{"meta":{"dataMonth":"2026-09","source":{"traffic":"traffic.cv panel estimates, month 2026-09, 12-month history","companies":"yc-oss API mirror of the public YC directory, fetched 2026-10-22","press_and_founders":"YC public company pages via YC Mode, crawled 2026-07","brand_search":"DawnTrend brand-search collection (Google monthly search volume for the company name, bucketed), Sep 2025 to Aug 2026, collected 2026-09-30","logos":"YC public company logos"},"method":"attention minutes = monthly visits x average visit seconds / 60. mindshare = a company's attention minutes / sum over the index. change3 = visits in 2026-09 vs 2026-06. Visits are rounded to 3 significant figures."},"company":{"visitsAligned":222.4,"slug":"21st","name":"21st","domain":"21st.dev","batch":"Winter 2026","year":2026,"status":"Active","industry":"B2B","category":"Engineering, Product and Design","tags":[],"stage":"Early","teamSize":3,"isHiring":false,"location":"San Francisco, CA, USA","oneLiner":"UI building blocks for the agentic internet","ycUrl":"https://www.ycombinator.com/companies/21st","logo":"/logos/21st.png","visits":2400000,"last3":[2270000,2230000,2400000],"jun":2080000,"change3":15.2,"changeMonth":7.5,"avgVisitSec":343,"bounce":31.2,"pagesPerVisit":8.27,"globalRank":15687,"attentionMin":13700000,"history":[{"m":"2025-10","v":636000},{"m":"2025-11","v":715000},{"m":"2025-12","v":689000},{"m":"2026-01","v":756000},{"m":"2026-02","v":817000},{"m":"2026-03","v":1690000},{"m":"2026-04","v":2060000},{"m":"2026-05","v":2420000},{"m":"2026-06","v":2080000},{"m":"2026-07","v":2270000},{"m":"2026-08","v":2230000},{"m":"2026-09","v":2400000}],"keywords":[{"name":"21st dev","volume":201100,"cpc":1.74},{"name":"21st","volume":40840,"cpc":1.42},{"name":"21dev","volume":32990,"cpc":2.25},{"name":"21 dev","volume":15510,"cpc":1.8},{"name":"21stdev","volume":14690,"cpc":3.32}],"founders":[{"name":"Serafim Korablev","title":"CEO / co-founder","linkedin":"https://www.linkedin.com/in/serafimkorablev"},{"name":"Sergey Bunas","title":"Founder","linkedin":"https://www.linkedin.com/in/s-bunas/"}],"news":[],"rank":70,"mindshare":0.043,"industryRank":37,"industryRankOf":1206,"categoryRank":6,"categoryRankOf":226,"batchRank":2,"batchRankOf":58,"percentile":97,"industryMedianVisitSec":68,"cautions":[],"brandedShare":84,"lens":["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."],"search":{"kw":"21st","vol":43500,"change":39.9,"series":[27100,33100,33100,27100,33100,27100,40500,40500,40500,40500,40500,49500]},"peers":["dropbox","substack","prolific","meesho","supabase"],"industrySeries":[100,95.3,98.1,108.3,101.4,114.7,113.3,114.4,112.2,115.9,116.9,118.3]}}