v1.0 — Delta-Driven Testing

Don't run all tests.
Run the right ones.

Delta maps your code coverage in the cloud to intelligently select and run only the tests affected by your changes. 10x faster test runs, 0x configuration headache.

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bash — delta
$ delta run
Delta: Analyzing 3 changed files...
Cloud: Mapping intersection complete (12ms)
Running 4/452 affected tests...
All affected tests passed.

Built for High-Velocity Teams

Stop waiting for CI. Start shipping with confidence.

Intelligent Selection

Focus strictly on your deltas. Analyze git changes to select and run only the exact subset of affected tests, avoiding redundant runs.

Cloud Mapping

Sync test coverage across your team. Mappings are shared and computed in the cloud, aligning developer environments instantly.

Instant Feedback

Cut developer wait times from minutes to seconds with instant test execution.

AI Token Savings

Prevent AI agents from guessing the test scope. Delta serves the exact affected tests, saving millions of context tokens in AI-driven workflows.

Simple, Predictable Pricing

Choose the plan that fits your engineering velocity. No hidden fees.

Monthly
Annual Save 17%

Community Free

Perfect for solo developers and open-source projects.

$0/mo
Free Forever
  • 500 mapped tests
  • 1 repository
  • 1 team member
  • 200 queries / mo
  • 50 pushes / mo
  • Priority Cloud Runner
  • Dedicated Support
Get Started Free
Most Popular

Developer Pro

For fast-moving startups and professional developers.

$29/mo
Billed monthly
  • 10,000 mapped tests
  • 5 repositories
  • 3 team members
  • 5,000 queries / mo
  • 500 pushes / mo
  • Priority Cloud Runner
  • Dedicated Support
Start Pro Trial

Engineering Team

For growing engineering teams scaling their CI/CD pipelines.

$79/mo
Billed monthly
  • 100,000 mapped tests
  • 25 repositories
  • 15 team members
  • 50,000 queries / mo
  • 5,000 pushes / mo
  • Priority Cloud Runner
  • Dedicated Support
Start Team Trial

Enterprise

Custom limits, dedicated infrastructure, and enterprise SLAs.

Custom
Annual billing
  • Unlimited mapped tests
  • Unlimited repositories
  • Unlimited team members
  • Unlimited queries & pushes
  • Dedicated Cloud Runner
  • 24/7 Dedicated Support & SLA
  • Custom SAML / SSO
Contact Sales

Quick Start in 60 Seconds

  • 1
    Install CLI pip install deltatest-cli
  • 2
    Login & Track delta login
    delta track --name my-app
  • 3
    Build & Push Mapping delta build-mapping
    delta push
  • 4
    Run Affected Tests delta run

    Intelligently runs only the tests affected by your code changes.

# Example query result from API
{
  "affected_tests": [
    "test_auth.py::test_login",
    "test_auth.py::test_logout"
  ],
  "stats": {
    "query_ms": 12,
    "coverage_pct": 84.5
  }
}