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.
193 tools
Amplitude
Session Replay
Behavioural product analytics with strong cohort and retention analysis.
Apache JMeter
Load & Performance
The open-source workhorse: every protocol, a GUI, and twenty-five years of plugins.
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.
Burp Suite
Security Testing
The professional web security tester's tool of choice, plus an enterprise scanner.
Cypress
E2E & UI Testing
Developer-first browser testing with an interactive runner developers actually enjoy.
Datadog Synthetic Monitoring
Monitoring
Synthetic checks correlated with APM traces, logs and infrastructure metrics.
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.
Espresso
Mobile Testing
Google's native Android UI testing framework. Fast, stable, Android-only.
Faker
Test Data & Mocks
Generate realistic names, addresses, dates and text for fixtures, in any language.
GitHub Issues & Projects
Bug Tracking
Issue tracking where the code already lives, free for most teams.
Grafana k6
Load & Performance
Developer-first load testing: JavaScript scripts, Go engine, CI-native thresholds.
Hotjar
Session Replay
Closed to new signups — Hotjar has been absorbed into Contentsquare.
Jest
Unit & Component
The JavaScript testing incumbent: batteries included, snapshots, huge ecosystem.
Jira
Bug Tracking
The default enterprise issue tracker, endlessly configurable for better and worse.
JUnit 5
Unit & Component
The Java testing standard, rebuilt with extensions and parameterised tests.
LaunchDarkly
A/B & Flags
The enterprise feature-flag platform, with experimentation layered on top.
Lighthouse
Accessibility
Google's built-in audit for performance, accessibility, SEO and best practices.
LocalStack
Test Data & Mocks
A local AWS cloud emulator so you can test infrastructure without an AWS bill.
Microsoft Clarity
Session Replay
Free, unlimited session replay and heatmaps. Genuinely free, at any traffic volume.
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.
OWASP ZAP
Security Testing
The free, open-source DAST scanner that attacks your running application.
PHPUnit
Unit & Component
The PHP testing standard, integrated into every major PHP framework.
Playwright
E2E & UI Testing
Microsoft's cross-browser automation library with tracing and auto-waiting built in.
Postman
API Testing
The API platform most developers already have open: requests, collections, tests, mocks.
pytest
Unit & Component
The de facto Python testing framework: fixtures, parametrisation, plugins.
Renovate
Security Testing
Highly configurable automated dependency updates, free and self-hostable.
Ruff
Code Quality
Extremely fast Python linter and formatter that replaces most of the toolchain.
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.
TestRail
Test Management
The most widely deployed standalone test management tool.
Trivy
Security Testing
One open-source scanner for containers, filesystems, repos, IaC and Kubernetes.
UserTesting
User Research
The largest participant network for moderated and unmoderated usability studies.
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.
XCUITest
Mobile Testing
Apple's native UI testing framework, built into Xcode.
Xray
Test Management
Jira-native test management where test cases are Jira issues.
xUnit.net
Unit & Component
The modern .NET testing framework, and the one Microsoft's templates default to.
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.
axe DevTools
Accessibility
Deque's commercial layer over axe-core: guided manual testing and enterprise reporting.
Biome
Code Quality
Rust-based linter and formatter that replaces ESLint and Prettier, very fast.
BlazeMeter
Load & Performance
Managed cloud execution for JMeter, Gatling, k6 and Selenium scripts.
Bruno
API Testing
Git-native API client that stores collections as plain files in your repo.
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.
Contentsquare
Session Replay
Enterprise experience analytics that quantify the revenue impact of a UX problem.
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.
Dynatrace
Monitoring
Full-stack observability with automatic dependency mapping and AI root-cause analysis.
Firebase Test Lab
Mobile Testing
Google's device farm: run Espresso, XCUITest or a crawler on real hardware.
FullStory
Session Replay
Retroactive analytics: define a metric today and get its history from recorded sessions.
Gatling
Load & Performance
High-performance load testing with a code-first DSL and superb HTML reports.
GitGuardian
Security Testing
Secrets detection across your repositories, history and developer machines.
GrowthBook
A/B & Flags
Open-source feature flags and experimentation that runs on your data warehouse.
Heap
Session Replay
Autocapture analytics: every interaction is tracked, so you never miss an event again.
Insomnia
API Testing
Clean, fast API client with strong GraphQL and gRPC support.
Karate
API Testing
API testing, mocks, performance and UI automation in one Gherkin-based DSL.
Katalon Studio
E2E & UI Testing
All-in-one low-code platform covering web, API, mobile and desktop.
Linear
Bug Tracking
Fast, opinionated issue tracking that engineering teams actively like using.
Locust
Load & Performance
Write load tests as plain Python. Scale by adding workers.
LogRocket
Session Replay
Session replay built for engineers: console, network, Redux state and stack traces.
Maestro
Mobile Testing
Mobile UI testing in a few lines of YAML, with tolerance for flakiness built in.
Matomo
Session Replay
Self-hosted web analytics with 100% data ownership and no sampling.
