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.
66 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.
Burp Suite
Security Testing
The professional web security tester's tool of choice, plus an enterprise scanner.
Dependabot
Security Testing
Free dependency updates and vulnerability alerts, built into GitHub.
Faker
Test Data & Mocks
Generate realistic names, addresses, dates and text for fixtures, in any language.
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.
OWASP ZAP
Security Testing
The free, open-source DAST scanner that attacks your running application.
Playwright
E2E & UI Testing
Microsoft's cross-browser automation library with tracing and auto-waiting built in.
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.
Testcontainers
Test Data & Mocks
Real databases and services in throwaway Docker containers, per test run.
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.
axe DevTools
Accessibility
Deque's commercial layer over axe-core: guided manual testing and enterprise reporting.
BlazeMeter
Load & Performance
Managed cloud execution for JMeter, Gatling, k6 and Selenium scripts.
Checkmarx One
Security Testing
Enterprise application security platform: SAST, SCA, DAST, IaC and API security.
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.
Dynatrace
Monitoring
Full-stack observability with automatic dependency mapping and AI root-cause analysis.
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.
Locust
Load & Performance
Write load tests as plain Python. Scale by adding workers.
Mend.io
Security Testing
Software composition analysis with automated remediation and licence compliance.
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.
PostHog
Session Replay
Open-source product analytics, replay, flags and experiments in one self-hostable platform.
Robot Framework
E2E & UI Testing
Keyword-driven acceptance testing that reads like structured English.
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.
Statsig
A/B & Flags
Feature flags, experimentation and product analytics in one warehouse-friendly platform.
TestMu AI
Device Cloud
Cost-competitive device cloud with an AI-assisted test-orchestration layer.
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.
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.
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.
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.
Kameleoon
A/B & Flags
Experimentation and personalisation with a strong hybrid client/server model.
Mockaroo
Test Data & Mocks
Design a realistic dataset in the browser and export it as CSV, JSON or SQL.
Perfecto
Device Cloud
Enterprise mobile and web testing cloud with carrier-network and biometric coverage.
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.
Schemathesis
API Testing
Property-based fuzzing that generates API tests straight from your OpenAPI schema.
Split
A/B & Flags
Feature delivery with automatic impact measurement on every flag.
Tonic.ai
Test Data & Mocks
De-identify production data into safe, realistic, referentially intact test databases.
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.
Kobiton
Mobile Testing
Real-device cloud with the option to connect your own devices to the same platform.
TestingBot
Device Cloud
Straightforward, keenly priced Selenium and Appium grid from a small European vendor.