Auth0 vs Keycloak: Pricing and Ratings Compared (2026)
Entry prices and free plans as read on each vendor's pricing page, and user ratings as published on review sites, for Auth0 and Keycloak side by side. This page compares data; it is not a hands-on review.
On the data: On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
Short on time? Here's the quick answer
Based on published vendor pricing and features and on public review data, here's who should pick what:
Auth0
Identity platform for developers
Best for you if:
- • You want easy integration
Keycloak
Open-source identity and access management
Best for you if:
- • You want a fully free tool (Auth0 requires payment)
| At a Glance | Auth0 | |
|---|---|---|
Starts at | Free plan, paid from $35/mo, billed monthly Essentials plan | Free 100% free |
Category | Identity & Access Security | Identity & Access Security |
Rating | 4.5/5 G2 4.3 · Capterra 4.7 424 reviews | n/a |
Free plan | Yes | Yes |
Watch out for | Overage pricing at $0.07/MAU applies per user beyond the base limit. | n/a |
Choose Auth0 or Keycloak?
Choose Auth0 if
- You want easy integration
- You want many features
Choose Keycloak if
- You want a fully free tool (Auth0 requires payment)
- You want open source identity
- You want self-hostable
In-Depth Analysis
Auth0
Identity platform for developers
Auth0's free tier at 25,000 MAUs is the most generous in the identity space, far ahead of Firebase Auth (free at 50K MAUs but with fewer features) and Clerk (500 MAUs free).
Watch out
Overage pricing at $0.07/MAU applies per user beyond the base limit.
Strengths
- Pro: Easy integration
- Pro: Many features
- Pro: Great docs
Weaknesses
- Con: Expensive at scale
- Con: Complex pricing
Key features
Keycloak
Open-source identity and access management
Keycloak's pricing is exceptionally generous, being entirely free as an open-source solution.
Strengths
- Pro: Open source identity
- Pro: Self-hostable
- Pro: Feature rich
- Pro: No per-user cost
- Pro: Enterprise ready
Weaknesses
- Con: Complex to set up
- Con: Requires maintenance
- Con: Learning curve
- Con: Java-based
- Con: UI dated
Key features
Plans and prices: Auth0 vs Keycloak
| Tool | Plans and prices | Source |
|---|---|---|
| Auth0 |
| auth0.com/pricing read Oct 31, 2026 |
| Keycloak |
| keycloak.org read Sep 28, 2026 |
Prices as read on each vendor's own pricing page on the date shown. Plans are listed per tool and are not matched against the other tool's plans: a plan name or price in one column says nothing about the same row in the other. Details on Auth0 pricing and Keycloak pricing.
Key Takeaways
Auth0
- Choose if you want identity platform for developers
Keycloak
- Choose if you want open-source identity and access management
What the data shows
On the data below the two are close or not directly comparable, so we do not name a winner for this pair.
- Only Auth0 has a published user rating (4.5/5 from 424 reviews); Keycloak has none we can show.
- Auth0 starts at $35/mo, billed monthly; Keycloak has no public paid plan price on file.
- Both have a free plan.
Criteria: user rating (only above 20 reviews on both sides, gap of 0.2 or more), entry price (only on the same billing basis), free plan. How we rate
Frequently Asked Questions
How do Auth0 and Keycloak compare in 2026?
On the data below the two are close or not directly comparable, so we do not name a winner for this pair. Only Auth0 has a published user rating (4.5/5 from 424 reviews); Keycloak has none we can show. Auth0 starts at $35/mo, billed monthly; Keycloak has no public paid plan price on file. Both have a free plan.
What are Auth0 and Keycloak used for?
Auth0: Identity platform for developers. Keycloak: Open-source identity and access management.
What does Auth0 cost vs Keycloak?
Auth0's cheapest paid plan is Essentials at $35/mo, billed monthly; it also has a free plan. Keycloak is free. Prices read on the vendors' pricing pages, latest check Oct 31, 2026.
What's the main difference between Auth0 and Keycloak?
Auth0's main strength: easy integration. Keycloak's main strength: open source identity.