FusionAuth vs Auth0
Side-by-side — pricing, strengths, tradeoffs, and fit.
FusionAuth
Auth that works the way you want
Auth0
Enterprise-grade authentication and authorization platform with extensive identity-provider support.
At a glance
Free Tier
· Not enough data·From Freemium
Free TierEnterprise
● Established·From $35/mo
Overview
One-liner
One-liner
Auth that works the way you want
One-liner
Enterprise-grade authentication and authorization platform with extensive identity-provider support.
Maturity
Maturity
Not enough dataMaturity
EstablishedOpen source
Open source
✕ NoOpen source
✕ NoPricing
Free tier
Free tier
✓ AvailableFree tier
✓ Available25,000 monthly active users on the free plan
Starts at
Starts at
Freemium
Starts at
$35/mo
Model
Model
Hybrid
Model
Per MAU
Enterprise
Enterprise
✕ NoneEnterprise
✓ AvailableBest for
✓ Best for
Teams needing self-hosted, enterprise-grade CIAM with unlimited users and full control over data
✓ Best for
Enterprise B2B apps needing SSO/SAMLMature enterprise connections and compliance
Teams needing fine-grained authorizationRBAC and Actions cover complex authz
Not ideal for
✕ Not for
Teams wanting a fully managed SaaS with minimal infrastructure overhead
✕ Not for
—
Strengths
↑ Strengths
Unlimited users
Self-hosted
SSO
MFA
↑ Strengths
Deep enterprise identity features
Huge ecosystem of connections/rules
Battle-tested at scale
Weaknesses
↓ Weaknesses
—
↓ Weaknesses
Essential enterprise features like Enterprise Connections and SCIM are not available on the Essentials or Professional plans.
The free tier requires credit card verification to enable custom domains.