Yaak
Developer ToolsFast, offline, open-source API client that works with Git
What it does
Fast, offline, Git-friendly desktop API client (REST, GraphQL, gRPC, WebSocket) with an agent-ready CLI; open source (MIT), built with Rust and Tauri. Free for personal use; paid license for work use. The canonical figure is the TrustMRR USD MRR ($5,406 seen on 2026-10-31, Stripe; listing alias 'mountain-loop-labs-inc').
Who it is for
Developers and teams who test APIs and want a local, account-free alternative to Postman or Insomnia.
Why it can be replicated
Desktop app
Tauri + Rust with a web UI; replicable but large in scope (multiple protocols).
Open core model
Free for personal use, commercial license per person or per seat.
Founder reputation
Original creator of Insomnia; distribution that is hard to replicate.
MVP in 12 weeks
Replication estimate; does not describe the product’s actual development.
HTTP core
REST request editor · Environments and variables · Local history
Git and collections
Collections as files in the repo · Import from Postman/Insomnia
Licensing
License checkout · In-app license validation · macOS/Windows/Linux builds
Save for later
Ways to differentiate
- 1
AI agents
Agent-ready CLI and workflows.
- 2
Teams
Per-seat Business licenses.
- 3
Niches
Specialized API clients (gRPC, contract testing).
Data and evidence
- Financial verification
- Pending
- Editorial review
- Oct 31, 2026
- Product language
- Not specified
- Confirmed markets
- Not specified
TrustMRR active subscriptions.
The reference mentions TrustMRR. This does not certify this listing’s figure.
View financial evidence- IMPORTANT: the TrustMRR slug (mountain-loop-labs-inc, company Mountain Loop Labs) ≠ product id; the listing is titled 'Yaak' and links to yaak.app. /startup/yaak returns 404. Matched by alias (Lio Option A).
- TrustMRR (Stripe API key, not an audit), seen 2026-10-31 (last updated 'Oct 31, 2026, 08:03 PM'): MRR $5,406; last 30 days $4,787; all-time $92,554; 441 active subscriptions; founder Greg Schier; founded Oct 2024; Canada. The editorial expected ~$5,410 / 442 subs; the live value is used.
- Headline TrustMRR $5,406 (mrr-reference); provenance.originalMrr=5000 (claim from the 2026-09-22 post 'Yaak just crossed $5k MRR').
- Pricing observed at yaak.app/pricing: free for personal use; Individual $79 / year or $399 one time; Business $149 / user / year. pricing.from=79/year.
- Stack: Rust and Tauri observed (TrustMRR 'Open source, MIT-licensed, built with Rust and Tauri'); Stripe observed as payment backend on TrustMRR; TypeScript inferred.
- Soft flags: crowded category; open source/free tier; hard to replicate in depth.
- Logo: apple-touch-icon 180×180 upscaled to 192×192.
No comparable history available. Growth and ARPU are not estimated from different periods.
Product and links
Yaak
Fast, offline, open-source API client that works with Git
Visit the official website for the product and current pricing.
yaak.appNo screenshot or invented interface of the real product is shown.
