--- source_url: "https://runcofactor.com/?utm_source=openai" title: "Cofactor: ship at AI speed without breaking everything" mirrored_at: 2026-08-11T03:38:07.390Z host: runcofactor.com cited_in_42a: true mirror_canonical: "https://index.42a.ai/runcofactor.com/index__q__utm_source_openai" --- > **Original source:** https://runcofactor.com/?utm_source=openai ## Ship Fast. Don’t Break Things. Take testing off your plate. Fully managed UAT & regression testing with AI. ~2 days to bootstrap a regression suite from code, tickets or natural language <3min PR test environment boot p50 90% flake reduction compared to Playwright Trusted by teams at ![Fintary](https://runcofactor.com/logos/fintary.svg)![Colvin Run](https://runcofactor.com/logos/colvinrun.png)![AirBills](https://runcofactor.com/logos/airbills.svg)![Dragonfly](https://runcofactor.com/logos/dragonfly.png)and many more §01 / Managed testing REGRESSION 01Stays current ## A regression suite that maintains itself. Cofactor turns your tickets and code into end-to-end tests, then keeps them working as your product changes. When you open a pull request, it runs the suite and updates the tests your changes touched, so the features you shipped before keep working. - ✓Written from your tickets and code, no setup - ✓Runs on each pull request and updates as the code changes - ✓Deterministic traces, not brittle selectors regression · 248 checkson each PR caught · checkout regressed 247 passed · 1 regressedsuite updated automatically §02 / Managed testing BUG HUNTING exploring · /checkoutUAT · autonomous startbug 18 paths walked1 bug found · not a flake 02Beyond your tests ## It finds the bugs your tests miss. Cofactor explores your product the way a real user would, clicking through flows and trying the edge cases. When it hits a real bug, it reproduces the steps a few times to rule out a flake before flagging it. - ✓Explores real user journeys on its own - ✓Reproduces issues before flagging them - ✓Reports each bug with a trace and the likely commit §03 / Managed testing ALERTS 03Where your team already works ## You hear about it in Slack. When Cofactor finds something, it tells you where you already work. Each finding shows up in Slack with what broke, the steps to reproduce it, and a link to the trace, so nothing sits waiting in a dashboard you never open. - ✓Findings posted to Slack as soon as they are confirmed - ✓What broke, how to reproduce, and a link to the trace - ✓No extra dashboard to check # qa-cofactor3 messages ◇ CofactorAPP2:14 AM 🐛 Regression in #checkout Tax total rounds up for EU carts. Reproduced 3 out of 3, not a flake. Likely from commit 3f9c2a1. View traceConsole logNetwork M Maya Chen8:03 AM thanks, I'll take a look this morning §03 / In the wild WHAT TEAMS SAY ## What teams are saying. QUOTE 01 “As an engineering leader, you're constantly weighing coverage against velocity. Cofactor is one of the few tools that's genuinely given us both. It's been a force multiplier for the team.” Tom Houman VP of Technology Colvin Run QUOTE 02 “Cofactor is the future of E2E testing with AI.” Matheus Icaro Senior Software Engineer Fintary QUOTE 03 “Cofactor has changed how we approach testing. We used to rely heavily on manual QA to ensure our product was ready for enterprise customers, but now we rely on Cofactor.” Dipesh Desai CEO AirBills Built for teams using → Claude CodeCodexCursorCopilot — or managing testing with → Azure Dev OpsJiraLinear& more §07 / FAQ COMMON QUESTIONS Playwright is a browser driver. Cofactor is a platform: AI generates the tests for you, every PR gets a full isolated test environment, a model decides what counts as a real failure, and tests are continuously curated into a regression suite. No. We have both a CLI and an MCP for agents, but we also have our own chat bot, a Chrome extension, and a polished web app for creating tests. Anyone on the team can contribute to the test suite in the way that matches their workflow. When a PR opens, we boot a hermetic copy of your environment — your services, your database (seeded from a sanitized fixture set), your background workers. The full E2E suite runs against this test environment in parallel. The test environment tears down on PR merge. We have extensive audit logs — videos, the actual steps the agent took, and what it was thinking when it took them. Over time we bake these tests into deterministic sequences that only change if your app changes. Tests are easy to read and review, so you can be confident you're testing the most important parts of your app. Cloud is the default. Dedicated single-tenant deployments are available on the Enterprise tier. §08 / Join the waitlist ## Stop hoping your coding agent got it right. We're onboarding two companies per week, and you'll be paired with a founder for setup. Join the waitlist and we'll reach out when your slot opens.