All testing tools

Behavioural product analytics with strong cohort and retention analysis.

The open-source workhorse: every protocol, a GUI, and twenty-five years of plugins.

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.

The professional web security tester's tool of choice, plus an enterprise scanner.

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.

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

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

Issue tracking where the code already lives, free for most teams.

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 default enterprise issue tracker, endlessly configurable for better and worse.

The Java testing standard, rebuilt with extensions and parameterised tests.

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.

The PHP testing standard, integrated into every major PHP framework.

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.

The de facto Python testing framework: fixtures, parametrisation, plugins.

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

Extremely fast Python linter and formatter that replaces most of the toolchain.

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.

The most widely deployed standalone test management tool.

One open-source scanner for containers, filesystems, repos, IaC and Kubernetes.

The largest participant network for moderated and unmoderated usability studies.

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.

Apple's native UI testing framework, built into Xcode.

Jira-native test management where test cases are Jira issues.

The modern .NET testing framework, and the one Microsoft's templates default to.

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.

All-in-one low-code platform covering web, API, mobile and desktop.

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

Fast, opinionated issue tracking that engineering teams actively like using.

Write load tests as plain Python. Scale by adding workers.

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.

Rapid unmoderated testing on live products and Figma prototypes, with quantitative output.

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 long-standing .NET test framework with the richest assertion set.

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.

A friendlier front end for PHPUnit with a function-based, expressive API.

Long-established uptime and transaction monitoring, now part of SolarWinds.

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

High-quality participant recruitment for surveys and studies, originally from academia.

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

Fluent Java DSL for testing REST services inside your existing JVM test suite.

Keyword-driven acceptance testing that reads like structured English.

Ruby's behaviour-driven testing framework with an exceptionally readable DSL.

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.

Enterprise accessibility, SEO and content-quality governance across whole websites.

The long-standing tool for SOAP, JMS and enterprise protocol testing.

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

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

Java test framework built for suite configuration, grouping and data providers.

Model-based enterprise test automation for SAP, mainframe and packaged applications.

Open-source secret scanning that verifies whether the credential is still live.

Python's standard-library xUnit framework. Always there, never exciting.

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

Free uptime monitoring for 50 endpoints. The pragmatic starting point.

Recruitment marketplace: find and pay participants, bring your own research method.

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

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

Visual accessibility evaluation that shows problems in place on the page.

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

SmartBear's Jira-native test management, built for scale and reuse.

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.

Microsoft's test management, included in the Azure DevOps stack.

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.

Research repository: store, tag and search every interview your organisation has run.

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.

DAST with proof-based scanning that confirms a vulnerability is real before reporting it.

One-click bug reports with a replay, console and network log for developers.

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.

Fast, affordable design testing: five-second tests, first-click, preference, surveys.

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.

Information-architecture research: card sorting, tree testing, first-click.

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.

Modern, fast test management with a workable free tier and clean API.

Enterprise test management with quality analytics and deep Jira integration.

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

Windows-centric automation for desktop, web and mobile from one IDE.

Free, self-hosted project and issue tracking that has outlived most competitors.

Recruiting for hard-to-reach B2B and professional participants.

Property-based fuzzing that generates API tests straight from your OpenAPI schema.

Session replay with equally strong native mobile app support.

Feature delivery with automatic impact measurement on every flag.

Affordable uptime, page-speed, SSL and domain monitoring from many global locations.

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.

Write tests in plain English, run them on web, mobile and APIs.

De-identify production data into safe, realistic, referentially intact test databases.

Moderated and unmoderated testing with a global panel and flexible pricing.

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

Constant-rate HTTP load testing from the command line, in Go.

JetBrains' issue tracker with a query language built for fast bulk triage.

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.

End-to-end research operations: recruit, schedule, run, analyse, share.

Generative synthetic data with differential-privacy guarantees.

Global device infrastructure focused on performance and real network conditions.

Lightweight service virtualisation: capture real traffic, then simulate it.

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.

Visual flowchart automation designed for business users, not engineers.

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.

No-code test automation with an on-demand human tester fallback.

No-code browser testing recorded in the cloud, with visual and API assertions.

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

Turn OpenAPI and AsyncAPI specs into executable contracts and smart mocks.

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

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

Lightweight European test management with straightforward pricing.

Unified management of manual test cases, exploratory sessions and automation results.

Prototype and live-site testing with heatmaps and clear flow analytics.

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

No-code mobile testing recorded in a browser-based device session.