Courier ID

🎯 Passwordless Made Simple

Users authenticate with just their email and a verification code. No passwords to remember, reset, or compromise.

• Instant authentication - Users receive a code via email and they're in
• Zero friction - No complex password requirements or forgotten password flows
• Secure by default - Cryptographically secure OTP with automatic rate limiting
• Multi-language - English and French support with smart detection

🏢 True Multi-Tenant Architecture

Serve multiple customers with complete isolation between tenants. Each realm is its own secure environment.

Per-Realm Configuration:

• Independent SMTP settings for branded emails
• Separate JWT signing keys (ES256)
• Custom rate limits and security policies
• Domain whitelisting/blacklisting
• Unique OAuth2 clients and user bases

Complete Flexibility:

• Create unlimited realms for different customers or environments
• Enable/disable realms instantly
• Assign realm-specific administrators
• Full branding control per tenant

🔒 Enterprise-Grade Security

Built with security-first principles and compliance in mind.

• OAuth2/OIDC compliant - Full RFC 6749, 7636, OpenID Connect 1.0
• PKCE mandatory - Enhanced security for all authorization flows
• ES256 JWT signing - Elliptic curve cryptography with key rotation
• Comprehensive audit logs - Every authentication event tracked
• Code reuse detection - Automatic token revocation on security violations
• Rate limiting - Configurable per realm to prevent attacks

⚡ Ready in Minutes

From setup to production-ready authentication quickly and efficiently.

• Simple configuration - Intuitive admin interface for all settings
• Quick onboarding - Get your instance configured and ready fast
• Seamless setup - No complex technical configuration required
• High availability - Built for reliability and performance

🎨 Dedicated SaaS Deployment

Your own private instance, fully managed. No shared infrastructure, no vendor lock-in, no per-user fees.

• Dedicated deployment - Exclusive instance deployed for your organization
• Your data - Complete data isolation and control
• Fully managed - We handle infrastructure, updates, and maintenance
• Deployed on our infrastructure - Secure, reliable hosting managed by us
• Predictable pricing - No per-user fees, just flat instance pricing