Open-source developer tools
Replacing: Postman, GitHub Copilot
| Project | What it is | Stars | Last release | Replaces |
|---|---|---|---|---|
| Hoppscotch Active MIT | An API development tool for testing REST, GraphQL and WebSocket APIs, available as web, desktop and CLI apps. | 80.7k | Sep 30, 2026 | Postman |
| Aider Active Apache-2.0 | Aider is AI pair programming in your terminal. | 49.8k | Feb 12, 2026 | GitHub Copilot |
| Bruno Active MIT | Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia). | 47.9k | Oct 22, 2026 | Postman |
| Insomnia Active Apache-2.0 | The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage. | 40.1k | Oct 29, 2026 | Postman |
| Continue Active Apache-2.0 | An open-source AI coding assistant for VS Code and JetBrains that works with many AI models. | 36.4k | Jun 19, 2026 | GitHub Copilot |
| Tabby Active Mixed or custom | Self-hosted AI coding assistant. | 33.9k | Mar 2, 2026 | GitHub Copilot |