Hire people with real proof of work.
See exactly how they build with AI — what they ship, how they work, hour by hour — before you ever interview. Real, tracked, impossible to fake. Hire engineers you've already seen deliver, instead of gambling on a résumé and a 45-minute screen.
$99/mo · cancel anytime · contact credits refunded on reply · Already have a seat?
“AI has made it easier to generate applications, but it hasn't made it easier to identify the right talent.”
— Dawn Fay, Robert Half
Run X-ray diligence before you commit.
Open a builder's profile and you see the actual work: hours logged, how many days they've been active this month, how long they've sustained a single project, tokens burned, the AI models and tools they reach for, the languages they ship in, what they finish versus abandon. Filter the whole pool by minimum tokens, build count, active days, language, tool, or time period, and see exactly who clears your bar. This is the kind of signal you normally can't get even after you hire — and by then a wrong call is expensive. Here you get it for free, before the first call.
And none of it can be polished for the interview: every number is captured automatically from the terminal as they build — never typed into a profile. Faking it would mean doing the work.
Every signal you screen on is gamed.
The proxies you've trusted for a decade all broke at once — and every one of them is now for sale or trivially faked.
of US HR leaders say AI-generated applications have slowed hiring. Applications have roughly tripled since 2021; 65% say AI-enhanced résumés make skills impossible to verify.
Robert Half, 2025 (n=2,000+) · Ashby
buys a star. Six million fake stars were found across 18,617 repos — and AI/LLM repos were the single largest category.
Carnegie Mellon University, ICSE 2026
of AI cheaters score above the pass line and advance undetected. Cheating in technical interviews more than doubled in the second half of 2025.
Fabric, 19,368 interviews
of hiring managers can quickly detect an AI résumé. 71% of engineering leaders say AI makes coding skills harder to assess in 2026.
Fabric · Resume Genius
The old way guesses. The new way sees.
We don't ask builders what they did.
We already know.
Every stat on a builder's profile is captured automatically, straight from their terminal, the moment they build. There's no form to fill in, no number to type, no screenshot to upload. Faking it would mean doing the work.
Stars, followers, and résumé bullets can all be bought. A 2.3-million-token build can't.
The good ones are already here — and you can see why.
Real builders, ranked by tracked work — not a marketing list. Every name below is here because their proof accrues on its own, every session, whether or not anyone's looking. That includes the strong engineers who never post, never apply, and never show up on a job board.
15.3K builds from 224 builders — every stat tracked, none typed in.
From a hunch to a hire.
No black-box match score, no pay-to-rank. You set the bar on real, tracked work — and reach the builders who clear it directly.
Filter on real work
Stop guessing from résumés. Filter builders by tokens, build time, languages, builds shipped and the tools they live in — every number captured at the source, nothing typed in.
Post your role, invite the match
Define exactly what 'can build this' looks like, then invite the builders who already clear it — including the strong ones who never post or apply anywhere.
Message them directly
Reach the builder in the app — no gatekeeper, no application black hole. Every contact credit is refunded the moment they reply, so you only ever spend on conversations that actually start.
The most selective firm in tech now evaluates builders on their AI sessions — not their résumé.
Y Combinator built Paxel — a tool that reads your Claude Code and Codex sessions to see how you build with AI, and uses it to source founders. The smartest money in tech already decided that AI sessions beat résumés. Promptbook brings that signal to your hiring.
Not affiliated with or endorsed by Y Combinator. Referenced as public category validation.
Stop interviewing fiction.
Hire on proof, not paper. Reply-refunded contact credits mean you only pay for conversations that actually start — and you never pay for placement, rank, or visibility.
One mis-hire costs far more than a seat. A senior-engineer mis-hire runs ~$31k all-in; a bad hire burns roughly 30% of first-year salary. You're paying to never interview fiction again.
What you'll never pay for: placement, rank, or visibility. No pay-to-rank, ever.
Self-serve. Cancel anytime, billed securely by Stripe. Everything below is included.
- ✓Search the full builder poolFilter on real, tracked work — tokens, build time, languages, builds shipped, active days, days-on-project. Nothing typed in.
- ✓Post offers gated by real proofJobs, co-founder, investment, beta testers, or collaboration. Set a threshold on tracked work — only builders who genuinely clear it can respond. No résumés, no spray-and-pray.
- ✓30 credit-DM invites / monthReach builders direct, gated by real tracked stats. Each credit is refunded the moment they reply — you only pay for conversations that start.
- ✓Your verified org profile + directory listingA public page at /org/your-company and a spot in the Organizations directory, so builders can see exactly who's reaching them.
- ✓Saved lists & searchesKeep the builders and the searches you run most, ready to revisit.