Stack Auth vs Auth0: Features, Pricing and User Reviews 2026

Stack Auth offers transparent pricing that scales with your needs. The Free plan is perfect for individuals and small projects, supporting up to 10,000 users with unlimited projects and teams. You get one dashboard administrator and access to all core authentication features.

The Team plan costs $49 per month and increases your user limit to 50,000 users. It includes three dashboard administrators, with additional admins available at $49 each. This plan is ideal for early startups and small teams building their products.

The Growth plan at $299 per month removes all user limits entirely. You get unlimited users, projects, and teams, along with five dashboard administrators included. Additional admins cost $49 each. This plan is designed for growing businesses that need to scale without worrying about user count restrictions.

All plans include the same core features, with the main differences being user limits and admin accounts.

Auth0 offers flexible pricing for different business needs with separate plans for consumer-facing applications and business software.

For B2C Applications (Business to Consumer), the Free plan supports up to 25,000 monthly active users with basic features. The Essentials plan costs $35 monthly for 500 users and includes multi-factor authentication and better limits. The Professional plan is $240 monthly for 1,000 users with advanced security features. Enterprise plans offer custom pricing with dedicated support and guaranteed uptime.

For B2B Applications (Business to Business), pricing starts higher. The Free plan includes the same 25,000 users. Essentials costs $150 monthly, Professional is $800 monthly, and Enterprise plans are available with custom pricing. All paid plans can be billed monthly or yearly, with yearly billing offering one month free.