Seamless is the identity and access platform you run yourself. Passkeys first, phishing-resistant by default, and Apache-2.0 with no enterprise edition. Today it signs people in to your apps. We're building it in the open until it covers everything teams rent Auth0, Okta, Duo and 1Password for.
$ npx seamless-cli init my-appOne platform, four jobs
Identity is the front door to everything you build, and most teams rent it. The bill grows with every user. Single sign-on and SCIM sit behind enterprise tiers. Leaving means a migration nobody wants to run, so nobody leaves.
We think that's backwards. So we're building Seamless: open source, passwordless from the first line, and small enough to run on one modest server. Every security feature stays in the open project, forever. If it saves you money, time, or a breach, it did its job.
We only say Seamless does what another tool does once that feature ships. Anything with a version number is on the roadmap, not in your hands yet.
Sign people in to your apps.
Run the directory for your whole workforce.
Put strong auth in front of everything else.
Keep your team's passwords and keys safe.
Phishing-resistant by default, with nothing to tune.
Never lock anyone out, never lock anyone in.
Working sign-in in an afternoon, in the stack you already use.
Seamless is Apache-2.0. Single sign-on, SCIM, MFA, organizations and every security feature live in the open source project, now and later. If we ever offer managed hosting, it will sell hosting and support, never features. Self-hosters are never second class.
Read the license on GitHub →Add passkeys to a side project without a monthly bill or a sales call.
Own your users from day one. Nobody charges you per sign-in.
Answer the security questionnaire with phishing-resistant MFA and an audit log you can export.
Workforce identity and access are on the roadmap. Follow along, test early, and tell us what you need.
RoxTarget is our app for Hyrox athletes and coaches. It signs real people in with Seamless on iOS and the web, so we find the rough edges before you do.
Read the case studyEvery issue, milestone and pull request is public. Found a bug? Tell us, and you'll hear back from the person who wrote the code. Want to help? Pick up a good first issue, or bring the feature you need.
One command scaffolds a web app, an API and a Seamless Auth server, already wired together. Free, open source, and yours to keep.
$ npx seamless-cli init my-app