OpenIddict
OpenIddict: A flexible .NET framework for building self-hosted OAuth and OIDC services. Ranked #5 of 33 in OAuth Server Software by our editors (8.9/10); pricing: Free plan; best for .NET OAuth and OIDC implementations.
At a glance
- Editor score8.9 / 10
- PricingFree plan
- Best for.NET OAuth and OIDC implementations
- Free planYes
- Paid fromFree
- OpenID ConnectYes
- Founded2015
- Facts checked22 Sep 2026
Where it wins
- Separate client, server, and token-validation stacks
- Supports ASP.NET, ASP.NET Core, desktop, and mobile applications
- Includes introspection, revocation, mTLS, and database integrations
Where it doesn't
- Requires application code instead of providing a turnkey hosted service
- SAML is handled through a commercial component, not the core feature set
- Dedicated support depends on a custom support contract
Our verdict on OpenIddict
OpenIddict is a free, open-source .NET framework for building OAuth 2.0 and OpenID Connect clients, authorization servers, and token-validation services. Its independent client, server, and validation stacks can be used together or separately, making it suitable for developers implementing identity protocols in self-hosted applications. The server stack supports ASP.NET Core and legacy ASP.NET applications, while the client stack also supports desktop and mobile applications across web, Windows, macOS, Linux, iOS, and Android environments.
Its main strength is protocol and deployment coverage. OpenIddict includes authorization-server and client stacks, API token validation, client-credentials grants, token introspection, reference access and refresh tokens, revocation, proof-of-key and client assertion authentication, and mutual TLS client authentication and token binding. The ecosystem connects with ASP.NET, ASP.NET Core, Entity Framework 6, Entity Framework Core, MongoDB, Quartz.NET, and more than 100 OAuth and OpenID Connect web providers. Entity Framework, Entity Framework Core, and MongoDB integrations also give teams several persistence options.
OpenIddict is a better fit for teams that want control over identity implementation, storage, and deployment than for organizations seeking a managed identity service. Operating it requires application code and a self-hosted deployment model, so implementation responsibility remains with the development team. SAML is not a native core feature; it is documented through the commercial OpenIddict.SAML2P component from Rock Solid Knowledge. Teams that need a turnkey hosted service, native core SAML, or standard dedicated support should consider an alternative. Teams building customized .NET OAuth and OIDC infrastructure should find its broad protocol coverage more relevant.
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OpenIddict pricing
OpenIddict fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| OpenID Connect | Yes |
| SAML support | Yes |
| Self-hosting | Yes |
| Token introspection | Yes |
| Machine-to-machine auth | Yes |
| Deployment model | Self_hosted |
| Deployment | Self-hosted |
| Platforms | Web, Windows, macOS, Linux, iOS, Android |
| Support | Email, Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 100+ integrations: ASP.NET, ASP.NET Core, Entity Framework 6, Entity Framework Core, MongoDB, Quartz.NET … See all → |
| Pricing | Free plan |
| Website | openiddict.com |
| Facts checked | 22 Sep 2026 |
OpenIddict integrations
OpenIddict lists 100+ integrations on its own site — the 7 named here are the ones its pages call out.
- ASP.NET
- ASP.NET Core
- Entity Framework 6
- Entity Framework Core
- MongoDB
- Quartz.NET
- 100+ OAuth/OpenID Connect web providers
See all OpenIddict integrations →
Alternatives to OpenIddict
- KeycloakA broad, self-hosted IAM server for standards-based authentication and authorization.9.4
- authentikA broad, self-hosted identity stack for teams that need open-source control.9.2
- WSO2 Identity ServerA broad self-hosted IAM platform for enterprise OAuth, OIDC, SAML, and provisioning needs.9.1
See all OpenIddict alternatives →
OpenIddict vs the competition
- OpenIddict vs Keycloak
- OpenIddict vs authentik
- OpenIddict vs WSO2 Identity Server
- OpenIddict vs Apereo CAS
- OpenIddict vs Ory
- OpenIddict vs Amazon Cognito
Compare OpenIddict with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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