About Diffblue
Diffblue Testing Agent generates, verifies and fixes unit tests across large codebases. It is built for projects that need broad regression coverage, and it runs on top of an existing AI coding tool.
What it does
The agent analyzes coverage, fixes build system problems, plans tests and generates them in parallel. It then verifies the output, cleans up the project and prepares a pull request. The company describes the agent as orchestrating the whole process until the job is done, rather than producing one test at a time. The product focuses on Java, which is the company's long-standing testing language.
Key features
- Generates regression unit tests across a project
- Analyzes coverage and plans which tests to write
- Verifies generated tests before they are kept
- Prepares pull requests with the new tests
- Runs on top of an existing AI coding platform
Who it's for
Enterprise teams with legacy Java code that need test coverage before changes are safe are the main audience. QA and engineering leads who want measurable coverage goals are another likely group.
Pricing and good to know
The site has a pricing page and a book demo option, so check there for current plans. The company also publishes benchmark results on its site. Generated tests should still be reviewed by your team, since tests that run are not always the right tests.
Highlights
- Generates regression unit tests across a project
- Analyzes coverage and plans which tests to write
- Verifies generated tests before they are kept
- Prepares pull requests with the new tests
