Meticulous builds an AI-powered testing platform that automatically generates and maintains end-to-end visual tests for web application frontends — with zero test writing by developers. The platform works by embedding a lightweight script that records real user sessions across dev, staging, and production environments. When a pull request is submitted, Meticulous replays relevant recorded sessions against the updated code, captures pixel-level screenshots, and posts visual diffs directly in the PR for quick review — all within roughly two minutes. Backend calls are mocked to eliminate false positives from changing data. Crucially, its core engine is a deterministic, Chromium-based simulation system — not LLMs — meaning results are repeatable and trustworthy. The company is positioning itself as the "verification layer" that makes AI-generated code safe to ship: as coding agents accelerate code output, Meticulous intercepts before deployment. It sells to engineering teams at growth-stage and enterprise software companies. Named customers include Notion, Dropbox, Wiz, ElevenLabs, Mercor, LaunchDarkly, Lattice, and Traba.