Built an app with AI? Make sure it actually works.
From fast AI-built drafts to product work you can trust.
AI coding tools can build a first version fast. Simsa checks whether that result does what you asked — and helps you decide what to accept, fix, or run again, with evidence.
Simsa is in open beta — everything is free while we build it out. You'd be one of the early members, and what you run shapes what it becomes.
Start from anything
Bring an idea, a product brief, a product link, a code home (GitHub), a submitted code change, or an AI-built app. Simsa turns it into a step-by-step checking flow.
What Simsa gives you
Left alone, AI-built output stays at "it seems to work." Simsa turns it into results you can check, compare, and stand behind.
How a check runs
- See what you have. An idea, a brief, code, or an AI-built draft.
- Turn it into checking items. The things the result has to get right.
- Check the result against them. With evidence, not gut feeling.
- Decide: accept, fix, or run again. Compare runs and choose.
- Keep the evidence and history. So every decision stays reviewable.
For everyone building with AI
You don't need to be a developer. Founders, planners, and teams use Simsa to put a checking layer on top of fast AI-built drafts — so you can tell what's actually ready.
Join the open beta
No waitlist, no invite code — bring an idea, a brief, or an AI-built app and start checking it today. Everything is free during the beta.
Being early matters here: the checks beta members run are what teach Simsa which failures actually happen in AI-built apps. If something feels off or missing, tell us — we read every note.
Common questions
- Is it free?
- Yes — Simsa is free during the open beta. No card, no limits beyond a light daily cap.
- How is my data handled?
- Your work stays in your browser and your account. Reviews are only kept if you opt in, under an anonymized ID — we share patterns, never people.
- Which AI tools does it support?
- Anything you built with — Claude Code, Codex, Lovable, v0, Bolt, Cursor, Replit, Windsurf, and more. You can also just paste a plan or connect a GitHub repo.
- Do I need to know how to code?
- No. Simsa is built for non-developers — describe what your app should do in plain language and it checks the result for you.
- How do I get in touch?
- Use the in-app feedback button (bug, question, or idea) — we read every note.