The Best OAuth Server Software in 2026
We researched OAuth server software through official vendor websites, including pricing pages, plan tables, and product documentation. Products are ranked on their core ability to issue and validate OAuth or OpenID Connect tokens, value for money, and verified features for application and API identity.
Our top picks
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Top ranked
Keycloak#1 of 339.4/10A broad, self-hosted IAM server for standards-based authentication and authorization.
Open source
-
Runner-up
authentik#2 of 339.2/10A broad, self-hosted identity stack for teams that need open-source control.
Free plan
-
Top-ranked free plan
WSO2 Identity Server#3 of 339.1/10A broad self-hosted IAM platform for enterprise OAuth, OIDC, SAML, and provisioning needs.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 33 tools, best first
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Best forBroad self-hosted identity deployments
A broad, self-hosted IAM server for standards-based authentication and authorization.
9.4/10★★★★★Visit Keycloak -
Best forFeature-rich open-source identity teams
A broad, self-hosted identity stack for teams that need open-source control.
9.2/10★★★★★Visit authentik -
Best forEnterprise self-hosted IAM
A broad self-hosted IAM platform for enterprise OAuth, OIDC, SAML, and provisioning needs.
9.1/10★★★★★Visit WSO2 -
Best forAuditable open-source SSO infrastructure
A broad, auditable SSO foundation for teams prepared to run identity infrastructure.
- SAML support
- Self-hosting
- Token introspection
9.0/10★★★★☆Visit Apereo CAS -
Best for.NET OAuth and OIDC implementations
A flexible .NET framework for building self-hosted OAuth and OIDC services.
- SAML support
- Self-hosting
- Token introspection
8.9/10★★★★☆Visit OpenIddict -
Best forManaged or self-hosted identity platforms
A flexible OAuth and identity stack for teams choosing cloud, self-hosting, or both.
8.8/10★★★★☆Visit Ory -
Best forAWS-centric application authentication
A usage-based AWS identity service with OAuth, federation, MFA, and temporary AWS credentials.
8.7/10★★★★☆Visit Amazon Cognito -
Best forFree self-hosted OAuth deployments
A free, self-hosted OAuth and identity platform with broad protocol support.
- SAML support
- Self-hosting
- Token introspection
8.6/10★★★★☆Visit Casdoor -
Best forLightweight Kubernetes OIDC federation
A focused, open-source OIDC and OAuth layer for Kubernetes federation.
- SAML support
- Self-hosting
- Token introspection
8.5/10★★★★☆Visit Dex -
Best forStandards-focused Node.js authorization servers
A configurable Node.js authorization server library for standards-focused teams.
- Self-hosting
- Token introspection
- Machine-to-machine auth
8.4/10★★★★☆Visit oidc-provider -
Best forSelf-hosted OAuth/OIDC with operational APIs
A self-hosted identity server with broad protocol support and operational APIs.
- SAML support
- Self-hosting
- Token introspection
8.3/10★★★★☆Visit Janssen Server -
Best forSelf-hosted reverse-proxy access control
A focused, self-hosted access layer for reverse-proxy environments.
8.2/10★★★★☆Visit Authelia -
Best forAdaptive open-source SSO gateways
A flexible self-hosted SSO gateway with broad protocols, adaptive access, and strong MFA coverage.
8.1/10★★★★☆Visit LemonLDAP::NG -
Best forTraditional self-hosted federation deployments
A broad, self-hosted federation server for organizations managing identity in-house.
- SAML support
- Self-hosting
- Token introspection
8.0/10★★★★☆Visit OpenAM -
Best forDeveloper-friendly hosted authentication
Developer-friendly hosted and self-hosted authentication with broad identity features.
7.9/10★★★★☆Visit Logto -
Best forMulti-tenant identity with provisioning
A flexible OAuth and multi-tenant identity platform with cloud and self-hosted options.
7.8/10★★★★☆Visit ZITADEL -
Best forGoogle-centered workforce identity
A Google-centered identity suite with free and Premium plans, SSO, MFA, and provisioning.
7.7/10★★★★☆Visit Google Cloud -
Best forCommercial identity with self-hosted entry
A capable OAuth server with a strong free self-hosted entry point.
7.6/10★★★★☆Visit FusionAuth -
Best forB2B identity with a free hosted tier
A flexible OAuth and identity platform with a substantial free hosted tier.
- SAML support
- Self-hosting
- Token introspection
7.5/10★★★★☆Visit Asgardeo -
Best forEmbedded B2B SaaS identity
Embedded B2B SaaS identity with enterprise SSO, SCIM, MFA, and multi-tenancy.
7.4/10★★★★☆Visit Frontegg -
Best forOrganizations needing embedded authentication
A developer-focused identity platform with broad embedded auth and a free starting tier.
7.3/10★★★★☆Visit Stytch -
Best forSupported commercial OAuth deployments
A standards-focused OAuth and identity server for supported commercial deployments.
