We help teams ship software that works.

We're Cofactor. We're engineers who spent years building and breaking production systems at companies large and small, and we got tired of watching good software fail in ways a test should have caught. We work fully distributed, across time zones, with roots in San Francisco and teammates wherever the best people happen to live.

AI changed how software gets written. Code is faster and cheaper to produce than ever, so the hard part now is knowing whether it works. Teams used to skip testing when they were in a hurry. With AI writing so much of the code, testing is what decides whether moving fast ends in working software or in bugs your customers find.

We think testing should keep up with how fast you ship. You shouldn't have to slow down or add more process to feel confident. Testing should run automatically, report honestly, and be fast enough that nobody wants to skip it. That's what we're building, so your team can move fast knowing the important things are checked.