18.3
FusionAuth is a Customer Identity and Access Management server for authentication, authorization, and user management.
Free planAndroidiOSWeb
Best API Authentication Platforms in 2026
API authentication platforms help software verify users and control access to APIs. They can support sign-in flows, tokens and access rules for services that connect apps and systems. Start by checking Android support if you manage access from a phone. Then compare web and API access, iOS support, self-hosting, Linux availability, pricing, trials and licence terms.
27.7
Okta Customer Identity Cloud, also known as Auth0, helps organizations provide secure access to applications for users.
Free planAndroidiOSWeb
37.6
Descope is a customer and agentic identity platform for authentication, user management, authorization, and identity journeys.
Free planAndroidiOSWeb
- 4
Clerk
Clerk provides full-stack authentication and user management for applications, including Organizations and Billing.
Free planAndroidiOSWebAPI7.5Free plan - 5
Frontegg
Frontegg provides customer identity and access management for customer-facing applications.
Free planAndroidiOSWebAPI7.1Free plan - 6
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 - 7
Curity Identity Server
Curity Identity Server secures access for users, APIs, machines, and AI agents through a standards-based platform.
Free planWebAPILinuxmacOS6.7Free plan - 8
LoginRadius
LoginRadius is a fully managed Customer Identity and Access Management service for authentication, authorization, and identity administration.
AndroidiOSWebAPI6.6 - 9
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 - 10
Amazon Cognito
Amazon Cognito provides sign-up, sign-in, access control, and brokered AWS service access for web and mobile applications.
AndroidiOSWebAPI6.2 - 116.1From $35 a month
- 12
PingOne
PingOne is a web-based identity and access service for workforce and customer applications.
Web5.7From $3 a month
Choosing well
Check phone and platform support
If you need to manage authentication from a phone, check for an Android app or Android coverage before choosing. iOS support may matter for teams using iPhone or iPad.
Compare the service's web, API, self-hosted and Linux options with the systems you need to connect.
Compare free plans and trials
A free plan can help you start without a subscription. Check what the plan includes and when paid pricing begins.
A free trial gives you time to assess a paid service before committing. Review the trial length and the price that follows it.
Choose a deployment model
Web and API access suit hosted workflows, while self-hosted and Linux options can fit teams that run their own infrastructure.
Check where the platform runs and how that matches your applications, servers and administration process.
Review licence terms
If you need to read or change the code, check the licence before choosing. Keycloak is listed as open source.
For hosted services, review the provider's plan terms and pricing alongside your deployment needs.
Questions people ask
Do these platforms support Android?
Android is one of the platforms represented in this category. Check the individual service for its Android app or Android coverage before choosing.
Are free plans available?
A free plan is offered by platforms in this category. Check the plan limits and the price of paid tiers.
Can I try a platform before paying?
Free trials are offered by platforms in this category. Trial lengths and post-trial pricing differ, so review the service terms.
Are API authentication platforms available for self-hosting?
Self-hosted deployment is represented in this category. Check whether the service you want supports self-hosting and Linux.
Is open-source software included?
Keycloak is listed as open source. Check the licence of any platform if code access or modification matters.