18.5
Authgear is an identity-as-a-service platform for authentication and user management in web and mobile applications.
Free planOpen sourceAndroidiOSWeb
Best OAuth Server Software in 2026
OAuth server software supports sign-in and authorization flows built around OAuth, OpenID Connect and related standards. Use the chart to compare protocol support, token introspection and machine-to-machine authentication. If phone access matters, check for an Android app and confirm its supported features. Platform options in this category include web, API, self-hosted, Linux, Android and iOS deployments.
28.4
Ory provides identity and access management for customer apps, business partners, machines, and AI agents.
Free planOpen sourceWebAPILinux
38.3
FusionAuth is a Customer Identity and Access Management server for authentication, authorization, and user management.
Free planAndroidiOSWeb
- 4
Google Cloud Identity
Google Cloud Identity centrally manages users and groups as a cloud identity service.
Free planAndroidiOSWebAPI8.3Free plan - 5
Okta Customer Identity Cloud
Okta Customer Identity Cloud, also known as Auth0, helps organizations provide secure access to applications for users.
Free planAndroidiOSWebAPI7.7From $35 a month - 6
Descope
Descope is a customer and agentic identity platform for authentication, user management, authorization, and identity journeys.
Free planAndroidiOSWebAPI7.6From $249 a month - 7
Microsoft Defender for Business
AndroidiOSAPImacOS7.5 - 8
Logto
Logto provides identity and access management for modern apps and SaaS products, covering authentication and authorization.
Free planAndroidiOSWebAPI7.4From $24 a month - 9
Auth0 Guardian
Auth0 Guardian is a mobile app for completing multi-factor authentication on iOS and Android.
Free planAndroidiOS7.3From $35 a month - 10
IBM Verify
AndroidiOSWebAPI7.3From $15,899.29 a year - 11
Kinde
Kinde is a cloud platform that combines authentication, access management, subscription billing, and feature management for SaaS products.
Free planAndroidiOSWebAPI7.3From $25 a month - 12
authentik
authentik is an open-source, self-hostable identity and access management product for organizations managing workforce and customer access.
Free planWebAPILinuxmacOS7.2From $5 a month - 13
Asgardeo
Free planAndroidiOSWebAPI7.1From $25 a month - 14
Frontegg
Frontegg provides customer identity and access management for customer-facing applications.
Free planAndroidiOSWebAPI7.1Free plan - 15
Abblix OIDC Server
Free planWebAPILinuxSelf-hosted7.0From $3,000 a year - 16
Duende IdentityServer
AndroidiOSWebAPI7.0From $5,750 a year - 17
Stytch
Stytch is an identity platform for applications used by people and AI agents, bringing authentication, authorization, and security tools together.
Free planAndroidiOSWebAPI7.0Free plan - 18
ZITADEL
ZITADEL provides identity and access management for customers, employees, devices, and services.
Free planWebAPILinuxmacOS7.0From $100 a month - 19
Apereo CAS
Free planWebAPILinuxSelf-hosted6.7Free plan - 20
Curity Identity Server
Curity Identity Server secures access for users, APIs, machines, and AI agents through a standards-based platform.
Free planWebAPILinuxmacOS6.7Free plan - 21
OpenIddict
Free planAndroidiOSWebAPI6.7Free plan - 22
Keycloak
Keycloak is open-source identity and access management software that adds authentication to applications and secure services, leaving those systems…
Free planWebAPILinuxSelf-hosted6.5Free plan - 23
Casdoor
AndroidiOSWebAPI6.4 - 24
Amazon Cognito
Amazon Cognito provides sign-up, sign-in, access control, and brokered AWS service access for web and mobile applications.
AndroidiOSWebAPI6.2 - 25
Authelia
Authelia is an open-source authentication and authorization server and portal that adds multi-factor authentication and single sign-on to applications.
Free planWebAPILinuxSelf-hosted6.2Free plan
Choosing well
Check Android access
Android is represented among the platforms in this category. Confirm whether the product you are considering has an Android app, web interface or API that fits your phone workflow.
Also check iOS availability when your team uses more than one mobile platform.
Compare protocol support
Check support for OpenID Connect and SAML when choosing an identity service. Token introspection can matter when applications need to examine token status.
For service-to-service workloads, compare machine-to-machine authentication support.
Choose a deployment model
Deployment options include hosted web services, APIs, self-hosted software and Linux installations. Match the model to where you plan to run the identity service.
Self-hosting can be relevant when you need to manage the deployment yourself; review the product's stated platform support before deciding.
Review free and paid plans
A free plan is available from products in this category, and trial offers are available from products as well. Compare what the free plan covers with the paid-from price shown in the chart.
If you need code access or want to change the software, check whether the project is open source and read its licence.
Questions people ask
Do OAuth server products support Android?
Android is one platform represented in this category. Check the individual product page to confirm whether it provides an Android app and what that app supports.
Can I start with a free plan?
Yes. Products in this category offer free plans, and trial periods are also available from products. Check the listing for plan limits and paid-from pricing.
What protocols should I compare?
Compare OpenID Connect and SAML support. Token introspection and machine-to-machine authentication are additional fields shown in the chart.
Can I host an OAuth server myself?
Self-hosted and Linux deployment options are represented in this category. Check the product's deployment model and platform details before setup.
Is open-source OAuth server software available?
Open-source projects are represented in this category. Review the project's licence and documentation before adopting or modifying the code.