YC Spring 2026 (P26) company

TesterArmy

Test your app with AI, catch bugs before users do

b2bengineering, product and designopen source23 public signals

About TesterArmy

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.

Public traction evidence

Each signal links to the public source used for attribution.

  1. Hacker News

    Launch HN: TesterArmy (YC P26) – Agents that test web and mobile apps

    Hey HN - we’re Oskar, Szymon, and Piotr, and we’re building TesterArmy ( https: tester.army ). TesterArmy is an agentic testing platform that runs end-to-end checks before deployment and in production. Instead of wasting hours on manual testing or maintaining static scripts, we...

  2. X

    this is what AUTOMATED UI testing looks like

    this is what AUTOMATED UI testing looks like

  3. X

    A week ago, we launched on Hacker News. We got 131 upvotes and 69 comments. Over 1.5k new users. Here are a couple of learnings about it: • Never use AI to write the post; the HN crowd will notice it. • Make sure your app can be tried for free • Address how it's different Show more

    A week ago, we launched on Hacker News. We got 131 upvotes and 69 comments. Over 1.5k new users. Here are a couple of learnings about it: • Never use AI to write the post; the HN crowd will notice it. • Make sure your app can be tried for free • Address how it's different Show...

  4. X

    one of our first full-time hires was a designer, because taste and design quality matter more than ever it's easy to build things now, b...

    one of our first full-time hires was a designer, because taste and design quality matter more than ever it's easy to build things now, but designing them so they feel clean, get recognized and stick in people's heads is the hard part, and it's even harder in devtools where your...

  5. X

    YC P26 reunited in Warsaw 🇵🇱

    YC P26 reunited in Warsaw 🇵🇱

  6. X

    the idea for Scout came from a bunch of conversations we had with teams that are shipping external APIs. scout allows you to test thousa...

    the idea for Scout came from a bunch of conversations we had with teams that are shipping external APIs. scout allows you to test thousands of endpoints in a matter of minutes. ship your API with confidence

  7. X

    https://t.co/zXM43MeyKt

    https://t.co/zXM43MeyKt

  8. X

    time to release 1.0 after this

    time to release 1.0 after this