Automated regression unit test generation at scale
The Problem
AI coding agents can’t deliver comprehensive coverage
You need 80%+ coverage. Claude and Copilot demand constant developer babysitting and still won’t get you close.
Low coverage despite endless prompting
Our benchmark research shows that hours of work and continuous prompting still results in low test coverage.
Constant context switching = AI toil
Checking in on your unpredictable agent every few minutes is the new developer productivity destroyer. Context switching kills.
Verification is the new bottleneck
Making sure AI-generated code doesn’t break requires high regression unit test coverage. Guaranteeing the tests are right requires Diffblue.
AI coding agents weren’t built for automatically generating tests at project-level scale. The Diffblue Testing Agent was.
fixesVerifiesShipsHOW WE'RE DIFFERENT
They generate. We guarantee.
- 01
From AI code to production code
AI coding agents produce code quickly, including tests. But "produced" isn't "production-ready." Without verification, orchestration, and rollback, AI-generated tests create more work, not less. - 02
From AI output to production-ready tests
Diffblue Agents uses your existing, enterprise-approved AI coding platform as the engine — then wraps it in a decade of test engineering expertise: scoping, sequencing, verification, and quality guarantees that turn raw AI output into tests you'd actually merge.
Works with your enterprise-approved AI stack.- No new LLM vendor to evaluate.
BENCHMARK RESULTS
Don't take our word for it. See the data.
Diffblue Testing Agent vs. Sr.Developer + Claude Code — Internal benchmark across 8 enterprise-grade Java repositories totalling 31,069 coverable lines. All repositories started from 0% test coverage.
HOW IT WORKS
Point it at the repo. Walk away.
Diffblue Agents CLI processes your entire codebase autonomously — including legacy Java 8 and 11 codebases that generic AI tools struggle with.
Platform compatibility
Works with your enterprise-approved AI stack
Diffblue Agents for GitHub Copilot
Enterprise test generation that makes your Copilot investment pay off
Diffblue Agents for Claude Code
Autonomous test generation with the reliability Claude alone can't deliver
Java 8, 11, 17, 21, 25
Python
Gemini CLI— Coming soon
Codex— Coming soon
Pricing
Outcome-based pricing that scales with your value
Every line you’re charged for represents a unit test that compiles, passes, and improves your coverage. You’re only charged for tests that actually work.
Charged per verified line of coverage added
Tests designed to achieve high mutation testing scores
Scales naturally — more repos = more coverage = more value
Every Diffblue-generated test is verified to compile and pass before delivery
No maintenance renewal problem — pay once for coverage delivered
ENTERPRISE TRUST
Built for organizations that can't afford to get testing wrong
Banks need months of security review. Defense contractors require air-gapped solutions. Diffblue has been earning that trust for a decade.
Lines tested in production
Years of dev time saved
Production outages saved
In production since
Banks need months of security review. Defense contractors require air-gapped solutions. Healthcare companies need audit trails. Diffblue has been earning that trust for a decade.
Oxford University spin-out — formal methods heritage
Fortune 500 customers in financial services, insurance, technology
Diffblue CLI runs locally — your code stays in your environment
On-premises solutions available for regulated environments
Need a fully on-prem, no-LLM solution?
Diffblue Cover provides deterministic, offline Java unit test generation for environments that require air-gapped deployment with zero external dependencies.
Autonomous unit test generation for enterprise codebases
Run the Diffblue Testing Agent on your codebase. See the coverage
results. Deploy with the AI coding platform you already use.
