Ship Fast.
Don’t Break Things.

Take testing off your plate. Fully managed UAT & regression testing with AI.

Talk to the team →See how it works
~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
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

FAQ

Don't see your question? Email hello@runcofactor.com — a real human responds within 24h.

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 / Take it for a run

Stop hoping
your coding agent got it right.

Join the private beta. We onboarded a limited number of teams per month. You'll be paired with a founder for setup.

Book time with us