PropelAuth

Authentication and authorization platform built specifically for B2B products. Organizations are a first-class concept, with multi-tenant auth tailored for teams, roles, and invitations from pre-launch through to enterprise scale. Offers both a fully managed cloud service and a self-hosted bring-your-own-auth option for teams that need full control.

Powers auth for thousands of B2B businesses across all stages of growth. PropelAuth differentiates by focusing exclusively on B2B use cases, avoiding consumer-oriented features and pricing complexity. Supports AI-native workflows with first-class MCP server authentication. Ships idiomatic client libraries for React, Next.js, FastAPI, Flask, .NET, Spring Boot, Remix, Axum, Go, and Laravel.

Key capabilities:

• Organizations and advanced RBAC with custom roles and permissions globally or per organization
• Enterprise SSO and SCIM: SAML, OIDC, and directory provisioning with self-service customer onboarding
• MCP server auth with OAuth 2.1 flows, dynamic client registration, custom scopes, and token revocation
• Hosted UIs and customizable component library for quick launch or full branding control
• Built-in audit logs, user impersonation with audit trails, API keys, password policies, and enforced MFA

Teams use it for B2B SaaS needing organization management and team invites, products that onboard both humans and AI agents, and sales cycles requiring enterprise SSO and security questionnaires. Backend and frontend SDKs integrate directly with existing stacks, and migrations from other auth providers are supported without disrupting users.