78.9k
Hoppscotch
Open source API development ecosystem, serving as an efficient and open-source alternative to Postman and Insomnia.
👨💻
Development🔁
API🛠️
Tools
7 Open Source Alternatives to Postman
There are 7 open-source alternatives to Postman in this directory. The most popular is Hoppscotch with 78.9k GitHub stars, followed by JSONCrack.com(37.2k stars). All are open source, free to use, and many can be self-hosted.
Quick comparison
| # | Tool | Stars | Language | License |
|---|---|---|---|---|
| 1 | Hoppscotch Open source API development ecosystem, serving as an efficient and open-source alternative to Postman and Insomnia. | 78.9k | TypeScript | MIT License |
| 2 | JSONCrack.com ✨ An open-source visualization application that transforms various data formats, including JSON, YAML, XML, and CSV, into interactive graphs. | 37.2k | TypeScript | Other |
| 3 | Insomnia The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE, and gRPC, featuring Cloud, Local, and Git storage. | 35.8k | JavaScript | Apache License 2.0 |
| 4 | Yaak yaak is an intuitive desktop API client designed for organizing and executing various types of API requests, including REST, GraphQL, WebSockets, Server Sent Events, and gRPC. Its interface prioritizes usability for developers seeking efficient workflows and robust API testing support. | 18.4k | TypeScript | MIT License |
| 5 | GraphiQL GraphiQL & the GraphQL LSP Reference Ecosystem designed to enhance the development experience by providing tools for building browser and IDE integrations for GraphQL. | 16.8k | TypeScript | MIT License |
| 6 | GraphQL Playground An integrated development environment (IDE) to enhance GraphQL development workflows, featuring GraphQL Subscriptions, interactive documentation, and collaboration tools. | 8.9k | TypeScript | MIT License |
| 7 | Mkinf mkinf SDK to seamlessly interact with mkinf hub MCP servers, enabling efficient server communication. | 134 | Python | MIT License |
All open-source alternatives to Postman
37.2k
JSONCrack.com
✨ An open-source visualization application that transforms various data formats, including JSON, YAML, XML, and CSV, into interactive graphs.
📈
Visualization🛠️
Tools👨💻
Development
35.8k
Insomnia
The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE, and gRPC, featuring Cloud, Local, and Git storage.
🔁
API👨💻
Development🛠️
Tools
18.4k
Yaak
yaak is an intuitive desktop API client designed for organizing and executing various types of API requests, including REST, GraphQL, WebSockets, Server Sent Events, and gRPC. Its interface prioritizes usability for developers seeking efficient workflows and robust API testing support.
👨💻
Development🔁
API💻
Desktop🛠️
Tools
16.8k
GraphiQL
GraphiQL & the GraphQL LSP Reference Ecosystem designed to enhance the development experience by providing tools for building browser and IDE integrations for GraphQL.
👨💻
Development🔁
API🛠️
Tools🌐
Web
8.9k
GraphQL Playground
An integrated development environment (IDE) to enhance GraphQL development workflows, featuring GraphQL Subscriptions, interactive documentation, and collaboration tools.
👨💻
Development🔁
API🛠️
Tools📚
Documentation
134
Mkinf
mkinf SDK to seamlessly interact with mkinf hub MCP servers, enabling efficient server communication.
👨💻
Development🔁
API🛠️
Tools
Frequently asked questions
What are the best open-source alternatives to Postman?
The top three are Hoppscotch(78.9k stars), JSONCrack.com(37.2k stars), Insomnia(35.8k stars). All are open source and free to use.
Are these alternatives to Postman free?
Yes. Every tool listed here is open source and free to use in your own projects. Many can be self-hosted on your own infrastructure, which means no subscription fees and full control over your data.
Can I self-host an alternative to Postman?
Many of the alternatives listed are self-hostable. Each tool's page lists hosting details, system requirements, and licensing terms.
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