PRODUCT / FUZZING

Find the bugs your tests miss.

Every night, Cofactor uses your app the way real people do and reports anything that breaks.

app.runcofactor.com/explore/storefront
Explore›Storefront

Explore · Storefront

Daily exploration cycles for this application.
Map2 issues found today
?
Passing
Not passing
Uncovered
Never explored
?Lead
●Worker
9/17/2026, 6:00:30 AM3 workers · took 9m 42s · 2 issues foundExplored
  • Billing & Plans: exercised upgrade, downgrade and seat changes as Owner and Admin. Proration preview matched the invoice on all three paths. Downgrade below the current seat count was blocked with a clear error, as expected.
  • Checkout: exercised card, wallet and saved-payment paths as a returning customer. Applying an expired promo code left the order total unchanged but kept the success banner shown, so the cart and the total disagree — filed as CF-3391.
ISSUESCF-3391Expired promo leaves total unchangedCF-3392

Explore · Storefront

Daily exploration cycles for this application.
2 issues found today
Passing
Not passing
Uncovered
Never explored
ISSUESCF-3391CF-3392

How it works.

Several agents use your app at the same time, each signed in as a different kind of user. When something breaks, Cofactor checks it again before it files an issue.

Different kinds of users

Each agent signs in with its own account, so it sees what that user would see.

New pages get explored

When an agent finds a page it hasn’t seen before, it comes back to it on the next run.

Only real bugs get filed

A failure is run again before it’s reported, so one bad run won’t create an issue.

It gets better each night

Cofactor remembers what it has already covered and spends more time on the parts it hasn’t.

What it catches.

01

Half-finished work

Real users abandon checkouts, use discount codes after they expire, and change plans partway through the month.

02

Unusual clicking

Users hit the back button, submit forms twice, and open the same record in two tabs. Cofactor tries this too and checks that nothing breaks.

03

Unexpected input

Names with apostrophes, text pasted from Word, and very large exports. Cofactor tries inputs like these on the forms it finds.

Common questions.

Does it run against production?

No. We set up and manage separate environments for you, so fuzzing never touches your production data. You choose when it runs.

Will it create junk data?

Yes, but it doesn’t matter. We manage the environments for you and they’re all disposable, so the data is thrown away after each run. You choose which parts of your app are in scope.

How is this different from a fuzzer?

A traditional fuzzer sends random input to a single function. Cofactor uses your whole product as a signed-in user trying to get things done, and checks whether the results make sense.

Find the bug before your customer does.

Join the waitlist, or book a call and we will map your surfaces.

Book a call