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.

Synthetic checks correlated with APM traces, logs and infrastructure metrics.

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.

Heatmaps, recordings and on-site surveys aimed at product and marketing teams.

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

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

Google's built-in audit for performance, accessibility, SEO and best practices.

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

Free, unlimited session replay and heatmaps. Genuinely free, at any traffic volume.

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.

The free, open-source DAST scanner that attacks your running application.

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

The API platform most developers already have open: requests, collections, tests, mocks.

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.

Deque's commercial layer over axe-core: guided manual testing and enterprise reporting.

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

Managed cloud execution for JMeter, Gatling, k6 and Selenium scripts.

Git-native API client that stores collections as plain files in your repo.

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.

Enterprise experience analytics that quantify the revenue impact of a UX problem.

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

Grey-box E2E testing built specifically for React Native.

Full-stack observability with automatic dependency mapping and AI root-cause analysis.

Google's device farm: run Espresso, XCUITest or a crawler on real hardware.

Retroactive analytics: define a metric today and get its history from recorded sessions.

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

Secrets detection across your repositories, history and developer machines.

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

Autocapture analytics: every interaction is tracked, so you never miss an event again.

Clean, fast API client with strong GraphQL and gRPC support.

API testing, mocks, performance and UI automation in one Gherkin-based DSL.

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

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

Mobile UI testing in a few lines of YAML, with tolerance for flakiness built in.

Self-hosted web analytics with 100% data ownership and no sampling.

Software composition analysis with automated remediation and licence compliance.

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

Spin up a realistic mock API from a desktop app in under a minute.

Scripted browser and API monitors included in New Relic's usage-based platform.

The original web experimentation platform, now a full digital experience suite.

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.

Run your own browser grid on your own infrastructure, for free.

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.

Application security as a service, with policy enforcement and compliance attestation.

Experimentation plus heatmaps, replay and surveys in one conversion-optimisation suite.

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

European experimentation and personalisation platform with strong GDPR positioning.

Automation-first test management built around the Allure reporting format.

Design, mock, test and document APIs in one integrated workspace.

One-command HTTP benchmarking for a quick answer about a single endpoint.

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

Free, self-hosted visual regression testing driven by a JSON config.

Uptime monitoring, incident management and status pages in one affordable product.

Point-and-click website feedback that pins comments to the exact element.

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.

k6-powered checks inside Grafana Cloud, alongside your existing dashboards.

Lightweight browser-based API client you can self-host in a container.

Behaviour-driven JavaScript testing framework with no external dependencies.

Experimentation and personalisation with a strong hybrid client/server model.

Accessibility platform combined with expert audits and legal-risk support.

Low-code, AI-assisted test automation with self-healing locators.

In-page bug reporting that attaches console logs, network activity and a replay.

Design a realistic dataset in the browser and export it as CSV, JSON or SQL.

Behaviour analytics with friction scoring and form-drop-off analysis.

Enterprise performance testing with strong SAP, Citrix and Oracle support.

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.

The original enterprise load-testing suite. Fifty-plus protocols, decades of use.

Command-line accessibility testing for CI, with a dashboard for tracking over time.

Enterprise mobile and web testing cloud with carrier-network and biometric coverage.

Turn an OpenAPI document into a mock server that validates as well as responds.

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

Session replay with equally strong native mobile app support.

Feature delivery with automatic impact measurement on every flag.

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

AI-assisted authoring with smart locators, now part of Tricentis.

Combined bug reporting and product-feedback capture with survey tooling.

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

AI-maintained web and mobile tests aimed at teams with no automation engineers.

Privacy-focused A/B testing with unlimited experiments and no data selling.

Global device infrastructure focused on performance and real network conditions.

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

Real-device cloud with the option to connect your own devices to the same platform.

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

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

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

Open-source API testing configured entirely in YAML, built for pipelines.

Straightforward, keenly priced Selenium and Appium grid from a small European vendor.

Natural-language authoring with self-healing, aimed at enterprise QA teams.