It costs more upfront than a platform subscription but the lock-in cost is zero.

The honest calculation

If your site is on a platform right now, run this calculation:

Monthly platform cost × 12 × years you expect to keep the site = total subscription spend
Typical rebuild cost if you left in year N = $8,000–$20,000
Cost of custom build today = $8,000–$20,000 one-off

For most small businesses, the break-even is year 2–4. If you're planning to run the business for more than 4 years, the platform path often costs more total than a custom build — because you'll eventually pay both the subscription AND the rebuild.

The cheap-upfront path is expensive in the long run. The expensive-upfront path is cheap in the long run. Both are legitimate choices, but you should make them consciously, knowing the math.

What to do if you're already locked in

Three options.

Option 1: Stay until something breaks. Accept the lock-in, keep paying the subscription, budget for a rebuild in 2–3 years when the platform either raises prices or you hit a ceiling you can't work around. This is the default for most small businesses and it's not unreasonable.

Option 2: Migrate now, before the lock-in deepens. The longer you stay on a platform, the more content and configuration accumulates, which makes the eventual migration more expensive. Migrating in year 2 is cheaper than migrating in year 5. If you know you'll eventually want custom, sooner is cheaper than later.

Option 3: Migrate to a hybrid stack. For some businesses, the right answer is headless — keep the existing backend (e.g., Shopify's commerce engine) but replace the frontend with custom code. This removes half the lock-in while preserving the parts that work.

If you want us to run the lock-in calculation on your specific situation, book a free audit. We'll look at what you're on, what you'd pay to leave, and what makes sense based on your business model. Honest recommendation, whether or not it's us doing the rebuild.