{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"observations","count":5,"filters":{"markets":["us-ai-assistant-usage","us-search-engine-usage"],"marketsMatched":true,"matchedMarketCount":2,"matchedMarketSlugs":["us-ai-assistant-usage","us-search-engine-usage"],"unmatchedMarkets":[]},"rows":[{"id":"obs-ai-chatbot-2026","marketId":"mkt-ai-chatbot","year":2026,"hhi":4804,"concentrationClass":"highly_concentrated","totalMarketSize":null,"marketSizeUnit":null,"sourceNotes":"StatCounter reports all-platform AI chatbot usage shares for May 2026.","dataStatus":"estimated_public","confidenceLevel":"medium","calculationMethod":"computed_from_public_shares","sourceId":"statcounter-ai-chatbot-us-2026","sourceUrl":"https://gs.statcounter.com/ai-chatbot-market-share/all/united-states-of-america","sourceName":"AI chatbot market share in United States of America May 2026","sourcePublisher":"StatCounter Global Stats","dataYear":2026,"methodologyNote":"HHI is computed from listed StatCounter percentages, which sum to 100 across tracked assistants.","notes":"Usage share is a public web-analytics proxy and not AI revenue or total user counts.","sourceProfileHref":"/sources/statcounter-ai-chatbot-us-2026"},{"id":"obs-search-2023","marketId":"mkt-search","year":2023,"hhi":7950,"concentrationClass":"highly_concentrated","totalMarketSize":null,"marketSizeUnit":null,"sourceNotes":"StatCounter reports U.S. all-platform search engine referral shares for April 2023.","dataStatus":"estimated_public","confidenceLevel":"medium","calculationMethod":"computed_from_public_shares_with_residual_other","sourceId":"statcounter-search-us-2026","sourceUrl":"https://gs.statcounter.com/chart.php?device=Desktop%20%26%20Mobile%20%26%20Tablet%20%26%20Console&device_hidden=desktop%2Bmobile%2Btablet%2Bconsole&multi-device=true&statType_hidden=search_engine&region_hidden=US&granularity=monthly&statType=Search%20Engine&region=United%20States%20of%20America&fromInt=202304&toInt=202604&fromMonthYear=2023-04&toMonthYear=2026-04&csv=1","sourceName":"Search engine market share in United States of America April 2023","sourcePublisher":"StatCounter Global Stats","dataYear":2023,"methodologyNote":"HHI is computed from six named StatCounter shares and a residual Other category that closes coverage to 100 percent.","notes":"April snapshot from a monthly referral-share series; 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