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.
20 tools
Faker
Test Data & Mocks
Generate realistic names, addresses, dates and text for fixtures, in any language.
LocalStack
Test Data & Mocks
A local AWS cloud emulator so you can test infrastructure without an AWS bill.
Mock Service Worker
Test Data & Mocks
Intercept requests at the network layer so your app code never knows it is mocked.
Postman
API Testing
The API platform most developers already have open: requests, collections, tests, mocks.
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.
BlazeMeter
Load & Performance
Managed cloud execution for JMeter, Gatling, k6 and Selenium scripts.
Karate
API Testing
API testing, mocks, performance and UI automation in one Gherkin-based DSL.
Mockoon
Test Data & Mocks
Spin up a realistic mock API from a desktop app in under a minute.
SoapUI / ReadyAPI
API Testing
The long-standing tool for SOAP, JMS and enterprise protocol testing.
Tricentis Tosca
E2E & UI Testing
Model-based enterprise test automation for SAP, mainframe and packaged applications.
Apidog
API Testing
Design, mock, test and document APIs in one integrated workspace.
Mockaroo
Test Data & Mocks
Design a realistic dataset in the browser and export it as CSV, JSON or SQL.
Prism
Test Data & Mocks
Turn an OpenAPI document into a mock server that validates as well as responds.
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.
Hoverfly
Test Data & Mocks
Lightweight service virtualisation: capture real traffic, then simulate it.
Neosync
Test Data & Mocks
Archived: open-source data anonymisation, no longer maintained after the Grow Therapy acquisition.
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.