IdentityServer
Reviving Free Open Source
Supported Platforms
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Open.IdentityServerOpen.IdentityServer
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ASP.NETASP.NET
Open.IdentityServer is a free-forever SDK. Continuing the development of the successful free open-source IdentityServer4 codebase. Maintained and developed by Rock Solid Knowledge, which has been developing IdentityServer-based solutions and products for over eight years.
- Free open source, full access to source code, all development done in clear view
- Standards based
- Create and customise your own .NET OAuth SSO solution
- Deploy anywhere
Open.IdentityServer 1.0.0 is not just a recompilation of IdentityServer4 for .NET 10; it includes new features and fixes for bugs and security vulnerabilities. See release notes here
What You Need To Know
Questions you, the community, have asked
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Why did we revive IdentityServer4?
Read our open letter, on our journey to becoming the new custodians of the future of the Open.IdentityServer
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What do we stand for, and why does it matter now?
Read the Manifesto for the project
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Where can I find the source code?
Explore the source code
Reviving the Open Source
Getting Started
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How do I get started with a new IdentityServer based on Open.IdentityServer?
See our quickstart documentation to get started.
Coming soon, a dotnet template
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How does Open.IdentityServer compare to Duende IdentityServer?
Read our feature matrix
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How do I migrate from Duende IdentityServer to Open.IdentityServer?
The migration process is very straightforward, Open.IdentityServer shares the same database schema as Duende, making the migration purely code-only.
- See the documentation on migrating from Duende
- Watch a video on performing the migration in less than 8 minutes
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How do I migrate from IdentityServer4 to Open.IdentityServer?
Upgrading is very straightforward; we have various resources to help
- See the Migration Docs
- Watch a short video
Migrate in minutes, not months
Switch from either Duende IdentityServer or IdentityServer4 to Open IdentityServer in as little as 10 minutes without changing your existing database or infrastructure.
Roadmap & Support
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What is our roadmap for Open.IdentityServer?
Read our developer Roadmap for Open IdentityServer.
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How do I get support?
We provide some level of free support and paid support if required. See the support section in our documentation to find the correct channel for you.
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Where can I download the prebuilt binaries?
Open.IdentityServer packages are available on NuGet
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Do you support other protocols like SAML and WS-FED?
Yes, we do, but they are licensed products. The license is a one-off fee; for subsequent years, there is an optional small update/support fee.
Open.IdentityServer is an independent open‑source project led by Rock Solid Knowledge, based on the Apache 2.0‑licensed IdentityServer4 codebase. It is not affiliated with or endorsed by Duende Software or the original IdentityServer4 authors.