Cutt.ly vs Kutt

Cutt.ly shortens links to cutt.ly URLs and layers on click tracking, custom back-halves, branded domains, and campaign management. Its REST API is called with an API key issued from a Cutt.ly account and returns JSON; the same key drives link creation, editing, and per-link statistics. A free plan covers basic shortening and stats, with paid tiers adding branded domains, team seats, and higher limits.

Kutt is a free, open-source, self-hostable URL shortener supporting custom domains, link expiration, password protection, and per-link statistics. The public instance and REST API live at kutt.to (authenticated with an X-API-Key header), and the AGPL-licensed codebase can be self-hosted for full control. Note that the old kutt.it domain is no longer operated by the project — its maintainers warn it may now be a phishing site — so integrations should target kutt.to.