Launching today
Falken
The AI app builder that tests its own work
4 followers
The AI app builder that tests its own work
4 followers
Every AI builder generates code. Falken proves it works: an independent reviewer agent tests each build against your request and the builder rebuilds until it passes — or escalates to a stronger model. Watch the agent team work in real time.
Hey Product Hunt 👋 I'm Markus, exploring new things
I've tried most of the AI app builders. They're magic for the first 80% — then you hit the wall: the preview is blank, an import is broken, a button does nothing, and you're back to copy-pasting error messages hoping the next generation fixes it.
So I built Falken around one idea: the AI shouldn't just generate your app — it should verify it actually works, and rebuild until it does.
Under the hood, every build runs as a small team of agents (a coordinator plus specialists for code and design) on Claude. They build, grade the result against a rubric, catch what's broken, and iterate — before you ever see it. You describe an app or website, and you get one that actually runs.
A few things I'm proud of:
Verify-and-rebuild loop instead of one-shot generation
Attach images or docs as references or specs
Remix any public app to start from someone else's idea
It remembers lessons across your own projects
Free to try — 25 credits, no card. I'd genuinely love your brutal feedback: what breaks, what's confusing, what you wish it did. 🦅
Saw it catch a buggy response and push the builder back through twice before passing, felt like watching a real code review unfold. The transparency of watching the agent test and rebuild live is the kind of thing I wish every AI tool had.
@emircan31074 That's exactly the moment I built Falken for — thanks for calling it out, Emircan Most tools hide the failures and just hand you a broken preview; I wanted the reviewer catching its own mistakes to be the part you actually see. I'm always hunting for the cases where it pushes back two or three times before it passes.
the live view of the reviewer and builder going back and forth is genuinely satisfying, feels like watching two people actually collaborate instead of just clicking generate
@turkbayyig96068 Love that this landed for you, Yiğit 🙏 That builder/reviewer back-and-forth is the whole idea — one agent generates, another grades it against a rubric and sends it back until it actually runs, so you're not the one left finding the bug.
Happy to finally share this — it started as a weekend project and turned into the AI builder I actually wanted to use. Would love your honest take: build something and tell me where it breaks. 🦅