Best alternatives to Voiden in 2026

Tools like Postman let you design and test API requests, but they store everything in a cloud account, which means your team's API collections live outside your codebase — syncing them, reviewing changes, or working offline is always a bit awkward. Voiden takes a different approach: it saves each API request as a plain text file (in a format based on Markdown) that lives right in your project's Git repository, so you get version history, code review, and offline access for free, using tools you already use every day. Voiden is a free, open-source (Apache 2.0), Electron-based desktop app for designing, testing, and documenting APIs, available on macOS, Windows, and Linux through package managers like Homebrew, APT, Snap, and Nix. It requires no account and sends no telemetry, supports composable reusable request blocks, and ships a headless CLI runner (@voiden/runner) for CI/CD pipelines. With about 1.7k GitHub stars and 14k+ installs, it's a smaller but genuinely active alternative to Postman and Insomnia.