TesterArmy raises €1M pre-seed for AI QA testing agent

TesterArmy, a Y Combinator-backed startup building an AI QA testing agent, has raised €1 million in pre-seed funding. The round was announced on September 15, 2026.

What TesterArmy Does

TesterArmy is building an AI QA testing agent that continuously monitors websites and mobile apps in production and on every GitHub pull request. The company's approach centers on letting testers describe checks in plain English rather than writing code or maintaining brittle test scripts.

The agent then drives real browser and app sessions, handling login, OAuth, and OTP flows. After running a check, it returns screenshots, recordings, and bug reports.

This combination — natural-language test authoring plus real-session execution — positions TesterArmy in the emerging category of AI-driven quality assurance tooling, where the goal is to reduce the manual effort required to keep production applications verified across every code change.

The Team

TesterArmy was founded by Szymon Rybczak, Oskar Kwasniewski, and Piotr Matyjasik. The company is based in the San Francisco Bay Area and participated in Y Combinator's Spring 2026 batch.

Traction

According to the company, TesterArmy serves more than 20 production customers. Named customers include bolt.new, CodeCrafters, and Novu.

The Investors

The pre-seed round includes a broad group of investors:

Zeno Rocha
Charlie Cheever
Guillermo Rauch
Y Combinator
Script Capital
Eight Capital
Tomasz Karwatka
Piotr Karwatka
Bartek Pucek
AIP Seed
Walden Yan
Fernando Rojo
Fryderyk Wiatrowski
Mike Grabowski

No lead investor was disclosed for the round.

Why It Matters

QA testing remains one of the more labor-intensive parts of shipping software. Teams typically maintain suites of automated tests that require ongoing upkeep, and those suites often fail to catch issues that only appear in real production environments. TesterArmy's pitch — an agent that monitors production and pull requests, executes real sessions, and reports back with visual evidence — targets both the maintenance burden and the coverage gap.

The presence of Y Combinator and a long list of angel and fund investors suggests early confidence in the team and the product direction. For a pre-seed company, 20+ production customers provides a meaningful base of validation.

What's Next

TesterArmy has not disclosed specific plans for the €1 million in new capital. The company continues to operate in the San Francisco Bay Area and is backed by Y Combinator's Spring 2026 batch.