ThumbSignIn Authentication solutions allow you to easily enable passwordless security for your websites and mobile apps. We currently provide fingerprint based authentication and PIN based authentication. Other forms of authentication are on the near term roadmap.

Fingerprint based authentication
Authentication for your Mobile Apps

ThumbSignIn Captcha solutions provide more effective defense for your website against bots than typical captcha solutions. Our unique approach makes use of the users' possession of mobile phones to verify that they are human. The captcha challenge is easy to respond to for a human user and does not require the user to install a mobile app.

SMS code based captcha