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

Kinde offers transparent pricing that grows with your business:

The Free plan costs nothing and includes up to 10,500 monthly active users. You get all basic features including authentication, organizations, feature flags, and standard support. This plan works great for getting started and testing.

The Pro plan costs $25 per month and removes limits on users and organizations. You keep the 10,500 free monthly active users, then pay only for additional usage. This plan adds API keys and removes Kinde branding.

The Plus plan at $75 monthly includes enterprise single sign-on for free, six different environments, and priority features. You also get discounts on transaction fees and user costs.

The Scale plan costs $250 per month and provides the most advanced features including custom domains for each organization, custom email settings, and complete security reports. This plan offers the biggest discounts for high-volume usage.

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.