Yaak
Local-first, open-source desktop API client by the Insomnia creator.
About
Yaak is a local-first desktop API client for REST, GraphQL, WebSocket, server-sent events and gRPC, built with Tauri, Rust and React. It was started by Greg Schier, the developer who originally created Insomnia before its sale to Kong, as a deliberate return to a fast, private tool with no signup, telemetry or cloud lock-in.
It imports collections from Postman, Insomnia, OpenAPI and curl, supports OAuth 2.0 and JWT auth, chains requests with dynamic references, encrypts local secrets, mirrors workspaces to the filesystem for Git versioning, and can be extended with plugins. The project is MIT-licensed and funded by community-purchased licenses.
What it can do
- REST, GraphQL, gRPC, WebSocket and SSE requests
- Imports from Postman, Insomnia, OpenAPI and curl
- Encrypted local secrets and Git-friendly workspace mirroring
- Plugin system for auth, template tags and themes
Setup
Download the desktop app from yaak.app for Mac, Windows or Linux.
Prerequisites
None; works offline with no account required.
Use cases
Works with
Trust score — 7/10
Scored 7/10 (metrics tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 92; Trending score 74/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.