- Stars
- 77,141
- License
- MIT
- Last commit
- 3 days ago
TypeScriptActive
Best API Clients & Testing Tools
Explore leading tools in the API Clients & Testing category, including open-source options and SaaS products. Compare features, use cases, and find the best fit for your workflow.
10+ open-source projects · 8 SaaS products
Top open-source API Clients & Testing
These projects are active, self-hostable choices for knowledge management teams evaluating alternatives to SaaS tools.
- Stars
- 39,045
- License
- MIT
- Last commit
- 3 days ago
JavaScriptActive
- Stars
- 37,621
- License
- Apache-2.0
- Last commit
- 7 days ago
TypeScriptActive
- Stars
- 37,123
- License
- BSD-3-Clause
- Last commit
- 11 months ago
PythonStable
- Stars
- 18,200
- License
- Apache-2.0
- Last commit
- 3 days ago
RustActive
- Stars
- 16,508
- License
- MIT
- Last commit
- 4 days ago
TypeScriptActive
Most starred project
77,141★
Lightweight API development ecosystem for testing and collaboration
Recently updated
3 days ago
Requestly combines a Postman‑style API client, Charles‑like HTTP interceptor, and powerful mocking tools into a local‑first Chrome extension and desktop app, supporting environments, imports, and team collaboration.
Dominant language
TypeScript • 7 projectsExpect a strong TypeScript presence among maintained projects.
Popular SaaS Platforms to Replace
Understand the commercial incumbents teams migrate from and how many open-source alternatives exist for each product.
Apidog
All-in-one API platform to design, debug, mock, and test with CI/CD
API Clients & Testing
Alternatives tracked
18 alternatives
BlazeMeter
Continuous testing platform for performance, API, and functional testing at scale
API Clients & Testing
Alternatives tracked
18 alternatives
Insomnia
Collaborative API development platform for building and testing APIs
API Clients & Testing
Alternatives tracked
18 alternatives
Postman
API development and testing platform
API Clients & Testing
Alternatives tracked
18 alternatives
RapidAPI for Mac
Native macOS HTTP client for API development and testing
API Clients & Testing
Alternatives tracked
18 alternatives
ReadyAPI
Enterprise API testing suite for functional, security, performance, and virtualization
API Clients & Testing
Alternatives tracked
18 alternatives
Most compared product
10+ open-source alternatives
Apidog combines visual API design, interactive docs, automated testing, and mocking in a single workspace, with integrations for pipelines.
Leading hosted platforms
Frequently replaced when teams want private deployments and lower TCO.
Explore related categories
Browse neighbouring categories in DevOps & Platform to widen your evaluation.
- AI Code Assistants & AutocompleteIn-IDE AI coding assistants for chat, autocomplete, refactors, tests and codebase Q&A.
- API GatewaysGateways for managing, securing, and routing API requests (REST, GraphQL).
- Backend-as-a-Service (BaaS)Back-end platforms providing ready-to-use API services (auth, database, storage).
- CDN & Edge CachingEdge content delivery and caching (global POPs, geo routing, purge, origin shielding).
- CI/CD PipelinesContinuous integration and delivery systems for build, test, and deploy pipelines.
- Cloud IDEs & Remote Dev EnvironmentsOn-demand, containerized developer workspaces in the cloud or self-hosted.