Tusk
: How to use it, features, and the business problems it solves

How to Use

1. Connect with GitHub

   Create an account from the official site (usetusk.ai), install Tusk into GitHub, and connect the target repositories. No credit card is required, and you can start with a 14-day trial of the Team plan.

2. Configure target repositories

   Choose the repositories where you want to auto-generate tests, and set your testing approach (unit tests, API tests, etc.) and coverage goals.

3. Create a pull request

   When you create a PR as usual, Tusk analyzes the code changes and automatically generates the missing test cases.

4. Review the results on the PR

   Tusk presents the generated tests and their execution results as comments on the PR. Engineers review the content and choose which tests to incorporate.

5. Test continuously in CI

   The incorporated tests can be run locally or in CI. Automatic test maintenance (self-healing) happens on every commit, continuously detecting regressions.

Features

• Automatic test generation from PRs

  Analyzes code changes in pull requests and automatically generates missing unit tests and integration (API) tests.

• Understanding of codebase context

  Combines rule-based methods and an LLM to quickly grasp the relevant codebase context before generating tests.

• Self-healing (automatic maintenance)

  Automatically maintains the existing test suite on every commit, reducing the effort of maintaining broken tests.

• Coverage backfill (CoverBot)

  Bulk-fills in the missing unit tests needed to reach your coverage goals.

• CI and GitHub integration

  Integrates with GitHub and comments the generated tests and results on the PR. Supports test execution in CI.

• Observability and monitoring

  Provides a dashboard to visualize the status and impact of generated tests, plus integrations with Linear and Jira.

• Optimization for coding agents

  Also supports use cases where AI coding agents test and verify their own changes, and can be set up with a single CLI.

Pricing

Pricing is current as of June 2026. Because prices are in US dollars, amounts in Japanese yen vary with exchange rates. Billing is per active developer. Check the official pricing page for the latest information.

※ The Team plan is billed per active developer. Enterprise has a minimum seat requirement.

Pros & Cons

Pros

• AI takes over writing test code, which often gets put off, making it easier to raise coverage
• Regressions can be detected at the PR review stage, leading to early detection of defects
• Because it generates tests informed by codebase context, the tests are less likely to be superficial
• There is a free trial you can try without a credit card

Cons

• The interface (UI) and documentation are primarily in English, and official Japanese support cannot be confirmed
• The Enterprise plan has a minimum seat requirement and may not suit small teams
• Generated tests assume review, so you cannot simply adopt all of them as-is

Reviews & Reputation

• Some praise its efficiency for test automation, noting that the burden of writing test code has decreased and that because tests are proposed for each PR, it is easy to raise coverage.
• Others value how it differs from formulaic test-generation tools, noting that it produces realistic tests informed by codebase context.
• On the other hand, some point out that it is primarily in English and that generated tests need scrutiny, so it is realistic to operate it on the premise of a review process.

FAQ

Q. Can I use Tusk for free?

There is a Free plan with no credit card required (including a 14-day trial of the Team plan). For full-scale use, you need the Team plan at $50 per developer per month.

Q. Which repository management services does it support?

It integrates with GitHub to analyze PRs and comment the generated tests on the PR. It also supports test execution in CI.

Q. What kinds of tests can it generate?

It can generate unit tests and integration (API) tests. It also supports coverage backfill via CoverBot.

Q. Does it support Japanese?

The interface and documentation are primarily in English, and official Japanese support cannot be confirmed as of June 2026. The generated test code depends on the language of the target code.

How Tusk differs from other coding-assistance AI

For a more detailed comparison, please also see the pages of related services.