FusionAuthvsKeycloak
How 10 AI models weigh FusionAuth against Keycloak on the 1 buying question where both came up.
- FusionAuth
- 18%of answers named it
- Keycloak
- 63%of answers named it
- Placed higher
- 7–20times FusionAuth vs Keycloak, over 27 model rankings that listed either
- Models leaning
- 2–6toward FusionAuth vs Keycloak; 2 even
Which models prefer which
Share of each model's answers that named each product, and how often its ranking put one above the other (a product listed beats one left off) · On the 1 shared question, every wording
| Model | FusionAuth | Keycloak | Placed higher | Leans |
|---|---|---|---|---|
| Claude Haiku 5.5 | 50% | 83% | 2–1 | FusionAuth |
| GPT-6 Luna | 8% | 58% | 0–2 | Keycloak |
| Gemini 4 Argon | 0% | 75% | 0–3 | Keycloak |
| Qwen 3.8 Flash | 0% | 100% | 0–4 | Keycloak |
| DeepSeek V4 Pro | 8% | 17% | 1–1 | Even |
| GLM-5.3 | 17% | 33% | 0–2 | Keycloak |
| Kimi K3 | 33% | 92% | 1–3 | Keycloak |
| MiniMax M3 | 0% | 50% | 0–2 | Keycloak |
| Mistral Large 4 | 8% | 58% | 1–1 | Even |
| Nemotron 3 Ultra | 60% | 60% | 2–1 | FusionAuth |
What the models say about FusionAuth
One reason per model, from the shared questions
- Claude Haiku 5.5
Self-hostable option with solid features and flexible licensing.
- Kimi K3
Self-hostable, developer-friendly, and affordable.
- Nemotron 3 Ultra
Self-hosted option with complete feature parity to SaaS
What the models say about Keycloak
One reason per model, from the shared questions
- Claude Haiku 5.5
Free open-source identity server, powerful but requires self-management.
- GPT-6 Luna
Powerful self-hosted open-source identity platform with extensive customization.
- Gemini 4 Argon
The most powerful self-hosted, open-source identity and access management solution available.
- Qwen 3.8 Flash
Top self-hosted open-source option with full OIDC/SAML.
- GLM-5.3
Free, self-hosted open-source IAM supporting OIDC/SAML at scale.
- Kimi K3
Free open-source, self-hosted, full OIDC/SAML with no vendor lock-in.
- MiniMax M3
Powerful self-hosted, open-source IAM for full control.
- Mistral Large 4
Free open-source option with full control, ideal for self-hosted and regulated environments.
- Nemotron 3 Ultra
Mature open-source IAM, widely deployed in enterprises
Tracked since October 25, 2026. Each time the panel answers these questions again, both shares are added here.
Question by question
Share of all answers that named each, every wording pooled, with its place among every product named · Both-named questions first
| Question | FusionAuth | Keycloak |
|---|---|---|
| Best authentication services for web apps | 18% #18 | 63% #5 |