Zerocheck vs Checksum

Checksum generates E2E tests from user sessions. Zerocheck generates tests from code changes, catching regressions before they reach users.

See it run on your app

What Checksum does well

•Generates tests from real user session recordings - tests reflect actual usage patterns, not guesses about user behavior
•No test authoring needed - point it at your production traffic and it creates tests from observed flows
•Catches real user flow patterns that manual test authoring often misses
•Good for discovering untested paths and edge cases based on how users actually navigate your app

Where Checksum falls short

—Reactive by design - tests come from past user sessions, not proactively from code changes. Regressions reach users before tests exist for them
—Requires production traffic to generate tests - pre-launch or low-traffic apps get no coverage
—No compliance evidence generation - no SOC 2 artifacts, no control tagging, no audit-ready exports
—Limited CI integration documentation - unclear how tests fit into a PR-gated workflow
—Early stage product - feature set and long-term roadmap are still evolving

How Zerocheck differs

Proactive, not reactive - Zerocheck generates tests from PR diffs before merge, catching regressions before users ever see them
Works from day one - no production traffic required. Paste a URL and get tests immediately
SOC 2 compliance evidence generated from every test run - audit artifacts are automatic
PR-native results with pass/fail comments, step traces, and evidence directly in your pull request
Confidence scoring with transparent reasoning - you see exactly why each test result is reliable

Side-by-side

Feature

Checksum

Zerocheck

Test source

User session recordings

PR diffs and code changes

When tests run

After users encounter flows

Before merge - on every PR

Works without traffic

No - needs production sessions

Yes - works from day one

Compliance evidence

Not available

Automatic SOC 2 artifacts

PR integration

Limited

Built-in PR comments + evidence

Approach

Reactive - learns from past

Proactive - tests before merge

Also compare

vs Playwright vs Selenium vs Cypress vs BrowserStack vs LambdaTest vs Katalon vs Sauce Labs vs TestRail vs testRigor vs QA Wolf vs Mabl vs Momentic vs Octomind vs Rainforest QA

FAQ

How is Checksum different from Zerocheck?

Checksum generates tests from real user session recordings, so tests reflect actual usage patterns. Zerocheck generates tests from PR diffs, catching regressions before they reach users. Checksum is reactive (tests come after users encounter flows), while Zerocheck is proactive (tests run before merge).

Does Checksum work for pre-launch apps?

No. Checksum requires production traffic to generate tests. If your app is pre-launch or has low traffic, you get no coverage. Zerocheck works from day one: paste a URL and get tests immediately, regardless of traffic volume.

Can Checksum catch regressions before users see them?

Not by design. Checksum creates tests from past user sessions, so regressions reach users before tests exist for the affected flows. Zerocheck generates tests from PR diffs before merge, catching regressions proactively before they ever reach production.

Does Checksum generate SOC 2 evidence?

No. Checksum has no compliance evidence features, no control tagging, and no audit-ready exports. Zerocheck generates SOC 2 audit artifacts from every test run automatically, which is important for teams going through compliance processes.