All testing tools

Behavioural product analytics with strong cohort and retention analysis.

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

The open-source accessibility rules engine almost every other tool is built on.

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

Developer-first browser testing with an interactive runner developers actually enjoy.

Free dependency updates and vulnerability alerts, built into GitHub.

The JavaScript and TypeScript linter every project ends up using.

Generate realistic names, addresses, dates and text for fixtures, in any language.

Developer-first load testing: JavaScript scripts, Go engine, CI-native thresholds.

The JavaScript testing incumbent: batteries included, snapshots, huge ecosystem.

The enterprise feature-flag platform, with experimentation layered on top.

A local AWS cloud emulator so you can test infrastructure without an AWS bill.

Event analytics with fast, self-serve reporting non-analysts can actually use.

Intercept requests at the network layer so your app code never knows it is mocked.

Microsoft's cross-browser automation library with tracing and auto-waiting built in.

Highly configurable automated dependency updates, free and self-hostable.

The W3C standard for browser automation. Every language, every browser, twenty years of it.

Error tracking with stack traces, release attribution and now session replay.

Developer-first security across dependencies, code, containers and infrastructure.

The static-analysis standard: 30+ languages, quality gates, clean-as-you-code.

Build components in isolation, then test the stories you already wrote.

Real databases and services in throwaway Docker containers, per test run.

Query the DOM the way a user would, not the way the framework does.

Vite-native test runner with instant watch mode and a Jest-compatible API.

The standard HTTP mock server for JVM and beyond: record, replay, stub, simulate faults.

Visual AI that compares screenshots the way a person would, not pixel by pixel.

YAML or JavaScript load tests that run serverless on AWS at large scale.

Rust-based linter and formatter that replaces ESLint and Prettier, very fast.

Monitoring as code: your Playwright scripts, running against production on a schedule.

Enterprise application security platform: SAST, SCA, DAST, IaC and API security.

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

Query your codebase like a database to find vulnerability patterns across the whole repo.

Behaviour-driven development with Gherkin scenarios shared by business and engineering.

Grey-box E2E testing built specifically for React Native.

High-performance load testing with a code-first DSL and superb HTML reports.

Open-source feature flags and experimentation that runs on your data warehouse.

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

Session replay built for engineers: console, network, Redux state and stack traces.

Software composition analysis with automated remediation and licence compliance.

Minimal, unopinionated Node.js test runner you assemble to taste.

Consumer-driven contract testing so services can deploy independently.

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

Open-source product analytics, replay, flags and experiments in one self-hostable platform.

Chrome automation library from the Chrome team. Great for scraping, thin for testing.

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

Pattern-based static analysis where rules look like the code they match.

Feature flags, experimentation and product analytics in one warehouse-friendly platform.

In-process HTTP assertions for Node.js apps, without binding a port.

Open-source feature management with a privacy-first, self-hosted architecture.

A batteries-included JavaScript framework over WebDriver and Chrome DevTools.

Concurrent Node.js test runner that isolates every file in its own process.

Automated code review with security scanning and coverage in the pull request.

Maintainability and technical-debt tracking with a ten-point rating.

Simple, cheap feature flags with unlimited team members on every plan.

Static analysis with autofix, tuned hard for low false-positive rates.

Warehouse-native experimentation with a serious statistics engine.

Open-source feature flags and remote config with straightforward self-hosting.

Behaviour-driven JavaScript testing framework with no external dependencies.

Integrated W3C WebDriver framework with a readable, chainable API.

Node.js's built-in test runner. Zero dependencies, already installed.

Open-source, self-hosted session replay — your user data never leaves your infrastructure.

JetBrains' IDE inspections, running as a CI quality gate.

Feature delivery with automatic impact measurement on every flag.

Node.js E2E testing with no WebDriver, no plugins and no browser binaries to manage.

Open-source visual testing with a GitHub-native review experience.

Free accessibility checker and rules engine from IBM, with a strong developer extension.

Open-source visual regression with an optional hosted review platform.

Open-source data anonymisation and synthetic-data generation you can self-host.

Outsourced E2E coverage: they write and maintain your Playwright suite.

Generate a coherent, schema-aware seed database for local development and tests.