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Auth0 Review
Auth0 is an identity management platform that enables secure authentication and authorization for applications, users, and AI agents.
1Auth0 for AI Agents became generally available in November 2025, winning the 'Most Innovative AI-Infrastructure Security Solution, 2026' award.
2The Authentication API generally supports 100 requests per second (RPS) for production tenants, with Public Performance Burst modifiers allowing up to 400 RPS for 48 hours monthly.
3The Free plan includes 25,000 Monthly Active Users (MAUs) and 1,000 Machine-to-Machine (M2M) tokens per month, with the MAU limit increased in September 2024.
4Auth0 B2B plans were upgraded in February 2026 to include free self-service Single Sign-On (SSO) and System for Cross-domain Identity Management (SCIM).
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Auth0 at a Glance
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overview
What is Auth0?
Auth0 is an identity management platform tool developed by Auth0 (company) that enables developers and organizations to implement secure authentication and authorization for applications, users, and AI agents. It provides a flexible, drop-in solution to add secure login, identity management, and access control to applications without building these systems from scratch. Auth0, now part of Okta's Customer Identity Cloud, acts as an intermediary between applications and identity providers, handling authentication, issuing tokens, enforcing security policies, and managing user identities. The platform supports various client types including web applications, mobile applications, APIs, single-page applications (SPAs), and machine-to-machine communication.
quick facts
Quick Facts
| Attribute | Value |
|---|---|
| Developer | Auth0 (company) |
| Business Model | Freemium / Hybrid (MAU-based, M2M tokens) |
| Pricing | Free plan, Paid plans starting at $35/month (for 500 MAUs, B2C Essentials) |
| Platforms | Web, Mobile, API |
| API Available | Yes |
| Integrations | Google, Facebook, Apple, GitHub, Microsoft, Active Directory, LDAP, SAML-based providers, Spring Boot, Telesign SMS Messaging API |
features
Key Features of Auth0
Auth0 provides a comprehensive suite of features designed to streamline identity management and enhance security across various application types and user bases. These capabilities are built upon a robust infrastructure that supports modern authentication standards and compliance requirements.
- 1User Authentication and Authorization: Supports login with identifiers (username, email, phone number) and passwords, social accounts (e.g., Google, Facebook, Apple, GitHub, Microsoft), and custom user profiles.
- 2API Security: Secures APIs using the OAuth 2.0 framework, ensuring controlled access and data protection.
- 3Single Sign-On (SSO): Enables users to authenticate once and gain access to multiple applications without repeated logins, suitable for SaaS platforms and enterprise environments.
- 4Multi-Factor Authentication (MFA): Offers various MFA methods including Time-based One-Time Passwords (TOTP), SMS/email verification, push notifications, and biometrics to strengthen security.
- 5Passwordless Authentication: Provides methods such as magic links via email, one-time codes via SMS, and biometric authentication to improve user experience and mitigate password-related risks.
- 6Enterprise Directory Federation: Allows integration with existing enterprise directory services (e.g., Active Directory, LDAP, SAML-based providers) for employee login using established credentials.
- 7User Management: Includes tools for password resets, user creation, provisioning, blocking, deletion, and management of user interfaces.
- 8Compliance: Assists organizations in meeting regulatory requirements such as SOC2, GDPR, PCI DSS, and HIPAA through secure identity practices.
- 9Monitoring and Analytics: Delivers detailed logs of authentication events (logins, failures, password changes) and metrics on user activity for auditing and operational insights.
- 10Auth0 for AI Agents: Provides authentication and authorization infrastructure specifically designed for AI agents, with Cross App Access for AI agents slated for general availability in 2026.
use cases
Who Should Use Auth0?
Auth0 is designed for a broad range of users and organizations seeking to implement secure, scalable, and compliant identity management solutions without the overhead of building and maintaining such systems in-house. Its flexibility supports various application architectures and business needs.
- 1Developers building web, mobile, or API-driven applications who require secure and flexible identity management without extensive custom development.
- 2Organizations needing to implement Single Sign-On (SSO) across multiple applications for both human users and machine-to-machine communication.
- 3Enterprises requiring robust Multi-Factor Authentication (MFA), enterprise directory federation, and adherence to compliance standards (e.g., GDPR, HIPAA) for their identity solutions.
- 4Companies integrating AI agents into their workflows, requiring secure authentication and authorization for non-human identities and automated processes.
