List of free passwordless-authentication stuff for developerππ½
If you're looking for all programming tools around passwordless-authentication (not just free). Check this page List of passwordless-authentication Programming Tools

Magic
Fast, secure passwordless login for your app or website. One SDK for email magic links, social login, WebAuthn, and more. Free to get started, ready in minutes.
Tag: authentication, passwordless-authentication
1,000 free monthly active users 100 free text messages per month Access to all login methods Access to all 20 blockchains Custom logo and theme Magic Login Form and User Settings
MojoAuth
Quickly integrate passwordless authentication for web and mobile applications to give users a smooth, secure login experience.
Tag: authentication, passwordless-authentication
Unlimited Monthly Active Users Unlimited Total Users Unlimited Monthly Logins 2 RPS Authentication Request Email Support (Basic: 48 hours response time) Live Chat Support