FusionAuthDownloadable, API-first customer identity and auth you can deploy anywhere.
vs
KeycloakOpen source identity and access management
Comparison · Identity & Access Management · weekly run Nov 3
FusionAuth vs Keycloak
Which one do AI engines recommend, and how do they differ on price, fit and features?
The short answer
Keycloak is the stronger AI pick in Identity & Access Management: it has a visibility score of 5.6 versus 1 for FusionAuth.
Choose FusionAuth if…
- AI answers describe it more positively (100% vs 33% positive)
- You need a self-hosted or on-premises option
- You need SOC 2 Type II or ISO 27001 or HIPAA BAA available or GDPR coverage
- Clear public pricing tiers
Choose Keycloak if…
- You want the brand AI engines rank higher (5.6 vs 1)
- Free and open-source software
- Strong flexibility and customization for technical teams
- Top pick as a self-hosted option
AI visibility side by side
Latest weekly run · Nov 3
| Metric | FusionAuth | Keycloak |
|---|---|---|
| Visibility score | 1% | 5.6% |
| Change vs last week | up+1% | down−0.3% |
| Rank in Identity & Access Management | #29 | #15 |
| Share of voice | 0.4% | 2.1% |
| Mentions this run | 1 | 7 |
| Positive in AI answers | 100% | 33% |
The stronger value in each row is marked with a ✓.
Visibility score trend
Weekly runs over the last 60 days
FusionAuth +0.6pp · Keycloak −0.7000000000000002pp over 1 weekly runs.
Engine by engine
Keycloak leads on 3 of 3 engines
ChatGPT
AI Mode
Perplexity
FusionAuthKeycloak
Head to head in AI answers
0 engine answers name both brands
0FusionAuth ranked higher
0Keycloak ranked higher
Features, pricing & fit
| Dimension | FusionAuth | Keycloak |
|---|---|---|
| Pricing model | Usage-based | — |
| Entry price | Free; paid from $162 / mo | — |
| Free plan | Yes | — |
| Deployment | Self-hosted, on-premises, hybrid, air-gapped, or FusionAuth Cloud (dedicated hosting) | Self-hosted; ships as a single lightweight container image, with clustering for scalability and availability |
| Compliance | SOC 2 Type II, ISO 27001, HIPAA BAA available, GDPR | — |
| Support | Community forums and GitHub, Email support, 24/7 email and phone support, Private Slack channel | Community support via GitHub Discussions, Commercial support via Red Hat build of Keycloak |
| Founded | 2009 | 2014 |
| Headquarters | Broomfield, CO, United States | — |
| Employees | 51–200 | — |
| Funding | Growth (led by Updata Partners) · $65M raised | — |
| Best for | Developer and engineering teams that need customer authentication they can self-host or run on dedicated infrastructure. | Teams that want to self-host standards-based single sign-on and identity brokering for their applications |
Plans side by side
FusionAuth
Community$0self-hosted
Starter$162month, starting at, billed annually (1,000 MAUs)
Essentials$2,970month, starting at, billed annually (1,000 MAUs)
Enterprise$2,970month, starting at, billed annually (1,000 MAUs)
Keycloak
Pricing not available.
Pros and cons
Themes from the AI answers that mention each brand
FusionAuth
- Clear public pricing tiers
- Fully featured open-source self-hosted option
- No forced enterprise sales
Keycloak
- Free and open-source software
- Strong flexibility and customization for technical teams
- Top pick as a self-hosted option
- Backed by Red Hat and community; popular open-source IAM tool
- Supports SAML, OAuth 2.0, and OpenID Connect
- Team must handle hosting, upgrades, backups, and security
- Less operational simplicity than managed alternatives
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 98.8%·next run
Cite as: SlateIndex, “FusionAuth vs Keycloak”, https://slateindex.ai/compare/fusionauth-vs-keycloak, data of Nov 3, 2026. Licence: CC BY 4.0.