- 5SaaS platforms and enterprise dashboards seeking simplified user management, access control, and a customizable login experience for their customer base.
pricing
Auth0 Pricing & Plans
Auth0 operates on a freemium model with various paid tiers based primarily on Monthly Active Users (MAUs) and Machine-to-Machine (M2M) tokens. Pricing adjustments occurred in late 2023 and September 2024, reflecting changes in MAU limits and overage costs. Auth0 APIs are subject to rate limiting, which varies by API, tenant type, and subscription level, utilizing a token bucket algorithm.
- 1Free plan: Includes 25,000 Monthly Active Users (MAUs) and 1,000 M2M tokens per month. The MAU limit was increased from 7,500 in September 2024.
- 2Essentials plan (B2C): A paid tier that includes 1,000 M2M tokens per month. In late 2023, the overage cost per MAU increased from $0.023 to $0.07, and the base plan was adjusted to 500 MAUs for $35/month.
- 3Professional plan (B2C): A paid tier that includes 5,000 M2M tokens per month, with options for expansion via add-ons.
- 4Enterprise plans: Paid plans that include 'Enterprise Rate Limits' for APIs. As of February 2026, these plans received upgrades including free self-service SSO and SCIM. Tokens issued for Auth0's own APIs (Management API, Authentication API) do not count towards the M2M token quota.
competitors
Auth0 vs Competitors
Auth0 operates within a competitive landscape of identity and access management (IAM) solutions, each offering distinct approaches to authentication and authorization for human users and AI agents.
1
Okta for AI Agents↗
Okta for AI Agents focuses on bringing every AI agent into an identity security fabric for comprehensive visibility, management, and governance at enterprise scale.
Okta for AI Agents provides a dedicated framework for securing non-human identities, offering automated discovery, lifecycle management, and governance, which is a more explicit and enterprise-focused approach to AI agent identity compared to Auth0's broader platform.
2
SuperTokens↗
SuperTokens offers an open-source, developer-first authentication solution with a specific MCP Toolkit to integrate authentication directly into LLM tools and manage auth via natural language.
Unlike Auth0's broader CIAM focus, SuperTokens emphasizes self-hosting, open-source flexibility, and direct integration of authentication workflows within AI models, providing developers with granular control over their auth stack for AI applications.
3
Keycloak↗
Keycloak is a popular open-source identity and access management solution that can be self-hosted and is increasingly integrated with AI agents, particularly through the Model Context Protocol (MCP).
Keycloak offers a highly customizable, open-source alternative to Auth0, providing full control over the identity infrastructure for both human users and AI agents, which requires more operational investment but avoids vendor lock-in.
4
Stytch↗
Stytch provides API-driven authentication and authorization with explicit support for AI agent identity management, focusing on secure, flexible integration with existing auth stacks.
Stytch offers a developer-centric, API-first approach to identity, including AI agents, with features like passwordless authentication and enterprise SSO, similar to Auth0 but with a strong emphasis on modern, flexible integration and AI agent identity as a core offering.
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Frequently Asked Questions
+What is Auth0?
Auth0 is an identity management platform tool developed by Auth0 (company) that enables developers and organizations to implement secure authentication and authorization for applications, users, and AI agents. It provides a flexible, drop-in solution to add secure login, identity management, and access control to applications without building these systems from scratch.
+Is Auth0 free?
Yes, Auth0 offers a Free plan that includes 25,000 Monthly Active Users (MAUs) and 1,000 Machine-to-Machine (M2M) tokens per month. Paid plans, such as Essentials and Professional, are available for higher usage and advanced features, with the B2C Essentials plan starting at $35/month for 500 MAUs.
+What are the main features of Auth0?
Auth0's main features include user authentication and authorization (supporting social logins, passwords, and passwordless methods), API security using OAuth 2.0, Single Sign-On (SSO), Multi-Factor Authentication (MFA), enterprise directory federation, user management tools, compliance assistance (SOC2, GDPR, HIPAA), monitoring and analytics, and dedicated authentication and authorization infrastructure for AI agents.
+Who should use Auth0?
Auth0 is suitable for developers building applications requiring secure identity management, organizations needing SSO across multiple platforms, enterprises requiring robust MFA and compliance, companies integrating AI agents into their workflows, and SaaS platforms seeking simplified user management and access control.
+How does Auth0 compare to alternatives?
Auth0 provides a comprehensive cloud-based CIAM solution. Compared to Okta for AI Agents, Auth0 offers a broader platform while Okta focuses on enterprise-scale AI agent governance. Against open-source options like SuperTokens and Keycloak, Auth0 offers a managed service, reducing operational overhead, whereas SuperTokens emphasizes developer-first open-source integration for LLMs, and Keycloak provides full self-hosted control. Compared to Stytch, Auth0 offers a similar developer-centric, API-first approach to identity, including AI agents, with a strong emphasis on modern, flexible integration.