Cairn Identity
Identity is the auth layer every internal tool eventually needs — single sign-on, SCIM provisioning, access control. Cairn Identity is the SSO and user-management backbone you own, so your login system isn't a per-user line item that grows forever.
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A complete app, yours to keep.
Every Cairn Trail ships as a complete, AI-native application — full source in your own repository, a native MCP server, and a first-class CLI. Here’s what Cairn Identity includes out of the box.
- Single sign-on via OIDC and SAML
- SCIM user and group provisioning
- Role- and policy-based access control
- Multi-factor authentication
- Audit logs over your own data
- Native MCP server and CLI for identity ops
Every way to get identity & sso.
We’d rather you saw the whole map than a sales pitch. Here are the tools teams actually evaluate — what each is good at, said plainly. Cairn is one option among them.
Commercial
Hosted, polished, rented — your data lives on their cloud.Open source
Self-hostable and yours to run — read each license closely.So why Cairn?
Okta and Auth0 are the safe enterprise default — and identity is the worst thing to rent, because pricing scales with every user you add and migrating off is brutal. The open-source IdPs (Keycloak, Zitadel, Authentik) are excellent but heavy to operate. Cairn Identity aims for the readable middle: the protocols and provisioning most teams actually need, as code you own and can maintain — no per-user meter on your own front door.
However you get there, Cairn Identity is software you own — full source in your GitHub repository, running in your own cloud. No phone-home, no license server, no kill switch. Export your data any time; Cairn could disappear tomorrow and your software would keep working.