user account concept as a vector illustration

One-click login for instant customers

Increase conversion with fast and secure passwordless authentication

Get started Try demo

Seamless sign-up

Stop losing users with your clumsy forms. A trusted device can sign in with a single click.

Secure by design

Stop phishing and fraud by eliminating the password. Email-based recovery included.

Quick integration

Easily add signup and login to your website or app. Get started in 5 minutes with our docs.

Reconnect with your long lost users

64% of signups are abandoned. Kno helps user conversion, engagement and retention.

screenshot of confirm sign in with Kno on an iphone

Web based, one click access

With one click access your users can sign-in instantly. No app required.

Users already on Kno can create an account with a single click. Reducing friction, and improving conversion.

Try it yourself at

online security concept as a vector illustration

Privacy by default

Anonymous personas are automatically generated for each user, for each application.

Applications can choose to rely on only anonymous data, dramatically simplifying data protection requirements.

HTML code sample showing using Kno

Quick development

Get set up in just 10 minutes using our drop-in client integration.

Kno was made with developer productivity in mind.

Getting started guide

social growth as a vector illustration

Grow with us

We are always refining. Use Kno and depend upon a robust modern authentication flow.

Let us manage the nitty gritty so you never have to.

screenshot of new sign in using magic link or QR code on iphone

New user or new device?

No trouble, we can offer the right fallback process.

Kno offers an email flow fallback using magic links. Or use the QR scan for secure authentication via an existing device.

access server computing as a vector illustration

Enhanced device security

Kno verifies the digital signature of each device. Use our trusted devices API to:

  • Protect internal tools from phishing by linking workstations and personal devices.
  • Approve customer devices against your own additional security checks.

Enterprise tier - Get in touch



0 Per month
  • 100 users
  • For small projects
  • Forever free
  • Kno branding


29 Per month
  • 1,000 users
  • One-click sign in
  • Instant account creation
  • Email backup auth


119 Per month
  • 10,000 users
  • 10 sites
  • Custom branding
  • Action confirmation

Get in touch

We run this community to discuss all topics relating to our passwordless future.

Want to talk to us directly? We're always pleased to get your email.