Secured with Touch ID

Every time a user logs in, they will be uniquely identified with their fingerprint using Apple's Touch ID

technology. With secure biometrics, you can trust that your users are who they say they are.



If a user's device doesn't support Touch ID, Clef securely falls back to a PIN on the device

 there's always a second-factor.



Learn more about Touch ID



Time-tested security

Clef runs on an RSA public-key architecture, technology that developers have been using to secure

their logins for years. We let the phone handle the hard cryptography and give your users an

experience they'll love.



See the documentation



Fraud detection & monitoring

We use location, usage, and hardware data to make sure every authentication is genuine.

With each user tied uniquely to a phone, Clef protects your site from fraud and abuse.

With our security team handling threats, you'll have more time to focus on product.



Go to sign up

Every time a user logs in, they will be uniquely identified with their fingerprint using Apple's Touch IDtechnology. With secure biometrics, you can trust that your users are who they say they are.If a user's device doesn't support Touch ID, Clef securely falls back to a PIN on the device there's always a second-factor.Clef runs on an RSA public-key architecture, technology that developers have been using to securetheir logins for years. We let the phone handle the hard cryptography and give your users anexperience they'll love.We use location, usage, and hardware data to make sure every authentication is genuine.With each user tied uniquely to a phone, Clef protects your site from fraud and abuse.With our security team handling threats, you'll have more time to focus on product.



https://i.imgur.com/edleKYo.png

Log out from anywhere

With Clef, users can log out of their computer browsing session from anywhere in the world.

With a single tap of the logout button on their mobile device, they'll be logged out of your website.



Learn more With Clef, users can log out of their computer browsing session from anywhere in the world.With a single tap of the logout button on their mobile device, they'll be logged out of your website.



https://i.imgur.com/nSphBQk.png

Built for the world

Clef is already internationalized in 10+ languages and we have more on the way. No matter where

your users are in the world, they'll get a hand-crafted experience for their location.



Somewhere else?

Shoot us an email and we'll work with our team of language specialists to make it happen.



See the languages Clef supports Clef is already internationalized in 10+ languages and we have more on the way. No matter whereyour users are in the world, they'll get a hand-crafted experience for their location.Somewhere else?Shoot us an email and we'll work with our team of language specialists to make it happen.



https://i.imgur.com/aXMRM38.png

iOS & Android

We've built native apps for the best mobile platforms in the world. On both iOS and Android, your users

will enjoy a beautiful experience hand-crafted for their operating system.



Download the apps We've built native apps for the best mobile platforms in the world. On both iOS and Android, your userswill enjoy a beautiful experience hand-crafted for their operating system.



https://i.imgur.com/W40Kvvl.png

Deploy Clef for $0, pay as you need

You can use Clef for unlimited users and logins forever. For even more features, Clef is the cheapest

two-factor on the market.



See pricing You can use Clef for unlimited users and logins forever. For even more features, Clef is the cheapesttwo-factor on the market.



https://i.imgur.com/BuYoEqb.png

Super simple integration

Two-factor has been on your timeline for months, but you can never spare the developer time. With Clef,

you can be up and running with the best two-factor in the world in less than a day.



Explore the documentation Two-factor has been on your timeline for months, but you can never spare the developer time. With Clef,you can be up and running with the best two-factor in the world in less than a day.