For E-commerce & Fintech

    Your revenue depends on flows that nobody tests end-to-end

    Checkout, 3DS, magic links, onboarding sequences. These are the highest-stakes flows in your app, and they're the hardest to test. Cypress can't do cross-origin. Playwright makes you fight for it. Zerocheck handles them natively.

    Book a demo

    Who this is for

    Role
    Head of Engineering, payments engineer, or product lead
    Company
    E-commerce or fintech processing online payments, PLG SaaS with magic link auth
    Trigger
    Stripe SDK update breaks 3DS. Magic link bug locks out 200 users. Customer emails 'I tried to buy your product three times.'

    This is for you if:

    • Checkout, payment, or onboarding flows that directly generate revenue
    • A broken user flow has cost measurable revenue in the last quarter
    • Currently rely on manual QA or crowdtesting before releases
    • Deploy more than twice per week
    • Engineering team under 50 people (no dedicated QA infrastructure)

    The pain is real

    “I deployed a new checkout flow on Friday afternoon at 4:47 PM. After 6 minutes Slack exploded. Payment processing broke and customers couldn't complete purchases.”

    DEV Communitysource

    “I tried to buy your product three times. Your site kept failing. I went to your competitor instead.”

    Optivem Journalsource

    Average payment incident costs $12K+ in failed transactions

    Stripe iframe testing is a universal pain point: Cypress can't handle cross-domain iframes

    95%+ of companies skip magic link testing in CI entirely

    Why nobody else solves this

    Checkout flows involve third-party iframes (Stripe Elements), cross-domain redirects (3DS), and test-mode sandboxes. Cypress can't do cross-origin. Playwright requires complex multi-context setup. Most teams mock Stripe or skip checkout E2E entirely.

    Email flows sit in a structural tooling gap. E2E tools can drive browsers but can't receive email. Email tools can receive email but can't drive browsers. Integration requires 2-4 hours of plumbing per project. Nobody does it.

    No testing tool claims 'checkout testing' or 'email flow testing' as a category. These are the highest-stakes flows, and they're universally the least tested.

    The workflow today vs. with Zerocheck

    Without Zerocheck

    Stripe ships a new Elements SDK version. Developer updates the package. Unit tests pass because Stripe is mocked. No E2E checkout test exists. Deployed Friday evening. Monday morning: 3% of payments failing. 3DS modal renders but the callback is broken. $12K in failed transactions before rollback.

    With Zerocheck

    Same SDK update. Zerocheck runs the checkout test: Stripe test card, real 3DS challenge, full purchase flow. Test detects changed 3DS behavior. PR blocked. Developer fixes before merge. Email flow test also verifies magic links still work after the deploy. Revenue protected.

    How it works

    1

    Configure Stripe test-mode card + 3DS challenge scenario

    2

    Built-in SMTP capture tests magic links and onboarding emails

    3

    Cross-origin iframes handled natively via visual interaction

    4

    Revenue math in the PR comment: what this test protects

    Other use cases

    SOC 2 Evidence

    Every release produces an immutable evidence pack - no more death by screenshot.

    Zero to CI

    Connect your repo, get 20 tests in CI within the hour. No framework, no selectors, no QA hire.

    Checkout Guardian

    Guard the only code path where a bug is measured in lost dollars per minute.

    FAQ

    Can Zerocheck test real Stripe checkout with 3DS?

    Yes. Stripe test-mode cards including 3DS challenge scenarios. Cross-origin iframes handled natively via visual interaction. The full purchase flow including 3DS modal is tested end-to-end on every PR.

    What about PCI compliance? Can we give a tool access to payment flows?

    Zerocheck uses Stripe test-mode cards, never real payment data. No PCI scope impact. Test mode is designed for exactly this purpose.

    How do you test magic links in CI?

    Built-in SMTP capture. Your test triggers a magic link email, Zerocheck intercepts it, extracts the link, clicks it, and verifies the session. No Mailtrap, no polling, no third-party dependencies.

    Our checkout has custom payment integrations beyond Stripe.

    Zerocheck tests via visual interaction, not API integration. If a human can complete your checkout flow in a browser, Zerocheck can test it. Stripe, PayPal, Klarna, custom payment forms.

    Your revenue depends on flows that nobody tests end-to-end

    Protect the flows that generate your revenue. Checkout, payments, onboarding, and email tested on every PR.

    Book a demo