Cotter is the easiest way to add passwordless login to websites built on No-Code website builders like Webflow, Wix, Wordpress, etc. Simply copy and paste a URL and you will instantly be able to authenticate your users!

An authentication SDK that lets users log in using only their Phone Numbers without a password.

Integrate secure phone number login to your web/apps. It’s universal, works across apps, and doesn't require users to have a Cotter account.

*Free for email logins*

Cotter is the fastest way to convert users -- we let you build apps and websites with instant, passwordless login. We save engineering time by creating an SDK that developers can copy and paste in minutes!