21st
21st.dev · Winter 2026
UI building blocks for the agentic internet
- Visits, September
- 2.4M +7.5% vs August
- 3 month change
- ▲+15% September vs June
- Average visit
- 5:43 industry median 1:08
- Attention minutes
- 14M 0.043% of the index
What you can learn
- Ranks #37 of 1206 in B2B, ahead of 97% of its peers.
- People stay 5:43 a visit, 5.0x the B2B median of 1:08. Strong engagement.
- Visits up 15.2% since June, from 2.08M to 2.4M a month.
- Holds 0.043% of all attention minutes in the index.
- About 84% of its tracked search volume is its own name: it depends on people who already know it.
- Its name was searched about 43.5K times a month on Google (Jun to Aug 2026), up 39.9% on Oct to Dec 2025.
- Brand searches and visits are both rising: attention is building before and after the click.
Visits per month
Oct 2025 to Sep 2026. Source: traffic.cv panel estimate.
Against its industry
Indexed to October 2025 = 100. 21st against all measured B2B companies.
Searches against visits
Google searches for "21st" (DawnTrend brand-search collection (Google monthly search volume for the company name, bucketed), Sep 2025 to Aug 2026, collected 2026-09-30) against site visits (traffic.cv). Indexed to October 2025 = 100, October to August.
Top search terms
Searches that send people to 21st.dev, with monthly search volume. Panel estimates: a term can be unrelated to the company.
- 21st dev201K
- 21st40.8K
- 21dev33K
- 21 dev15.5K
- 21stdev14.7K
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YC profile · 21st.dev · JSON