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Duende IdentityServer

duendesoftware.com

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Spec score 8.3 #12 of 32 in OAuth Server Software

Spec sheet

Purpose
Duende IdentityServer is an OpenID Connect and OAuth 2.0 framework for ASP.NET Core that centralizes authentication for APIs, SPAs, mobile apps, and microservices in your own environment.Read 3 Oct 2026 · duendesoftware.com
Audience
The Lite plan is described as intended for small teams shipping a focused product, while Standard targets growing teams managing multiple production applications.Read 3 Oct 2026 · duendesoftware.com
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.Read 3 Oct 2026 · duendesoftware.com
Founded
2020Read 28 Sep 2026 · duendesoftware.com
Customization
The framework is designed to be extended and customized, including authentication flows and business logic.Read 3 Oct 2026 · duendesoftware.com
Deployment limit
A deployment is one OpenID Connect/OAuth authority at one URL and may use multiple physical or virtual nodes for load balancing or failover; plan allowances range from one to up to unlimited deployments.Read 3 Oct 2026 · duendesoftware.com
Financial-grade security
The Financial-Grade Security & Conformance add-on checks IdentityServer configuration against FAPI 2.0 and OAuth 2.1 requirements and produces an audit-supporting report with remediation guidance.Read 3 Oct 2026 · duendesoftware.com
Key management
Automatic Key Management handles signing and validation key generation, rotation, propagation, and retirement.Read 3 Oct 2026 · duendesoftware.com
Maker history
Duende Software describes itself as the commercial home for IdentityServer, established in 2020 to support production systems while retaining developer control.Read 3 Oct 2026 · duendesoftware.com
Protocols
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.Read 3 Oct 2026 · duendesoftware.com
SAML integration
The SAML add-on supports providing SAML SSO to downstream partners and accepting SAML assertions from upstream enterprise identity providers.Read 3 Oct 2026 · duendesoftware.com
Standards
The product implements standards and specifications including SAML, OAuth 2.0, and OpenID Connect.Read 3 Oct 2026 · duendesoftware.com
Trial and development
A license is not required for development, testing, trial, or personal projects, and the product can be downloaded from NuGet.Read 3 Oct 2026 · duendesoftware.com
User management
The first-party .NET User Management SDK includes user profiles, authentication, and lifecycle management, with passwords, MFA, and passkeys built in.Read 3 Oct 2026 · duendesoftware.com

Plans and prices

Lite $5,750 a year Billed annually 1 production deployment · 2 client IDs/connected apps · 2 BFF front-ends · unlimited APIs · 10,000 User Management users · community support Read 3 Oct 2026 · duendesoftware.com
Standard $12,500 a year Billed annually 1 production deployment · 10 client IDs · 10 BFF front-ends · unlimited APIs · 100,000 User Management users · priority support: 2 support escalations per year Read 3 Oct 2026 · duendesoftware.com
Advanced $24,900 a year Billed annually 2 production deployments · 30 client IDs · 30 BFF front-ends · unlimited APIs · 500,000 User Management users · priority support: 2 business day SLA, 4 escalations per year Read 3 Oct 2026 · duendesoftware.com
Custom Price not published Billed annually For enterprises needing unlimited scale and enhanced support Read 3 Oct 2026 · duendesoftware.com

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