Passwordless authentication,
built as infrastructure
Seamless Auth gives you passkeys, magic links, and OTP as a managed service we run and scale for you. It's also open source, so you can read every line and self-host the core whenever you want.
14-day trial, no credit card. See plans.
Or spin up the full stack locally in one command:
npx seamless-cli init my-appFully managed, or self-host the open-source core — your call.