For AI-built apps
Your app works in the demo.
Here's what paying customers add.
You built something real with AI — it looks right, it clicks through, people are impressed. Then someone says “I'd pay for this,” and the question changes: can it charge a card correctly, keep each customer's data private, and stay up while you sleep? That gap between a demo and a business is well known — and it's mostly invisible work. useDeploy is that invisible work, already done: the boring, dangerous parts of a SaaS, built and tested so your app can sit on top.
The invisible 80% of a real app
What you see in a demo — screens, buttons, data appearing — is the smaller part of a production app. The bigger part is invisible: what happens when a payment notification arrives twice, when a customer changes their password on a shared computer, when the server restarts mid-task. Infinity Sky AI describes it exactly: “That last 20% — the part that makes your SaaS actually ready for paying customers — takes 80% of the effort, and that last 20% is where vibe coding starts to struggle.” The stakes aren't abstract, either. In one widely shared story on news.ycombinator.com, a vibe-coded SaaS leaked its user list, a hacker found the Stripe key “and issued every customer a refund” — the founder is now hiring a developer to rebuild. Once money is involved, the invisible part is the product.
What your app needs before it can charge anyone
Payments that can't double-charge
Payment companies send the same notification more than once — that's normal. Your app has to notice the repeat and ignore it.
Logins that can be shut off
Password changed? Old sessions must stop working — everywhere, immediately.
Privacy between customers
Customer A can never see customer B's data — enforced by the system itself, not by hoping nobody tries.
Emails that arrive
Password resets, receipts, invites — sent reliably, within seconds, every time.
Protection from floods
Limits that stop one bad actor — or one bug — from overwhelming your signup or login.
A record when things break
Logs and alerts, so you find out about problems from your tools instead of from an angry customer.
See a duplicate payment get caught
Here's one invisible protection doing its job. A payment provider delivers the same “subscription paid” event twice — routine on the internet. useDeploy recognizes the repeat by its order ID and drops it before it can touch your data. Your customer is charged once, credited once, emailed once. Nobody had to remember to handle this: it's built in.
1 [webhook] payment.approved order=ord_8231 received
2 [billing] subscription activated for org_142
3 [webhook] payment.approved order=ord_8231 received (again)
4 [billing] duplicate delivery for ord_8231 — skipped
5 [email] receipt sent once ✓
The dangerous parts, already solved
Take payments your way
Stripe, MercadoPago (real subscriptions), and Polar are all built in behind one system — pick what your market uses.
Accounts, teams, permissions
Sign-up, sign-in, password reset, two-factor, teams with roles and invitations — the full account layer, finished.
Work that finishes itself
If the server crashes mid-task, the task is saved and retried — receipts and updates never just vanish.
One-command deploy
Docker, Railway, or Dokploy — with database updates applied automatically each time you deploy.
Tested like it matters
Over 450 automated tests, plus a robot that signs up, makes a team, invites someone, and subscribes — on every single change.
Help in three languages
Step-by-step documentation in English, Spanish, and Portuguese.
Your migration path — whichever tool built your app
The move is the same regardless of which AI wrote your code, because you keep the part that's uniquely yours — the screens, the flows, the idea — and replace the part that's the same in every SaaS. Practically: your app's frontend keeps its look and connects to useDeploy for accounts, teams, payments, and emails. If your current tool exports code, your pages come along; if it doesn't, you rebuild the screens on useDeploy's foundation with the AI tool of your choice — either way, the expensive engineering underneath is no longer your problem. One harder truth worth naming: an entire rescue industry now exists to patch broken AI-built apps, with jobs typically quoted in the thousands of dollars. Moving onto a tested foundation once costs less than paying to patch an untested one repeatedly.
Honest answers before you commit
I'm not really a developer. Can I do this?+
What does “production-ready” actually mean here?+
Do I have to throw my app away?+
What does it cost to run?+
One license. Two ways to own it.
CORE
Founder
A frozen snapshot of UseDeploy. Yours forever, no updates.
- Frozen-version zip download
- Full source, commercial use, unlimited projects
- All 800+ tests · all docs pages
- 14-day refund
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Always the latest UseDeploy. Re-download every release, free.
- Latest-version zip — re-downloadable forever
- Every future release at no extra charge
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- All 800+ tests · all docs pages
- 14-day refund
The boring parts are done. Ship the rest.
Your idea deserves a foundation that can take real money from real customers. It's built, tested, and waiting.