What Lark does
Lark is a continuous, end-to-end testing platform for AI-driven software development. It automatically tests web and mobile applications across multiple surfaces, UI, API, CLI, and mobile, running on an ongoing schedule rather than only at release time. The company is backed by Y Combinator and was founded by former Stripe engineers.
Key capabilities
Tests are written in natural language rather than code, and Lark's self-healing tests adapt when product interfaces change instead of breaking. It covers frontend, backend, and asynchronous workflows, and produces debugging artifacts including reproducible scripts, logs, screenshots, and videos. Lark integrates with CI/CD tools such as GitHub Actions and GitLab CI, alerts through Slack, email, or PagerDuty, and connects with AI coding tools like Claude Code, Cursor, and Codex.
Who it's for
Lark is aimed at engineering teams shipping web and mobile products, especially those generating code quickly with AI and needing test coverage that keeps pace without constant rewrites.