Security & Privacy
Best API Authentication Platforms in 2026
- 01
FusionAuth It suits teams managing end-user identity at scale that need authentication and authorization across applications.
From $162/mo Free plan Web · Windows · macOS · Linux9.0 Visit Specs - 02 Clerk
Clerk suits application teams seeking authentication and user management with prebuilt components, APIs, and organization support.
From $1.67/mo Free plan Web · iOS · Android · API8.6 Visit Specs - 03
Descope Descope suits developers building customer or business applications that need authentication, user management and authorization.
From $249/mo Free plan Web · iOS · Android · API8.5 Visit Specs - 04
Curity Identity Server Community is described as suitable for individuals or start-ups; Standard is for growing teams, and Enterprise for organizations with multiple teams or large deployments.
Free plan Web · macOS · Linux · API8.2 Visit Specs - 05
Frontegg Frontegg suits developers and product teams adding customer identity to applications, particularly B2B products with tenant-level policies.
Free plan Web · iOS · Android · API8.1 Visit Specs - 06
Keycloak Free plan Web · Windows · Linux · API7.7 Visit Specs - 07
Okta Customer Identity Cloud Auth0 suits organizations that need authentication and access controls for applications, including single sign-on, passwordless options, or machine-to-machine access.
From $35/mo Web · Windows · macOS · iOS7.7 Visit Specs - 08
Amazon Cognito Web · iOS · Android · API7.6 Visit Specs - 09
LoginRadius Free trial Web · iOS · Android · API7.6 Visit Specs - 10 Auth0Okta, Inc. From $35/mo Free plan Web · API7.4 Visit Specs
- 11 Stytch
Stytch suits developers building applications that need authentication, organization access controls, fraud protection or identity services for integrations.
Free plan Web · iOS · Android · API7.4 Visit Specs - 12 PingOne From $3/mo Web6.0 Visit Specs