Duende IdentityServer vs FusionAuth
Duende IdentityServer
duendesoftware.com
FusionAuth
fusionauth.ioSide by side
| Figure | Duende IdentityServer | FusionAuth |
|---|---|---|
| Price from | $479.17/mo | $162/mo |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 8 |
| Spec score · OAuth Server Software | 8.3 (#12) | 9.1 (#2) |
| Customization | The framework is designed to be extended and customized, including authentication flows and business logic. | Pages and messages can be customized, while lambdas alter validation, MFA challenge and token transformation behavior and webhooks react to events. |
| Standards | The product implements standards and specifications including SAML, OAuth 2.0, and OpenID Connect. | It implements OAuth 2.0, OpenID Connect and SAML v2, acting as both a service provider and SAML identity provider. |
| Support | 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. | Community support is provided through forums, Slack, and GitHub; Essentials includes email support with a 24 to 48 hour business-hours response time, and Enterprise includes 24/7 email and phone support. |
Plans
Duende IdentityServer
- Lite$5,750 a year
- Standard$12,500 a year
- Advanced$24,900 a year
- CustomPrice not published
FusionAuth
- CommunityFree
- CommunityFree
- Starter$162 a month
- Starter$162 a month
- Enterprise$2,970 a month
- Enterprise$2,970 a month
- Essentials$2,970 a month
- Essentials$2,970 a month
In their own words
Duende IdentityServer
Duende IdentityServer has no write-up on Specifiction yet; its figures are above.
FusionAuth
FusionAuth is a Customer Identity and Access Management server for authentication, authorization, and user management. It supports username and password login, passkeys, one-time passwords, and external identity providers, including Apple, Facebook, Google, and Twitter. It implements OAuth 2.0, OpenID Connect, and SAML v2. Authorization includes role-based access across users, roles, groups, applications, and entities, plus fine-grained authorization integration. Teams can customize pages and messages and use lambda functions and webhooks. It can run locally, on-premises, in private or air-gapped cloud environments, or as a managed FusionAuth Cloud instance. The free Community Edition is self-hosted and unlimited, with no trial clock. Starter costs $162 a month billed annually and includes one connector and 100 machine-to-machine entities; Essentials and Enterprise cost $2,970 a month billed annually. FusionAuth supports Android, iOS, Linux, macOS, Windows, web, and API deployments.