Tusk (YC W24) is an AI agent that helps engineering teams prevent regressions and increase test coverage automatically. Living inside CI, Tusk generates unit and integration tests with codebase context every time a developer raises a pull request, surfacing edge cases and bugs before they reach production. By automating test creation that engineers often skip, Tusk lets teams ship faster while maintaining quality. Founded in 2023 by Marcel Tan and Sohil Kshirsagar, Tusk raised a seed round with backing from Y Combinator, Bain Capital Ventures and TitletownTech.