21st: Dawn score and attention ranking
21st scores 65 out of 100 on the Dawn Index, built from 5 signals. It ranks #12 of 397 in Engineering, Product and Design (YC), #4 of 113 in YC Winter 2026, #54 of 2075 in B2B (YC), #90 of 4224 in Y Combinator.
What drives the 21st Dawn score?
| Signal | Weight | Score (0 to 100) |
|---|---|---|
| Search scale | 20% | 42 |
| Search momentum | 20% | 74 |
| Site scale | 15% | 55 |
| Site momentum | 10% | 51 |
| Loyalty | 20% | 99 |
How does 21st compare in Engineering, Product and Design (YC)?
| Rank | Brand | Dawn score |
|---|---|---|
| 1 | Resend | 78 |
| 2 | Replit | 73 |
| 3 | RevenueCat | 73 |
| 4 | Doppler | 70 |
| 5 | FlutterFlow | 70 |
| 6 | GitLab | 68 |
| 7 | Superlog | 66 |
| 8 | Langfuse | 66 |
Where do the numbers come from?
Search figures are Google search estimates for the brand and its products. Site figures are third-party traffic estimates. A Dawn score measures attention, not revenue.