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Tusk (usetusk.ai)

AI-enabled testing platform that turns production traffic into API regression tests and automatically backfills unit test coverage. Catch regressions invisible to coding agents and humans alike.

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-25T20:57:25.732Z. Cached copy · Source on usetusk.ai

# Tusk (usetusk.ai)

> AI-enabled testing platform that turns production traffic into API regression tests and automatically backfills unit test coverage. Catch regressions invisible to coding agents and humans alike.

## Website

- [https://www.usetusk.ai/](https://www.usetusk.ai/): Main site and access point.

## About Us

Tusk is an all-in-one testing platform with three core products: **Tusk Drift** for API regression testing from live traffic, **CoverBot** for automated unit test backfill, and **Tusk Tester** for generating context-aware unit tests for PRs. Tusk helps engineering teams ship faster by catching regressions before they reach production, increasing code coverage without burdening developers, and closing the gap between what gets tested and what actually happens in production. Tusk is SOC 2 Type II compliant and backed by Y Combinator (W24).

## Products

### Tusk Drift — API Regression Testing from Live Traffic
- [https://www.usetusk.ai/tusk-drift](https://www.usetusk.ai/tusk-drift)
- Records real HTTP traffic, database queries, and cache calls from production or staging environments via a lightweight SDK (Node.js and Python).
- Replays recorded traces against PR changes in CI to detect unintended API response deviations (regressions).
- Covers thousands of realistic edge cases with minimal engineering overhead. Go from zero to a full API test suite within minutes.
- Replay testing is primarily **deterministic** — traces are recorded and replayed without requiring a live database or cache. AI is used only to automatically classify deviations as intended changes or unintended regressions.
- Built-in PII redaction and domain/endpoint filtering. SDK and CLI are open source.
- Supports running tests locally via Tusk CLI or in CI pipelines as a quality gate to block PRs that break production behavior.
- Setup requires running two commands. Install CLI in service root via `curl -fsSL https://cli.usetusk.ai/install.sh | sh` and run `tusk drift setup`.

### CoverBot — Automated Unit Test Backfill
- [https://www.usetusk.ai/coverbot](https://www.usetusk.ai/coverbot)
- Runs on a daily or weekly pipeline to proactively generate unit tests for untested parts of a codebase.
- Automatically opens PRs with high-quality tests that raise project coverage — no prompt engineering or manual iteration required.
- Self-iterates on generated tests if they encounter errors, ensuring executable output.
- Customers have seen 30% increases in project coverage on monoliths within one month.

### Tusk Tester - Unit Test Generation on PRs
- Automatically generates and runs unit tests on every pull request or merge request.
- Context-aware: ingests business context from Jira/Linear and code patterns from existing test suites.
- Self-healing: maintains existing test suites on every commit to reflect the latest business logic.
- 69% of Tusk-generated tests are incorporated into PRs.

## Use Cases

- [Regression Testing](https://www.usetusk.ai/regression-testing)
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