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Your recommended stack

3 areas to cover, based on what you told us

“We don't know if it works on other browsers or devices”
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1. Cross-Browser & Device Cloud

Because you said: “We don't know if it works on other browsers or devices”

Buyer’s guide
BrowserStackBest fitfrom $29Paid

The largest browser and real-device cloud, with 3,500+ device/browser combinations.

Why this fits you

  • The broadest device and browser matrix available, including older versions and new devices quickly.
  • Works with essentially every automation framework, so migration is low-risk.

Main limitation

  • Parallel-session pricing gets expensive fast, and idle capacity is still billed.
  • Remote sessions are slower than local execution, lengthening feedback loops.
Sauce Labsfrom $39Paid

Enterprise-grade device cloud with deep analytics and strong security posture.

Why this fits you

  • Strong enterprise security and compliance story, including private device pools.
  • Test analytics genuinely help identify systemic flakiness rather than individual failures.

Main limitation

  • Generally the most expensive of the major device clouds.
  • Device matrix is slightly narrower than BrowserStack's.
TestMu AIfrom $15Free tier

Cost-competitive device cloud with an AI-assisted test-orchestration layer.

Why this fits you

  • Best price-to-capability ratio among the major device clouds.
  • HyperExecute meaningfully reduces wall-clock time on large suites.

Main limitation

  • Support quality is reported as more variable than the incumbents.
  • Newest devices sometimes arrive later than on BrowserStack.
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2. Mobile App Testing

Because you said: “We don't know if it works on other browsers or devices”

Buyer’s guide
AppiumBest fitOpen source

The cross-platform standard for native, hybrid and mobile-web automation.

Why this fits you

  • One API and one test suite for both platforms, in the language you already use.
  • Every device cloud supports it, so you stay portable.

Main limitation

  • Notoriously slow and flaky compared to the native frameworks it wraps.
  • Setup is a genuine project: drivers, Xcode, provisioning, Android SDK, versions.
EspressoOpen source

Google's native Android UI testing framework. Fast, stable, Android-only.

Why this fits you

  • Automatic UI-thread synchronisation makes tests both fast and reliable.
  • First-party Google support, updated alongside Android itself.

Main limitation

  • Android only.
  • Testing across app boundaries requires UiAutomator alongside it.
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3. Visual Regression Testing

Because you said: “We don't know if it works on other browsers or devices”

Buyer’s guide
PercyBest fitFree tier

Visual review as a pull-request check, integrated with your existing E2E suite.

Why this fits you

  • Plugs into an existing suite with a few lines rather than requiring new tests.
  • Server-side rendering removes machine-to-machine screenshot inconsistency.

Main limitation

  • Screenshot-based billing escalates faster than teams expect.
  • Dynamic content requires careful masking or you drown in false diffs.
Chromaticfrom $179Free tier

Visual testing and review built by the Storybook team, for Storybook.

Why this fits you

  • Zero-effort setup if you already have Storybook
  • The hosted review UI is genuinely usable by designers and product managers.

Main limitation

  • Strongly tied to Storybook; without it much of the value disappears.
  • Component-level, not full-page — it will not catch a broken page layout.
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