Tester Army

TesterArmy uses AI agents to test web and mobile apps by navigating user flows and checking their behavior. <!-- hacklab:yc-profile -- YC company profile Test your app with AI,…

Website

About Tester Army

TesterArmy uses AI agents to test web and mobile apps by navigating user flows and checking their behavior.

YC company profile

Test your app with AI, catch bugs before users do

TesterArmy is an AI agent that tests websites and mobile apps. It monitors production on a schedule and runs automatically on every GitHub Pull Request, delivering screenshots, recordings, and actionable bug reports.

Describe tests in plain English. The agent handles login flows, OAuth, and OTPs, no scripts to write or maintain. We catch the regressions and UX issues that code review misses.

YC batch: Spring 2026
Founded: 2026
Team size: 6
Location: Warsaw, Poland
Country: PL
Status: Active
Industry: B2B
Stage: Early
YC partner: Pete Koomen

Founders

Szymon Rybczak — Founder/CEO

Co-founder & CEO of TesterArmy (YC P26).

Youngest ever contributor to React Native (at 16), maintained open-source libraries with 3M+ downloads weekly.

Worked on v0 iOS with Vercel. 5+ years of commercial experience. Working professionally since 14.

LinkedIn · X

Oskar Kwaśniewski — Founder

Co-founder & CTO of TesterArmy (YC P26).

React Native Core Contributor (100+ PRs merged), created 5+ open-source libraries with over 2.5M downloads.

Worked with Vercel, Meta, AT&T, and more.