Complete multi-tenant authentication solution built for B2B SaaS platforms. Launch faster, scale confidently.
Building authentication for SaaS platforms is complex. We make it simple.
Without proper isolation, customer data can accidentally leak between tenants
Building secure tenant isolation from scratch takes months
Each enterprise customer has different SSO requirements
Performance degrades as you add more tenants and users
Database-level isolation ensures zero data leakage
Built-in multi-tenancy, no retrofitting required
OIDC, SAML, and custom IdP support out of the box
Handles millions of users across thousands of tenants
Everything you need to build and scale a multi-tenant SaaS platform
Complete data isolation between tenants with automatic tenant detection and routing.
Customizable login pages and flows that match your customer's brand.
Flexible RBAC system with tenant-specific roles and permissions.
Automatically scales with your tenant and user growth.
Comprehensive analytics for tenant usage and authentication patterns.
Simple, consistent APIs with comprehensive documentation and SDKs.
Real SaaS companies that chose 23blocks for their authentication
Project Management SaaS
"We launched with 23blocks multi-tenant auth and scaled to 10k organizations without a single authentication issue. The white-label capabilities let us win enterprise deals we never thought possible."
Sarah Chen
CTO, ProjectPro
Business Intelligence Platform
"The tenant isolation gave us the confidence to pursue enterprise customers. We now serve Fortune 500 companies with complete data security assurance."
Michael Rodriguez
Founder, AnalyticsHub
Get your SaaS platform up and running in minutes
Configure tenant isolation and automatic routing
// Configure tenant detection
const tenantConfig = {{
detection: 'subdomain', // or 'header'
isolation: 'database',
routing: 'automatic'
}};
await blocks.auth.configureTenancy(tenantConfig);Customize authentication for each tenant
// Per-tenant customization
const brandingConfig = {{
tenant: 'acme-corp',
logo: 'https://acme.com/logo.png',
colors: {{ primary: '#1a365d' }},
domain: 'auth.acme.com'
}};
await blocks.auth.updateBranding(brandingConfig);Deploy with confidence and automatic scaling
// Authentication scales automatically
const user = await blocks.auth.authenticateUser({{
token: request.headers.authorization,
tenant: request.headers['x-tenant-id']
}});
// Tenant-aware user context
console.log(user.tenant); // 'acme-corp'Launch with enterprise-grade multi-tenant authentication from day one
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