Tusk (YC W24) is an AI-powered testing platform founded in 2023 by Marcel Tan and Sohail Kshirsagar. It operates as a non-blocking CI check that automatically generates unit and integration tests whenever a developer opens a pull request, using full codebase context and existing business logic to produce relevant happy-path and edge-case tests. Engineers can accept, decline, or customize the generated test suites before merging. The product has two main modes. Tusk Tester runs per-PR: it analyzes the diff, generates tests in an ephemeral sandbox, verifies they pass, and surfaces suggestions alongside the PR. Tusk Drift (moving toward public beta as of late 2025) focuses on ongoing test-suite maintenance, automatically updating existing tests on each commit so they continue to reflect the latest business logic rather than drifting out of sync. Tusk is built for software engineering teams that want to increase test coverage without dedicated QA bandwidth. Customers such as DeepLearning.AI, Wyndly, and Afterword use it; one customer grew from 2,500 to over 7,000 tests within a month. The company reported approximately $440K-$600K in annual revenue with a four-person team as of 2025. Integrations include GitHub, Linear, Jira, and standard CI pipelines. Configuration options let teams specify mocking strategies, factory usage, directory exclusions, and other testing conventions so generated tests conform to existing standards. Tusk reported that 69% of its generated test suites are incorporated into customer PRs, indicating high acceptance rates relative to competing tools. Key features: - Per-PR automated unit and integration test generation with codebase context - Ephemeral sandbox execution to verify generated tests pass before surfacing them - Tusk Drift: continuous test-suite maintenance that updates tests on every commit - Non-blocking CI check with accept/decline workflow for engineers - Coverage-guided agentic workflow (introduced October 2025) for large repos - Integrations with GitHub, Linear, Jira, and standard CI pipelines - Customizable configs for mocking strategies, factories, and directory exclusions - CoverBot feature to backfill unit tests for existing codebases
Free tier (individual, limited repos); Team plan (unlimited unit + API test generation, 3 synced repos, CoverBot, Linear/Jira integration, priority Slack support) - price not publicly listed; Enterprise plan (self-hosting, SAML/SSO, Analytics API, custom workflows) - contact sales