Overview
Diffblue develops AI-driven unit testing for enterprise software engineering.
What Diffblue does
Diffblue automates regression unit-test generation for enterprise codebases. Its Testing Agent coordinates coverage analysis, build fixes, test planning, generation and verification so a team can increase coverage across a project rather than prompt for one test at a time.
The current agent works with enterprise-approved coding platforms including Claude Code and GitHub Copilot CLI. It processes classes in parallel, verifies that generated tests compile and pass, cleans up unsuccessful work and prepares changes for review. Java and Python are supported in its published offer.
Pricing is tied to net new lines of coverage added above the measured baseline. The starting package covers 5,000 additional lines, while larger deployments can use volume arrangements and on-premises options. This makes the delivered regression coverage the commercial unit instead of developer seats.
Pricing
Charges are based on verified coverage added above the measured baseline.
- Starting package
- $1,500
- 5,000 net new lines of verified coverage, equivalent to $0.30 per added line.
- Enterprise
- Custom
- Volume packages, multi-repository support and deployment options.
Company details
- Funding
- £6.7 million round (2022)
Founders & leadership
Investors & backers
Diffblue’s company history lists a £6.7M financing led by Albion Capital in 2022 and Citi’s addition as a strategic investor in 2023.
- Oxford Science Enterprises
- Albion Capital
- Citi
