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Coding agents write more of our code every month — but they verify it against mocks and unit tests. Giving an agent a full-stack preview environment per branch changes what it can actually ship.

Vercel is the gold standard for frontend deploys. If you need a preview environment with a real backend and a real database on every branch, here is why teams switch to BTS.

Netlify mastered static-site deploys and edge functions. If your app needs a real backend, a real database, and a real environment per pull request, BTS is the alternative that fits.

Railway is a great home for production services with attached databases. BTS is purpose-built for the branch-preview workflow — one URL per branch, a real database per preview, flat monthly pricing.

Fly gives you full control over VMs, regions, and networking. BTS gives you zero-ops branch previews that just work. Here is how they differ and when each fits.

Render is a polished Heroku successor with a generous free tier. Its preview-environment story is solid but expensive at scale. BTS is built specifically for this workflow at a fraction of the cost.

Heroku invented review apps. Fifteen years later, the idea is still great; the pricing and the product around it are not. BTS is what review apps look like if you build them today.

Most preview platforms share a single database across every branch. Here is why that breaks down at scale, and how per-branch databases change the preview workflow.

The mechanics of giving every pull request its own working URL — what you need, what to skip, and how to avoid the common pitfalls.