Developer Tools·Standings
OAuth Server Software: Compare Features and Pricing
OAuth server software helps apps handle sign-in and access permissions; the choice depends on the identity features you need and how you plan to run it. This board compares options for OpenID Connect, SAML, token introspection and machine-to-machine authentication.
Compare the free-plan and starting-price details with the deployment options, including self-hosting. The signal score is out of 10; API, open-source and free-tier marks show whether those attributes are listed for a tool.
- 32 platforms
- 2 with a public API on this page
- 23 with a free tier
- Checked 23 Sept 2026
- 1 O
Oryory.comOry provides identity and access management for customer apps, business partners, machines, and AI agents.
- 2 A
Authgearauthgear.comAn identity service for web and mobile apps with passkeys, MFA, and social sign-in.
- 3 GC
Google Cloud Identitycloud.google.comA cloud service for managing users and groups with federation, SSO, and MFA.
- 4 F
FusionAuthfusionauth.ioA customer identity server for authentication, authorization, and user management.
- 5 OC
Okta Customer Identity Cloudauth0.com - 6 O
OpenIddictopeniddict.comOpenIddict is a free and open source framework for building OAuth 2.0/OpenID Connect clients and servers in .NET.
- 7 C
Casdoorcasdoor.aiAn open-source sign-in platform supporting many identity providers and access control methods.
- 8 AC
Apereo CASapereo.github.ioAn open-source Java identity provider for web single sign-on and multiple login protocols.
- 9 AO
Abblix OIDC Serverabblix.comA .NET server library for building an OpenID provider with OAuth 2.0 and OpenID Connect.
- 10 F
Fronteggfrontegg.comA customer identity service with sign-in options, roles, permissions, and API access controls.
- 11 CI
Curity Identity Servercurity.ioAn identity platform for user, API, machine, and AI agent access and authentication.
- 12 DIDuende IdentityServerduendesoftware.com
An ASP.NET Core framework for customizing OAuth 2.0 and OpenID Connect sign-in.
- 13 A
authentikgoauthentik.ioAn open-source sign-in and access system for staff, customers, and APIs that you can run yourself.
- 14 IV
IBM Verifyibm.comA paid authenticator for generating temporary TOTP login codes on mobile devices.
- 15 MDMicrosoft Defender for Businessmicrosoft.com
Microsoft Defender for Business is an endpoint security solution for small and medium-sized businesses with up to 300 users that helps protect devices from…
- 16 AG
Auth0 Guardianauth0.comA mobile app that lets enrolled devices approve Auth0 logins or generate short-lived codes.
- 17 D
Descopedescope.comAn identity platform with a visual builder for login screens and authentication flows.
- 18 SStytchstytch.com
Stytch describes itself as an identity platform for humans and AI agents that combines authentication, authorization, and security.
- 19 JSJanssen Serverdocs.jans.io
An open-source identity platform with OAuth, OpenID Connect, MFA, and directory integration.
- 20 K
Keycloakkeycloak.orgAn open-source service for app sign-in, single sign-on, and external identity providers.
- 21 KKindekinde.com
Kinde combines authentication, access management, billing, and feature management for building, securing, and monetizing SaaS products.
- 22 LLogtologto.io
Logto is an identity and access management solution that provides authentication and authorization for modern apps and SaaS products.
- 23 OOpenAMopenidentityplatform.org
OpenAM provides authentication, single sign-on, authorization, federation, entitlements, and web services security.
- 24 ZZITADELzitadel.com
ZITADEL provides identity management, authentication, and access management for customers, employees, devices, and services.
- 25 AAsgardeowso2.com
An identity platform with SSO, MFA, social login, passkeys, and app development components.
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How to choose
Which identity features does it need?
Start with the sign-in and access features your apps require. Compare support for OpenID Connect and SAML, and check whether token introspection or machine-to-machine authentication is needed.
Where does it need to run?
Choose based on your deployment needs. The board covers web, API and self-hosted options, as well as Linux, Android and iOS platform marks; check a tool's own details for the fit you need.
How much does OAuth server software cost?
Compare the free-plan mark with the listed paid starting price, and note whether the price is per user or per month or year. A free trial is distinct from a free plan. For example, Abblix OIDC Server lists a free plan and paid pricing from $3,000 per year, while Apereo CAS is listed as free.
Does it need to be open source or have an API?
If you need to inspect or change the code, check the open-source mark and licence details. If another app needs to connect programmatically, check for a public API; the board marks API availability separately.
Questions
What does OAuth server software do?
It provides identity and access features for apps, such as OpenID Connect or SAML support. Compare the features and deployment model against your needs.
What should I compare when choosing an OAuth server?
Compare OpenID Connect, SAML, token introspection, machine-to-machine authentication, self-hosting, deployment model, free plan and starting price.
Can I self-host OAuth server software?
The board includes a self-hosting comparison. Check an individual tool's deployment details to confirm it fits your environment.
Is there free OAuth server software?
The board marks free plans and lists pricing notes. Apereo CAS, Authelia and Casdoor are listed as free; check their details for the terms that apply.
Does OAuth server software include an API?
The board marks public API availability. Check a tool's details to confirm the API supports the connection you need.
Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure