Lark

Founded by Jack Brown & Vijit Dhingra in 2025

Create self-healing end-to-end tests for user interfaces and backend APIs automatically

Pricing model

Demo

Rating

★ Mixed Reviews

Time to value

Quick Setup (< 1 hour)

You can use Lark to create and run automated end-to-end tests across all product surfaces using plain English. It checks web dashboards, backend APIs, SDKs, and asynchronous workflows continuously without breaking when your interface changes. When a test discovers an issue, it provides reproducible test scripts, execution logs, screenshots, and video recordings to speed up debugging. You can plug Lark into GitHub Actions or GitLab CI to block failing pull requests, and send alerts directly through Slack, email, or PagerDuty.

What Lark does

Write end-to-end tests using plain English promptsRun automated tests across UI dashboards and API endpointsInspect test failure recordings, logs, and screenshotsConfigure CI/CD pipelines to block failing pull requestsSend production incident alerts to Slack and PagerDutyDownload reproducible test execution scripts for local debuggingSelf-healing tests that automatically adapt to UI and API modificationsNatural language test creation without writing complex codeFull surface coverage testing web interfaces, backend APIs, and SDKsAutomated pull request gating to block broken builds from mergingDownloadable debugging artifacts including scripts, execution logs, and video recordingsInstant alert delivery to Slack, PagerDuty, and email upon test failuresDirect support for coding assistants like Cursor and Claude Code