Duende IdentityServer

duendesoftware.com · checked 3 Oct 2026

#12 · OAuth Server Software

Visit duendesoftware.com ↗ Alternatives Duende IdentityServer vs Curity Identity Server

How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on OAuth Server Software6.3#12 of 32

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.

Pricing

LiteBilled annually · 1 production deployment · 2 client IDs/connected apps · 2 BFF front-ends · unlimited APIs · 10,000 User Management users · community support$5,750/yr
StandardBilled 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$12,500/yr
AdvancedBilled 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$24,900/yr
CustomBilled annually · For enterprises needing unlimited scale and enhanced supportOn request

As duendesoftware.com lists them, checked 3 Oct 2026.

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Runs on

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Facts

Website: duendesoftware.com
Price: Free tier · from $5,750/yr
Free trial: Yes
Customization: The framework is designed to be extended and customized, including authentication flows and business logic.
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.
Founded: 2020
Key management: Automatic Key Management handles signing and validation key generation, rotation, propagation, and retirement.
Maker history: Duende Software describes itself as the commercial home for IdentityServer, established in 2020 to support production systems while retaining developer control.
SAML integration: The SAML add-on supports providing SAML SSO to downstream partners and accepting SAML assertions from upstream enterprise identity providers.
Standards: The product implements standards and specifications including SAML, OAuth 2.0, and OpenID Connect.
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.
Trial and development: A license is not required for development, testing, trial, or personal projects, and the product can be downloaded from NuGet.
User management: The first-party .NET User Management SDK includes user profiles, authentication, and lifecycle management, with passwords, MFA, and passkeys built in.

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