September 21, 2026

TechCrunch Top 3

Meta's Muse is outpacing ChatGPT’s early mobile launch: Meta’s new AI agent Muse has racked up more downloads and daily active users in the U.S. and Canada than ChatGPT did over the same period after its mobile debut, according to new estimates from Appfigures. Read More

X will now tell users when governments have forced it to limit their posts: X is expanding its “Under the Hood” transparency tool to show when posts have been downranked or withheld in response to local laws and government demands, including which country made the request. Read More

OpenAI forms math advisory group as its AI resolves more than 100 open problems: The group won't be given leeway to slow down or redirect OpenAI's ongoing mathematical research. Read More

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Afternoon Must-Reads

Corridor raises $25M seed to build a health benefits brokerage for SMBs: Corridor focuses on SMBs, which it says traditional brokerages often overlook because small accounts generate lower commissions than larger accounts. Read More

With Tabby, a former accountant is using AI to make accountants obsolete: Tabby is designed to be a real-time bookkeeping interface, handling clients’ paperwork as it gives them up-to-the-minute data on their business’s profit and loss. Read More

Google's $899 Googlebook is a bet that you'll buy a new laptop for Gemini: Google’s AI-native Googlebook ties Gemini to the cursor, dictation, widgets, and other parts of the desktop experience. Read More

Meta's AI agent has been blocked from using Amazon.com: Amazon has its own cohort of foundation models, along with one of the most popular inference platforms on the internet. As long as they're under no legal obligation to open the doors to Muse, why would they? Read More

Oura's $2.2B IPO is mostly a payday for existing shareholders: Forerunner Ventures plans to sell its entire stake in Oura for as much as $1.26 billion, according to Oura's latest IPO filing. Read More

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The countdown is on. Save up to $200 and join 10,000+ founders, investors, operators and innovators in San Francisco on October 13-15 for impactful connections, insights, and deal flow. Register by September 25 before savings disappear.

Last but Not Least

Meet the next wave of VCs judging Startup Battlefield 200 at TechCrunch Disrupt 2026: Meet the next wave of VCs judging the Startup Battlefield 200 contenders on the main stage at TechCrunch Disrupt 2026. Register by September 25 at 11:59 p.m. PT, to save up to $200 and to get a front-row seat to one of the most intense startup pitch competitions. Read More