Company Overview
About Stably AI
Stably AI is a San Francisco-based AI test automation platform — backed by Y Combinator — reaching $1 million in annual revenue in December 2024 with a 5-person team — providing engineering teams with an AI platform that auto-generates, runs, and maintains end-to-end tests in CI/CD pipelines with zero-flakiness guarantees and self-healing capabilities that automatically repair tests when UIs change, replacing the brittle Playwright and Cypress test suites that break with every UI update. Founded in 2023 by ex-Google Chrome infrastructure engineer Jinjing Liang (CEO) and ex-Uber Safety ML engineer Neil Parker (CTO), Stably enables customers like OpenArt (which scaled to $16M ARR with a 10-person engineering team using Stably) to achieve test coverage without dedicated QA engineers.
Business Model & Competitive Advantage
Stably AI's AI test generation and healing platform addresses the brittleness problem that makes end-to-end testing a developer pain point: a team that invests in Playwright or Cypress test suites discovers that the tests break whenever a UI component is renamed, a button's location moves, or a form's validation changes — requiring maintenance time that often exceeds the original test writing investment. The result: test suites rot as teams skip maintenance, depleting the regression safety net at precisely the point when the codebase is growing most rapidly. Stably's AI approach (generating tests from natural language descriptions of user flows, automatically detecting what changed when tests fail and repairing the selectors or assertions rather than just reporting failures) provides the self-healing capability that makes test suites durable — with 40+ engineering hours reclaimed weekly at Tofu AI representing the maintenance cost that Stably eliminates.
Competitive Landscape 2025–2026
In 2025, Stably AI competes in the AI test automation, end-to-end testing, and QA automation market with Playwright (Microsoft open-source testing, widely adopted), Mabl (intelligent test automation, $40M raised), and Testim (AI test automation, acquired by Tricentis) for engineering team AI-powered end-to-end test generation and maintenance platform adoption. Y Combinator backing connects Stably with the developer tools and engineering productivity investment community. The $1M ARR at 5 employees demonstrates strong capital efficiency. The 2025 strategy focuses on growing the high-growth startup segment (where small engineering teams need comprehensive test coverage without dedicated QA resources), building the visual AI testing for pixel-level UI regression detection, and expanding the CI/CD integration for GitHub Actions, CircleCI, and GitLab CI pipeline embedding.
Open Positions
Reddit Discussions
Key Differentiators
Market Leader
Stably AI is recognized as a market leader in the Infrastructure sector, demonstrating strong industry presence and customer trust.
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