Maze
User Research
Rapid unmoderated testing on live products and Figma prototypes, with quantitative output.
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.
Mockoon
Test Data & Mocks
Spin up a realistic mock API from a desktop app in under a minute.
New Relic Synthetic Monitoring
Monitoring
Scripted browser and API monitors included in New Relic's usage-based platform.
NUnit
Unit & Component
The long-standing .NET test framework with the richest assertion set.
Optimizely
A/B & Flags
The original web experimentation platform, now a full digital experience suite.
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.
Pest
Unit & Component
A friendlier front end for PHPUnit with a function-based, expressive API.
Pingdom
Monitoring
Long-established uptime and transaction monitoring, now part of SolarWinds.
PostHog
Session Replay
Open-source product analytics, replay, flags and experiments in one self-hostable platform.
Prolific
User Research
High-quality participant recruitment for surveys and studies, originally from academia.
Puppeteer
E2E & UI Testing
Chrome automation library from the Chrome team. Great for scraping, thin for testing.
REST Assured
API Testing
Fluent Java DSL for testing REST services inside your existing JVM test suite.
Robot Framework
E2E & UI Testing
Keyword-driven acceptance testing that reads like structured English.
RSpec
Unit & Component
Ruby's behaviour-driven testing framework with an exceptionally readable DSL.
Sauce Labs
Device Cloud
Enterprise-grade device cloud with deep analytics and strong security posture.
Selenium Grid
Device Cloud
Run your own browser grid on your own infrastructure, for free.
Semgrep
Security Testing
Pattern-based static analysis where rules look like the code they match.
Siteimprove
Accessibility
Enterprise accessibility, SEO and content-quality governance across whole websites.
SoapUI / ReadyAPI
API Testing
The long-standing tool for SOAP, JMS and enterprise protocol testing.
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.
TestNG
Unit & Component
Java test framework built for suite configuration, grouping and data providers.
Tricentis Tosca
E2E & UI Testing
Model-based enterprise test automation for SAP, mainframe and packaged applications.
TruffleHog
Security Testing
Open-source secret scanning that verifies whether the credential is still live.
unittest
Unit & Component
Python's standard-library xUnit framework. Always there, never exciting.
Unleash
A/B & Flags
Open-source feature management with a privacy-first, self-hosted architecture.
UptimeRobot
Monitoring
Free uptime monitoring for 50 endpoints. The pragmatic starting point.
User Interviews
User Research
Recruitment marketplace: find and pay participants, bring your own research method.
Veracode
Security Testing
Application security as a service, with policy enforcement and compliance attestation.
VWO
A/B & Flags
Experimentation plus heatmaps, replay and surveys in one conversion-optimisation suite.
WAVE
Accessibility
Visual accessibility evaluation that shows problems in place on the page.
WebdriverIO
E2E & UI Testing
A batteries-included JavaScript framework over WebDriver and Chrome DevTools.
Zephyr Scale
Test Management
SmartBear's Jira-native test management, built for scale and reuse.
AB Tasty
A/B & Flags
European experimentation and personalisation platform with strong GDPR positioning.
Allure TestOps
Test Management
Automation-first test management built around the Allure reporting format.
Apidog
API Testing
Design, mock, test and document APIs in one integrated workspace.
autocannon
Load & Performance
One-command HTTP benchmarking for a quick answer about a single endpoint.
AVA
Unit & Component
Concurrent Node.js test runner that isolates every file in its own process.
Azure Test Plans
Test Management
Microsoft's test management, included in the Azure DevOps stack.
BackstopJS
Visual Testing
Free, self-hosted visual regression testing driven by a JSON config.
Better Stack
Monitoring
Uptime monitoring, incident management and status pages in one affordable product.
BugHerd
Bug Tracking
Point-and-click website feedback that pins comments to the exact element.
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.
Crazy Egg
Session Replay
Heatmaps, recordings and A/B testing in one tool, priced by pageview.
DeepSource
Code Quality
Static analysis with autofix, tuned hard for low false-positive rates.
Dovetail
User Research
Research repository: store, tag and search every interview your organisation has run.
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.
Grafana Synthetic Monitoring
Monitoring
k6-powered checks inside Grafana Cloud, alongside your existing dashboards.
Hoppscotch
API Testing
Lightweight browser-based API client you can self-host in a container.
Invicti
Security Testing
DAST with proof-based scanning that confirms a vulnerability is real before reporting it.
Jam
Bug Tracking
One-click bug reports with a replay, console and network log for developers.
Jasmine
Unit & Component
Behaviour-driven JavaScript testing framework with no external dependencies.
Kameleoon
A/B & Flags
Experimentation and personalisation with a strong hybrid client/server model.
Level Access
Accessibility
Accessibility platform combined with expert audits and legal-risk support.
Lyssna
User Research
Fast, affordable design testing: five-second tests, first-click, preference, surveys.
mabl
E2E & UI Testing
Low-code, AI-assisted test automation with self-healing locators.
Marker.io
Bug Tracking
In-page bug reporting that attaches console logs, network activity and a replay.
