All testing tools
193 tools across 17 categories. Filter by what you actually need — your language, your budget shape, whether it has to run on your own infrastructure.
71 tools
Amplitude
Session Replay
Behavioural product analytics with strong cohort and retention analysis.
Appium
Mobile Testing
The cross-platform standard for native, hybrid and mobile-web automation.
axe-core
Accessibility
The open-source accessibility rules engine almost every other tool is built on.
BrowserStack
Device Cloud
The largest browser and real-device cloud, with 3,500+ device/browser combinations.
Cypress
E2E & UI Testing
Developer-first browser testing with an interactive runner developers actually enjoy.
Dependabot
Security Testing
Free dependency updates and vulnerability alerts, built into GitHub.
ESLint
Code Quality
The JavaScript and TypeScript linter every project ends up using.
Faker
Test Data & Mocks
Generate realistic names, addresses, dates and text for fixtures, in any language.
Grafana k6
Load & Performance
Developer-first load testing: JavaScript scripts, Go engine, CI-native thresholds.
Jest
Unit & Component
The JavaScript testing incumbent: batteries included, snapshots, huge ecosystem.
LaunchDarkly
A/B & Flags
The enterprise feature-flag platform, with experimentation layered on top.
LocalStack
Test Data & Mocks
A local AWS cloud emulator so you can test infrastructure without an AWS bill.
Mixpanel
Session Replay
Event analytics with fast, self-serve reporting non-analysts can actually use.
Mock Service Worker
Test Data & Mocks
Intercept requests at the network layer so your app code never knows it is mocked.
Playwright
E2E & UI Testing
Microsoft's cross-browser automation library with tracing and auto-waiting built in.
Renovate
Security Testing
Highly configurable automated dependency updates, free and self-hostable.
Selenium WebDriver
E2E & UI Testing
The W3C standard for browser automation. Every language, every browser, twenty years of it.
Sentry
Monitoring
Error tracking with stack traces, release attribution and now session replay.
Snyk
Security Testing
Developer-first security across dependencies, code, containers and infrastructure.
SonarQube
Code Quality
The static-analysis standard: 30+ languages, quality gates, clean-as-you-code.
Storybook
Unit & Component
Build components in isolation, then test the stories you already wrote.
Testcontainers
Test Data & Mocks
Real databases and services in throwaway Docker containers, per test run.
Testing Library
Unit & Component
Query the DOM the way a user would, not the way the framework does.
Vitest
Unit & Component
Vite-native test runner with instant watch mode and a Jest-compatible API.
WireMock
Test Data & Mocks
The standard HTTP mock server for JVM and beyond: record, replay, stub, simulate faults.
Applitools Eyes
Visual Testing
Visual AI that compares screenshots the way a person would, not pixel by pixel.
Artillery
Load & Performance
YAML or JavaScript load tests that run serverless on AWS at large scale.
Biome
Code Quality
Rust-based linter and formatter that replaces ESLint and Prettier, very fast.
Checkly
Monitoring
Monitoring as code: your Playwright scripts, running against production on a schedule.
Checkmarx One
Security Testing
Enterprise application security platform: SAST, SCA, DAST, IaC and API security.
Chromatic
Visual Testing
Visual testing and review built by the Storybook team, for Storybook.
CodeQL
Security Testing
Query your codebase like a database to find vulnerability patterns across the whole repo.
Cucumber
E2E & UI Testing
Behaviour-driven development with Gherkin scenarios shared by business and engineering.
Detox
Mobile Testing
Grey-box E2E testing built specifically for React Native.
Gatling
Load & Performance
High-performance load testing with a code-first DSL and superb HTML reports.
GrowthBook
A/B & Flags
Open-source feature flags and experimentation that runs on your data warehouse.
LogRocket
Session Replay
Session replay built for engineers: console, network, Redux state and stack traces.
Mend.io
Security Testing
Software composition analysis with automated remediation and licence compliance.
Mocha
Unit & Component
Minimal, unopinionated Node.js test runner you assemble to taste.
Pact
API Testing
Consumer-driven contract testing so services can deploy independently.
Percy
Visual Testing
Visual review as a pull-request check, integrated with your existing E2E suite.
PostHog
Session Replay
Open-source product analytics, replay, flags and experiments in one self-hostable platform.
Puppeteer
E2E & UI Testing
Chrome automation library from the Chrome team. Great for scraping, thin for testing.
Sauce Labs
Device Cloud
Enterprise-grade device cloud with deep analytics and strong security posture.
Semgrep
Security Testing
Pattern-based static analysis where rules look like the code they match.
Statsig
A/B & Flags
Feature flags, experimentation and product analytics in one warehouse-friendly platform.
SuperTest
API Testing
In-process HTTP assertions for Node.js apps, without binding a port.
TestMu AI
Device Cloud
Cost-competitive device cloud with an AI-assisted test-orchestration layer.
Unleash
A/B & Flags
Open-source feature management with a privacy-first, self-hosted architecture.
WebdriverIO
E2E & UI Testing
A batteries-included JavaScript framework over WebDriver and Chrome DevTools.
AVA
Unit & Component
Concurrent Node.js test runner that isolates every file in its own process.
Codacy
Code Quality
Automated code review with security scanning and coverage in the pull request.
ConfigCat
A/B & Flags
Simple, cheap feature flags with unlimited team members on every plan.
DeepSource
Code Quality
Static analysis with autofix, tuned hard for low false-positive rates.
Eppo
A/B & Flags
Warehouse-native experimentation with a serious statistics engine.
Flagsmith
A/B & Flags
Open-source feature flags and remote config with straightforward self-hosting.
Jasmine
Unit & Component
Behaviour-driven JavaScript testing framework with no external dependencies.
Nightwatch.js
E2E & UI Testing
Integrated W3C WebDriver framework with a readable, chainable API.
node:test
Unit & Component
Node.js's built-in test runner. Zero dependencies, already installed.
OpenReplay
Session Replay
Open-source, self-hosted session replay — your user data never leaves your infrastructure.
Qlty (formerly Code Climate Quality)
Code Quality
Maintainability and technical-debt tracking, spun out of Code Climate as Qlty.
Qodana
Code Quality
JetBrains' IDE inspections, running as a CI quality gate.
Split
A/B & Flags
Feature delivery with automatic impact measurement on every flag.
TestCafe
E2E & UI Testing
Node.js E2E testing with no WebDriver, no plugins and no browser binaries to manage.
Argos
Visual Testing
Open-source visual testing with a GitHub-native review experience.
IBM Equal Access Toolkit
Accessibility
Free accessibility checker and rules engine from IBM, with a strong developer extension.
Lost Pixel
Visual Testing
Being sunset: open-source visual regression whose team has joined Figma.
Neosync
Test Data & Mocks
Archived: open-source data anonymisation, no longer maintained after the Grow Therapy acquisition.
QA Wolf
E2E & UI Testing
Outsourced E2E coverage: they write and maintain your Playwright suite.
Snaplet Seed
Test Data & Mocks
Generate a coherent, schema-aware seed database for local development and tests.
TestDriver
E2E & UI Testing
Vision-model E2E testing that drives a real desktop instead of querying the DOM.