Anthropic's Claude grew from 1.4% to 14.9% daily active user market share between January and September, while ChatGPT's DAU share fell from 41.8% to 30.7% in the same period. Claude's monthly US downloads peaked at 7.42 million in March, up from 670,000 in January, before settling at 3.26 million in September. Claude's January-to-March download gain of 6.75 million exceeded the total gain across all AI apps combined, which was 6.46 million, per Apptopia.
The engagement numbers cut against the narrative that Claude is a distant second. Claude users averaged 27 minutes per DAU in September, ahead of Grok at 23.4 and ChatGPT at 23.1. Users who downloaded Claude after using ChatGPT spent 13.5% less time in ChatGPT the following month. Claude's website logged 950 million visits and 111 million unique visitors in August, 540% and 562% year-over-year growth respectively, per Similarweb. Claude's share of web traffic among top AI assistants rose from 2% to 9.6% as ChatGPT's share dropped from 79% to 57%.
The original piece, sourced from Similarweb and Apptopia data compiled by Big Technology, matters because it puts hard numbers behind Anthropic ahead of its IPO. Revenue and loss figures already leaked. What leaked less cleanly is the competitive position. Read it for the enterprise data and the full breakdown of how Grok, Gemini, and Copilot are faring against both Claude and ChatGPT. The trajectory is the story.
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