10 buyer questions asked on ChatGPT, Gemini, Perplexity — 30 answers analysed, 2026-09-20. Ranked by how many answers named each product. Clerk was named most often (20 of 30).
| # | Product | Answers naming it | Share of voice | % |
|---|---|---|---|---|
| 1 | Clerk | 20 |
|
67% |
| 2 | Auth0 scored 63/100 | 19 |
|
63% |
| 3 | Firebase Authentication | 13 |
|
43% |
| 4 | WorkOS | 12 |
|
40% |
| 5 | Stytch | 11 |
|
37% |
| 6 | Supabase Auth | 11 |
|
37% |
| 7 | Amazon Cognito | 9 |
|
30% |
| 8 | Keycloak | 8 |
|
27% |
| 9 | Okta | 8 |
|
27% |
| 10 | Descope | 5 |
|
17% |
| 11 | Frontegg | 4 |
|
13% |
| 12 | Microsoft Entra ID | 4 |
|
13% |
| 13 | AWS Cognito | 3 |
|
10% |
Which one do the AI assistants actually name more often?
Clerk vs Auth0Clerk vs Firebase AuthenticationAuth0 vs Firebase AuthenticationWe'll ask the same 10 questions about your product and show you which ones you're missing from. Takes about a minute — no account, no card.
Scanning in authentication as a service — the same category as this table.
Method: each surface was asked the same 10 buyer questions; every answer was analysed for which products it named. Counts are mentions in answers, not endorsements. Nobody pays to be listed.