Kutt vs Sink
Kutt and Sink are both URL shortener software. Kutt is open source under MIT, with 11k GitHub stars. Sink is open source under AGPL-3.0, with 7.2k GitHub stars.
Which to pick
- Pick Kutt when
- You want a modern self-hosted Bitly alternative with a clean interface.
- Pick Sink when
- You already use Cloudflare and want branded short links with analytics at near-zero hosting cost.
Side by side
A URL shortener with custom domains, link editing, statistics and user management, available as kutt.to or self-hosted.
A serverless link shortener with click analytics that runs entirely on Cloudflare Workers, KV and Analytics Engine.
The old kutt.it domain is no longer theirs and may be a phishing site; use kutt.to or your own instance.
Tied to Cloudflare, pre-1.0, and AGPL licensed.
Production-ready
Usable
Self-hosted server and cloud service
Cloud service
JavaScript, Node.js, Express, SQLite, PostgreSQL and Redis
TypeScript, Vue, Nuxt and Cloudflare Workers
Open source, MIT (permissive)
Open source, AGPL-3.0 (network copyleft)
You can build it into a product you sell, as long as you keep its copyright notice.
Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.
11k GitHub stars
7.2k GitHub stars
Established: started 8 years ago, latest release v3.2.6.
Established: started 2 years ago, latest release v0.3.1.
Other comparisons
More URL shorteners
Both sides were judged on 2026-11-03 from each project's README and GitHub data. License, age and popularity lines are worked out directly.