Identity / Auth / User Management Tools

Arctic — CI/CD for Applications tool for developers. Specializes in OAuth Library.

Aserto — Identity / Auth / User Management tool for developers. Specializes in Authorization.

Auth0 — Identity platform with SSO, MFA, social login, and enterprise federation supporting 30+ SDKs and 50+ integrations.

authentik — Identity / Auth / User Management tool for developers. Specializes in identity provider.

Authgear — Identity / Auth / User Management tool for developers. Specializes in authentication.

Authologic — Identity / Auth / User Management tool for developers. Specializes in identity orchestration.

Authsignal — Step-up authentication and fraud prevention API adding passkeys, TOTP, and risk-based MFA to existing auth flows.

AWS Cognito — Identity / Auth / User Management tool for developers. Specializes in authentication.

Better Auth — CI/CD for Applications tool for developers. Specializes in Authentication Library.

BoxyHQ — Identity / Auth / User Management tool for developers. Specializes in Enterprise SSO.

Casbin — CI/CD for Applications tool for developers. Specializes in Authorization Framework.

Cerbos — Open-source authorization service with human-readable YAML policies, RBAC/ABAC, and REST/gRPC evaluation endpoints.

Clerk — Drop-in authentication platform with prebuilt React components for sign-in, MFA, organization management, and SSO.

Bengo4.coms #1 Japanese e-signature service — API and webhooks for digital contract lifecycle automation.

Corbado — Identity / Auth / User Management tool for developers. Specializes in Passkey Authentication.

Descope — No-code authentication and user management platform with drag-and-drop flow builder for SSO, MFA, and social login.

MPC wallet-as-a-service API for institutions to create, embed, and manage programmable wallets.

Indian e-signature, KYC and document workflow APIs — Aadhaar e-sign, video KYC and paperless onboarding.

Dynamic — Web3 authentication SDK supporting wallet-based login, social auth, and embedded wallet creation for dApps.

FGA (Fine-Grained Authorization) — CI/CD for Applications tool for developers. Specializes in Authorization Service.

Self-custodial MPC wallet platform with DeFi support and treasury management API.

FusionAuth — Developer-focused CIAM platform with SSO, MFA, OAuth 2.0/OIDC, and advanced user management for self-hosted or cloud.

Goiabada — CI/CD for Applications tool for developers. Specializes in Authentication.

Hanko — Passkey-first authentication platform with open-source backend, WebAuthn support, and prebuilt React auth components.

HYPR — Passwordless authentication platform using FIDO2/WebAuthn for phishing-resistant employee and customer MFA.

Keto — CI/CD for Applications tool for developers. Specializes in Authorization.

Keycloak — Identity / Auth / User Management tool for developers. Specializes in authentication.

Keyless — Biometric authentication platform using multi-party computation to enable privacy-preserving facial recognition MFA.

Kinde — Modern authentication and user management platform with pre-built SSO, MFA, feature flags, and billing integration.

Ladon — CI/CD for Applications tool for developers. Specializes in Access Control.

LoginRadius — Identity / Auth / User Management tool for developers. Specializes in CIAM.

Logto — CI/CD for Applications tool for developers. Specializes in Identity Management.

Lucia — CI/CD for Applications tool for developers. Specializes in Authentication Library.

Magic Link — Identity / Auth / User Management tool for developers. Specializes in wallet auth.

MojoAuth — Passwordless authentication API providing magic links, email OTP, and WebAuthn passkey login with analytics.

Next-Auth (Auth.js) — CI/CD for Applications tool for developers. Specializes in Authentication Library.

Fukuoka-based collaboration software company behind Backlog, Cacoo and Typetalk with single-sign-on APIs.

Okta — Enterprise identity cloud with SSO, adaptive MFA, lifecycle management, and API access management for workforce and customers.

OLOID — AI-based physical and digital identity verification platform for frontline worker authentication using face and mobile.

OpenFGA — Identity / Auth / User Management tool for developers. Specializes in Fine Grained Authorization.

Ory — Identity / Auth / User Management tool for developers. Specializes in Identity Management.

Ory Keto — CI/CD for Applications tool for developers. Specializes in Permissions Service.

Oslo — CI/CD for Applications tool for developers. Specializes in Authentication Utilities.

Oso — Authorization library with Polar policy language for embedding RBAC, ABAC, and ReBAC rules directly in application code.

Passage by 1Password — Passkey authentication and user management API enabling FIDO2/WebAuthn-based passwordless login.

Passkeys.dev — W3C/FIDO community resource and implementation guides for WebAuthn passkey integration across platforms.

Passport.js — CI/CD for Applications tool for developers. Specializes in Authentication Middleware.

Permit.io — Full-stack authorization service with RBAC, ABAC, and ReBAC models, low-code policy editor, and audit logging.

Privy — Embedded wallet and authentication SDK for Web3 apps supporting social login, email, and multi-wallet connection.

PropelAuth — Identity / Auth / User Management tool for developers. Specializes in Authentication.

Rauthy — CI/CD for Applications tool for developers. Specializes in OpenID Connect SSO.

Onchain UX toolkit (formerly WalletConnect) with AppKit and WalletKit supporting 400+ wallets across EVM, Solana and Bitcoin.

Scalekit — Enterprise authentication SDK adding SAML SSO, SCIM directory sync, and social login to SaaS apps in hours.

Indian fintech infrastructure platform offering APIs for Aadhaar/PAN KYC, account aggregation, UPI, BBPS and e-sign.

SkyCloak — Identity / Auth / User Management tool for developers. Specializes in authentication.

SpiceDB — CI/CD for Applications tool for developers. Specializes in Authorization.

SSOJet — Enterprise SSO and SCIM provisioning API for adding SAML and OIDC-based SSO to multi-tenant SaaS products.

Stack Auth — Identity / Auth / User Management tool for developers. Specializes in Authentication.

Stytch — Authentication API with passkeys, magic links, OTPs, OAuth, and enterprise SSO in a single developer platform.

SuperTokens — Open-source authentication backend with session management, MFA, SSO, and self-hosted or managed deployment.

Wallet infrastructure and key management API using secure enclaves for crypto and fintech apps.

Unkey — Identity / Auth / User Management tool for developers. Specializes in API Key Management.

Userfront — Identity / Auth / User Management tool for developers. Specializes in Authentication.

Plug-and-play wallet SDK using MPC and social logins for passwordless onboarding across EVM, Solana and other chains.

WorkOS — Enterprise auth API adding SSO, SCIM, directory sync, and audit logs to SaaS apps with minimal integration effort.

ZITADEL — Open-source identity platform with OIDC, OAuth 2.0, SAML, passkeys, and multi-tenancy for cloud-native IAM.