- SAML support
- Self-hosting
- Token introspection
7.2/10★★★★☆Visit Curity -
Best forHosted and self-managed app authentication
A flexible identity platform for web, mobile, customer, B2B, and workforce access.
7.1/10★★★★☆Visit Authgear -
Best forSaaS teams needing identity plus billing
A cloud OAuth platform combining authentication, billing, organizations, and access controls.
7.0/10★★★★☆Visit Kinde -
Best forASP.NET OIDC implementations
A feature-rich self-hosted OIDC server for ASP.NET Core teams.
- Self-hosting
- Token introspection
- Machine-to-machine auth
6.9/10★★★☆☆Visit Abblix -
Best forCommercial .NET identity infrastructure
A broad OAuth, OIDC, and SAML toolkit for commercial .NET teams.
- SAML support
- Self-hosting
- Token introspection
6.8/10★★★☆☆Visit Duende -
Best forEnterprise workforce identity at a low entry price
Broad workforce IAM with OAuth 2.0, OpenID Connect, SSO, MFA, and provisioning.
6.7/10★★★☆☆Visit PingOne -
Best forLarge-scale customer identity programs
A broad customer identity platform for large-scale authentication programs.
- OpenID Connect
6.6/10★★★☆☆Visit Okta -
Best forPaid, supported self-hosted federation
A broad, self-hosted OAuth and federation suite for organizations that need vendor support.
- SAML support
- Self-hosting
- Token introspection
6.5/10★★★☆☆Visit Gluu Flex -
Best forEnterprise MFA and access management
A broad enterprise IAM platform with strong MFA and access controls, but sales-led pricing.
6.4/10★★★☆☆Visit IBM Verify -
Best forEndpoint security for SMBs
A capable endpoint security product, but not an OAuth server.
6.3/10★★★☆☆Visit Microsoft -
Best forMobile MFA approval workflows
A focused Auth0 companion for mobile MFA, not a standalone OAuth server.
6.2/10★★★☆☆Visit Auth0 -
Best forTeams building visual passwordless authentication flows
A visual CIAM platform for passwordless authentication, SSO, and adaptive access.
6.1/10★★★☆☆Visit Descope
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Score |
|---|---|---|---|---|
| 1 | Keycloak | Free | 9.4 | |
| 2 | authentik | Yes | $5/user/mo | 9.2 |
| 3 | WSO2 Identity Server | Yes | Free | 9.1 |
| 4 | Apereo CAS | Yes | Free | 9.0 |
| 5 | OpenIddict | Yes | Free | 8.9 |
| 6 | Ory | Yes | 8.8 | |
| 7 | Amazon Cognito | Yes | $0.0055/user/mo | 8.7 |
| 8 | Casdoor | Yes | Free | 8.6 |
| 9 | Dex | Free | 8.5 | |
| 10 | oidc-provider | Free | 8.4 | |
| 11 | Janssen Server | Free | 8.3 | |
| 12 | Authelia | Yes | Free | 8.2 |
| 13 | LemonLDAP::NG | Yes | Free | 8.1 |
| 14 | OpenAM | Yes | Free | 8.0 |
| 15 | Logto | Yes | $24/mo | 7.9 |
| 16 | ZITADEL | Yes | $100/mo | 7.8 |
| 17 | Google Cloud Identity | Yes | $6/user/mo | 7.7 |
| 18 | FusionAuth | Yes | $162/mo | 7.6 |
| 19 | Asgardeo | Yes | 7.5 | |
| 20 | Frontegg | Yes | 7.4 | |
| 21 | Stytch | Yes | 7.3 | |
| 22 | Curity Identity Server | Yes | 7.2 | |
| 23 | Authgear | Yes | $50/mo | 7.1 |
| 24 | Kinde | Yes | $25/mo | 7.0 |
| 25 | Abblix OIDC Server | Yes | $3,000/yr | 6.9 |
| 26 | Duende IdentityServer | Yes | $5,750/yr | 6.8 |
| 27 | PingOne | No | $3/user/mo | 6.7 |
| 28 | Okta Customer Identity Cloud | Yes | $3,000/mo | 6.6 |
| 29 | Gluu Flex | No | 6.5 | |
| 30 | IBM Verify | No | 6.4 | |
| 31 | Microsoft Defender for Business | No | $3/user/mo | 6.3 |
| 32 | Auth0 Guardian | Yes | $35/mo | 6.2 |
| 33 | Descope | Yes | $249/mo | 6.1 |
Head-to-head All 25 comparisons →
- Keycloak vs authentik
- Keycloak vs Apereo CAS
- Keycloak vs OpenIddict
- Keycloak vs Ory
- Keycloak vs Casdoor
- authentik vs WSO2 Identity Server
- authentik vs Apereo CAS
- authentik vs OpenIddict
- authentik vs Ory
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How we rank OAuth server software
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update