Tesseral is a B2B user management platform that provides authentication, authorization, and API security capabilities for SaaS applications. The platform offers pre-built login UI components that can be customized to match brand styling and support multiple authentication methods. The product supports enterprise identity provider integrations through SAML single sign-on and SCIM programmatic provisioning, enabling connections with providers like Okta, Microsoft Entra (Azure), and Google. Multi-factor authentication options include passkeys for phishing-resistant authentication, authenticator apps using TOTP, and support for physical security keys. Tesseral includes role-based access control (RBAC) functionality that allows organizations to design fine-grained access control policies and offer custom roles to customers. The platform provides managed API keys that can be issued with custom scopes and revoked as needed, extending API access to customers and integration partners. Additional features include user impersonation for troubleshooting customer accounts, webhooks for real-time updates, and SDKs for major web frameworks including Next.js, React, Flask, Express.js, and Go. The platform is designed for B2B SaaS applications requiring enterprise-ready authentication and authorization capabilities.