DevTool AI Index · 2026-11-05
Which authentication tools do AI assistants recommend?
Asked neutral build questions about authentication, AI assistants name Auth0 most often (33% of answers on average), then Keycloak (30%). Gemini names Auth0 most (27%); Claude names Auth0 most (40%).
500 neutral build questions in 25 categories, written so they never name a product. Each question is asked 3 times to every engine, because AI answers change from run to run. A share is the part of answers that names the tool. The range in brackets is a 95% interval: with fewer answers it is wider. Engines this run: Gemini, Claude (plain model answers, no web search). Run date 2026-11-05.
Top 10 tools
| # | Tool | Gemini | Claude |
|---|---|---|---|
| 1 | Auth0 | 27% [17% to 39%] | 40% [29% to 53%] |
| 2 | Keycloak | 23% [14% to 35%] | 37% [26% to 49%] |
| 3 | Okta | 13% [7% to 24%] | 20% [12% to 32%] |
| 4 | Clerk | 15% [8% to 26%] | 18% [11% to 30%] |
| 5 | Firebase | 10% [5% to 20%] | 12% [6% to 22%] |
| 6 | Ory | not named | 22% [13% to 34%] |
| 7 | Stytch | 8% [4% to 18%] | 8% [4% to 18%] |
| 8 | Supabase | 13% [7% to 24%] | not named |
| 9 | 10% [5% to 20%] | not named | |
| 10 | Zitadel | not named | 10% [5% to 20%] |
Answers per engine: Gemini 60, Claude 60.
Is your tool missing or low?
AI assistants learn which tools to name from docs, comparisons and the pages they cite. Factline AI Visibility tracks your own questions and competitors over time, with the same method.
Other categories
relational database hosting (Postgres/MySQL) · vector database · backend-as-a-service · frontend hosting and deployment · serverless and edge functions · payments and billing · transactional email · observability and logging · error tracking · feature flags · background jobs and queues · search engine for apps · file storage and CDN · CMS (headless) · LLM API provider · AI agent framework · LLM observability and evals · web scraping and browser automation API · analytics (product) · CI/CD · infrastructure as code · realtime and websockets · maps and geocoding API · SMS and phone API