Recruiting for theintelligence era.

Recruit only themost talented.

Post one role, then watch candidates enter a live sandbox where every action is tracked. Proto scores task outcomes, surfaces hidden signal, and lets you compare applicants side by side before you decide.

Everything builtwithin a sandbox.

Applicants complete real tasks inside a sandbox that mirrors your product, engineering, data, and overall vision. You see how they think, where they trade off, and who can actually execute before the interview loop decides.

Tracks. Compares.Chooses.

Replay how each candidate worked, not just what they submitted. Head-to-head scorecards on the same rubric, then a ranked shortlist when you're ready. The hire gets obvious before anyone schedules a panel.

Post challenges,hire the best.

Companies publish open challenges in product, ops, engineering, etc., and any applicant can jump in. Proto captures every submission, scores the work, and surfaces the strongest talent before you ever open a req.

Analyzes in seconds,delivers to phone.

Recruiters review candidate evals on mobile the moment work lands. Scores, replays, and shortlists sync to your phone so you can move on strong talent and fill roles whether you're at your desk or on the road.

See if submissionsfit your product.

Take an applicant's prototype, gather real user feedback, and simulate it back inside your product before you ship. Proto shows how the idea lands with your users and where it might fit in your roadmap.

Built on topof your stack.

EMRs, billing platforms, and clinical tools you already rely on, connected without ripping out what is in place. Proto meets your team where they work instead of forcing a rip-and-replace.

Validate everysubmission.

Proto stress-tests each candidate's work against your rubric, replays how they executed, and flags what clears the bar before anyone lands on the shortlist.

Your shortlist,always current.

Proto keeps a live ranked list of every candidate who cleared your sandbox bar. Scores refresh as new work lands, so hiring managers always know who to call next without rebuilding a spreadsheet.

More about Proto

Proto for Recruiters

James · Jul 2026

Proto for Applicants

Matthew Lisondra · Jun 2026

Proto Challenges

Team, Product · May 2026

Integrations

Team, Engineering · Apr 2026

Agent memory

James · Mar 2026

The ambient inbox

Matthew Lisondra · Feb 2026

Research with users

Team, Research · Jan 2026