Compatibility Testing

Stop losing users to a layout that only breaks on their device

We test your web or mobile application across the browsers, operating systems, devices, screen sizes, and network conditions your real users are on — using real-device clouds like BrowserStack, Sauce Labs, and LambdaTest, not a handful of emulators.

Book a 20-minute compatibility scoping call Book a 20-min call

Why ThoughtCoders

US, Canada & UK overlapWorking hours planned around your team, not just ours.
One point of contactA named lead owns the engagement end to end — no ticket queue.
NDA on every engagementSigned before we see a single ticket or line of test data.
Scale up or down monthlyNo multi-year lock-in — resize the team as the release calendar changes.

Who this is for

Product teams shipping a web or mobile app to a broad, uncontrolled device and browser base, where a rendering bug on one combination quietly costs conversions.

Especially useful if support tickets are the way you currently find out "it doesn't work on my phone."

What you get

A compatibility matrix built from your actual analytics data, prioritising the browser/OS/device combinations your users are really on
20-30 test cases covering your critical user journeys across the top-priority combinations in that matrix
Real-device execution across BrowserStack, Sauce Labs, or LambdaTest (your preference or ours)
Visual regression checks on key pages using automated screenshot comparison
A WCAG 2.1 AA accessibility pass covering keyboard navigation, color contrast, and screen reader compatibility
A defect report classified by severity, affected combination, and screenshot/video evidence
A 45-minute walkthrough of results and how to extend the matrix for future releases

Timeline & process

Week 1

Matrix definition & environment setup

We review your analytics and product requirements to define the browser, OS, device, and resolution matrix, then set up real-device cloud access.

Week 2

Test case design

Test cases are written against your critical user journeys and mapped to each dimension of the compatibility matrix.

Week 3

Execution across the matrix

Automated and manual execution runs across the prioritised combinations, including visual regression and accessibility checks.

Week 4

Reporting & walkthrough

Defects are classified by severity and combination, and we walk your team through the report and remediation priorities.

What we need from you

Access to a staging or production-like environment for the application under test
Analytics data (or a reasonable approximation) showing your real browser/device/OS distribution
A list of the 3-5 critical user journeys you most need validated
One walkthrough call with your team before we start

Proof, not promises

Not in scope, so there are no surprises

Exhaustive testing of every possible device/browser combination — we cover the matrix that matches your real traffic, not a hypothetical universe
Native app store certification testing (Apple/Google review readiness) unless scoped separately
Performance/load testing beyond what is needed to observe a page under a throttled network condition
Ongoing regression testing after the engagement — available separately as a retainer
Fixing the compatibility issues we find — that stays with your development team

See which device and browser combinations are costing you conversions

Twenty minutes, no slide deck. Send us your analytics breakdown and we will tell you where your current coverage gaps likely are.

Book a 20-minute compatibility scoping call