authentik vs Duende IdentityServer
authentik
goauthentik.ioDuende IdentityServer
duendesoftware.comSide by side
| Figure | authentik | Duende IdentityServer |
|---|---|---|
| Price from | $5/mo | $479.17/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 4 |
| Spec score · OAuth Server Software | 8.5 (#9) | 8.3 (#12) |
| Protocols | Listed protocols include OAuth2/OpenID Connect, SAML2, LDAP, RADIUS, SCIM, and Kerberos. | Core protocol support includes OpenID Connect and OAuth 2.0 with features such as Pushed Authorization Requests and Demonstration of Proof-of-Possession; extended support includes mTLS, JAR, CIBA, and Device Authorization Grant. |
| Support | The open-source plan lists community Discord and no support; paid support is offered as part of enterprise software subscriptions, with ticket support for Enterprise subscriptions over $1k. | Support is included with each license and varies by plan from community support to priority support and a premium tier with a named Technical Account Manager. |
Plans
authentik
- FreeFree
- Enterprise$5 a month
- Open SourceFree
- Enterprise Plus$20,000 a year
Duende IdentityServer
- Lite$5,750 a year
- Standard$12,500 a year
- Advanced$24,900 a year
- CustomPrice not published
In their own words
authentik
authentik is an open-source, self-hostable identity and access management product for workforce single sign-on, customer identity, zero-trust security, legacy application integration and API security. It supports OAuth2/OpenID Connect, SAML2, LDAP, RADIUS, SCIM and Kerberos, as well as WS-Federation. MFA options include TOTP, WebAuthn/passkeys, email, SMS, Duo and static tokens. Access policies can consider factors such as user attributes, time and location. Security features include audit logging, session binding, GeoIP and impossible-travel detection, and client certificate authentication with mTLS. It can run on customer infrastructure, including Docker and Kubernetes; the pricing FAQ says there is no hosted version currently. The authentik Agent integrates with Windows, macOS and Linux for local device login and CLI authentication. A free open-source plan includes community Discord support but no product support. Enterprise costs $5 a month, billed annually, at $5 per user per month; external users are $0.02 per month and service accounts have no cost.
Duende IdentityServer
Duende IdentityServer has no write-up on Specifiction yet; its figures are above.