Mockaroo
Test Data & Mocks
Design a realistic dataset in the browser and export it as CSV, JSON or SQL.
Mouseflow
Session Replay
Behaviour analytics with friction scoring and form-drop-off analysis.
NeoLoad
Load & Performance
Enterprise performance testing with strong SAP, Citrix and Oracle support.
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.
OpenText LoadRunner
Load & Performance
The original enterprise load-testing suite. Fifty-plus protocols, decades of use.
Optimal Workshop
User Research
Information-architecture research: card sorting, tree testing, first-click.
Pa11y
Accessibility
Command-line accessibility testing for CI, with a dashboard for tracking over time.
Perfecto
Device Cloud
Enterprise mobile and web testing cloud with carrier-network and biometric coverage.
Prism
Test Data & Mocks
Turn an OpenAPI document into a mock server that validates as well as responds.
Qase
Test Management
Modern, fast test management with a workable free tier and clean API.
Qlty (formerly Code Climate Quality)
Code Quality
Maintainability and technical-debt tracking, spun out of Code Climate as Qlty.
QMetry Test Management
Test Management
Enterprise test management with quality analytics and deep Jira integration.
Qodana
Code Quality
JetBrains' IDE inspections, running as a CI quality gate.
Ranorex Studio
E2E & UI Testing
Windows-centric automation for desktop, web and mobile from one IDE.
Redmine
Bug Tracking
Free, self-hosted project and issue tracking that has outlived most competitors.
Respondent
User Research
Recruiting for hard-to-reach B2B and professional participants.
Schemathesis
API Testing
Property-based fuzzing that generates API tests straight from your OpenAPI schema.
Smartlook
Session Replay
Session replay with equally strong native mobile app support.
Split
A/B & Flags
Feature delivery with automatic impact measurement on every flag.
StatusCake
Monitoring
Affordable uptime, page-speed, SSL and domain monitoring from many global locations.
Survicate
User Research
Ask the question where the behaviour happened: in-product, email, mobile or link.
TestCafe
E2E & UI Testing
Node.js E2E testing with no WebDriver, no plugins and no browser binaries to manage.
Testim
E2E & UI Testing
AI-assisted authoring with smart locators, now part of Tricentis.
Testsigma
E2E & UI Testing
Write tests in plain English, run them on web, mobile and APIs.
Tonic.ai
Test Data & Mocks
De-identify production data into safe, realistic, referentially intact test databases.
Userlytics
User Research
Moderated and unmoderated testing with a global panel and flexible pricing.
Usersnap
Bug Tracking
Combined bug reporting and product-feedback capture with survey tooling.
Vegeta
Load & Performance
Constant-rate HTTP load testing from the command line, in Go.
YouTrack
Bug Tracking
JetBrains' issue tracker with a query language built for fast bulk triage.
Argos
Visual Testing
Open-source visual testing with a GitHub-native review experience.
Autify
E2E & UI Testing
AI-maintained web and mobile tests aimed at teams with no automation engineers.
Convert Experiences
A/B & Flags
Privacy-focused A/B testing with unlimited experiments and no data selling.
Great Question
User Research
End-to-end research operations: recruit, schedule, run, analyse, share.
Gretel.ai
Test Data & Mocks
Discontinued as a standalone product; the technology now ships inside NVIDIA NeMo.
HeadSpin
Mobile Testing
Global device infrastructure focused on performance and real network conditions.
Hoverfly
Test Data & Mocks
Lightweight service virtualisation: capture real traffic, then simulate it.
IBM Equal Access Toolkit
Accessibility
Free accessibility checker and rules engine from IBM, with a strong developer extension.
Kobiton
Mobile Testing
Real-device cloud with the option to connect your own devices to the same platform.
Leapwork
E2E & UI Testing
Visual flowchart automation designed for business users, not engineers.
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.
Rainforest QA
E2E & UI Testing
No-code test automation with an on-demand human tester fallback.
Reflect
E2E & UI Testing
No-code browser testing recorded in the cloud, with visual and API assertions.
Snaplet Seed
Test Data & Mocks
Generate a coherent, schema-aware seed database for local development and tests.
Specmatic
API Testing
Turn OpenAPI and AsyncAPI specs into executable contracts and smart mocks.
Step CI
API Testing
Open-source API testing configured entirely in YAML, built for pipelines.
TestingBot
Device Cloud
Straightforward, keenly priced Selenium and Appium grid from a small European vendor.
Testiny
Test Management
Lightweight European test management with straightforward pricing.
Testmo
Test Management
Unified management of manual test cases, exploratory sessions and automation results.
Useberry
User Research
Unmoderated tests and live interviews on prototypes and websites, in one tool.
Virtuoso QA
E2E & UI Testing
Natural-language authoring with self-healing, aimed at enterprise QA teams.
Waldo
Mobile Testing
No-code mobile testing recorded in a browser-based device session.
TestDriver
E2E & UI Testing
Vision-model E2E testing that drives a real desktop instead of querying the DOM.