Authentication platform for web applications and AI agents with passwordless login, session management, fraud prevention, and specialized MCP authentication.
Modern authentication for apps — passwordless login, multi-factor auth, and fraud prevention that's easy to integrate.
Stytch is a developer-first authentication and identity platform designed for modern applications and AI agent systems. In 2026, Stytch has evolved to become the leading authentication solution for AI agents and MCP (Model Control Protocol) implementations, while maintaining its strong foundation for traditional web applications.
The platform's core innovation is treating AI agents as first-class authentication entities alongside human users. Stytch provides specialized authentication flows for AI agents accessing APIs, services, and data on behalf of users, with fine-grained consent management and authorization scoping. The platform handles complex scenarios where AI agents need to authenticate across multiple services while maintaining user privacy and consent boundaries.
Stytch's AI agent authentication includes token-based auth with automatic rotation, scope-limited permissions, real-time consent revocation, and comprehensive audit logging. The platform's fraud detection specifically identifies malicious or misbehaving agents, protecting against agent impersonation and unauthorized data access.
For traditional applications, Stytch maintains its passwordless-first approach with email magic links, SMS OTP, WhatsApp OTP, biometric authentication, and WebAuthn passkeys. The platform provides configurable session tokens with fine-grained controls, step-up authentication for sensitive actions, and integrated fraud prevention through device fingerprinting.
The B2B product includes multi-tenant organization management, RBAC, SAML SSO, and SCIM provisioning. The platform's embeddable admin portal allows customers to self-serve auth settings, making it ideal for SaaS applications serving enterprise customers.
Stytch offers both headless APIs for complete UI control and SDK components for faster implementation. The platform provides production-ready SDKs for React, Next.js, Python, Go, Ruby, iOS, Android, and Flutter with comprehensive documentation.
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Stytch provides developer-first authentication infrastructure with excellent APIs for passwordless login, session management, and fraud prevention. The documentation is outstanding and the API design is notably clean. Ideal for engineering teams building custom auth flows rather than using pre-built UI components. Smaller ecosystem than Auth0/Okta but growing quickly, with particularly strong passwordless and device fingerprinting capabilities.
Specialized authentication and authorization for AI agents with consent management, scope-limited permissions, and MCP protocol support
Use Case:
Authenticating AI assistants that access user Gmail, calendar, and CRM data with granular consent and automatic token rotation
Comprehensive passwordless methods including magic links, OTP, biometrics, passkeys, and OAuth with seamless fallback chains
Use Case:
Implementing a login flow that starts with passkey authentication, falls back to magic links for unsupported devices, and uses SMS OTP as final fallback
Configurable session tokens with custom claims, step-up authentication, granular revocation, and integrated risk-based session policies
Use Case:
Requiring re-authentication for financial transactions even within an active session, with configurable step-up challenge methods
Cookieless device identification and risk scoring that detects account takeover, bots, and credential stuffing without impacting user experience
Use Case:
Automatically blocking login attempts from known bot networks while allowing legitimate users to authenticate without additional friction
Multi-tenant organization structure with RBAC, SAML SSO, SCIM provisioning, and per-organization authentication policies
Use Case:
Allowing enterprise customers to configure their own SSO provider and enforce their organization's MFA policy within your SaaS application
Pure API-first approach with no mandatory UI components, giving developers complete control over authentication UX and branding
Use Case:
Building a fully custom login experience that matches your product's design system perfectly without iframe constraints or UI overrides
Production-ready SDKs for React, Next.js, Python, Go, Ruby, iOS, Android, and Flutter with comprehensive documentation
Use Case:
Implementing consistent authentication across a React web app and React Native mobile app with shared session management
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Usage-based pricing
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View Pricing Options →Multi-tenant B2B SaaS applications requiring organization-level auth settings and customer self-service portals
AI agent platforms needing specialized authentication, authorization, and consent management for automated systems
Enterprise applications requiring SSO, SCIM provisioning, and fine-grained role-based access control
Consumer applications prioritizing passwordless authentication and fraud protection with seamless user experience
Startups building authentication systems that need to scale from basic auth to enterprise features without migration
Platforms requiring MCP protocol support for AI agent interactions and security monitoring
Stytch works with these platforms and services:
We believe in transparent reviews. Here's what Stytch doesn't handle well:
Stytch is more developer-focused and API-first with no mandatory UI components, while Auth0 provides pre-built login pages and a broader feature set. Stytch has stronger passwordless authentication and device fingerprinting built-in, while Auth0 offers more mature enterprise features and a larger integration ecosystem. Stytch is typically preferred by teams that want maximum UI control and modern auth methods.
Yes, Stytch supports passwords alongside passwordless methods. However, the platform is designed with passwordless as the primary approach. You can implement password authentication with Stytch's APIs, but the platform's strongest features and documentation are oriented toward passwordless flows.
Stytch offers a free tier with up to 25 organizations and 1,000 members for B2B, or 10,000 MAUs for B2C. Paid plans start at $249/month for B2B and scale based on organizations and members. B2C pricing is based on monthly active users. Enterprise pricing includes custom features and dedicated support.
Yes, Stytch's B2B product includes SAML SSO support, SCIM provisioning, organization-level authentication policies, and RBAC — the features enterprise customers typically require when adopting SaaS products. This makes it suitable for B2B SaaS applications that need to support enterprise security requirements.
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In 2026, Stytch launched comprehensive AI agent authentication with specialized MCP integration, agent fraud detection, consent management workflows, and turnkey authorization for AI systems accessing user data across multiple services.
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See how Stytch compares to Auth0 and other alternatives
View Full Comparison →Security & Access
Identity platform with authentication, authorization, and user management for web, mobile, and API applications. Free up to 25,000 MAUs, paid plans from $35/month.
Security & Access
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