AI agent startup Instinct raises $1B at a $10B valuation

Instinct, a San Francisco startup building AI agents that run your errands over text message, has raised $1 billion in a Series C round. The deal, completed on September 28, 2026, gives the company a post-money valuation of $10 billion. Just weeks before this raise, Instinct’s previous funding round valued it at $2.5 billion. A fourfold jump in valuation over a few weeks is the kind of trajectory most startups only see in pitch decks. The details of the raise Sequoia Capital, Benchmark Capital and Coatue led the Series C. That is a heavyweight lineup for a company that opened its consumer product to the public only recently, and only by invitation. Instinct launched one year before this funding announcement. The company rolled out an invite-only consumer service in August 2026. In other words, the $10 billion valuation arrived roughly a month after regular people could start trying the product, and only the ones who got an invite. The $1 billion raised represents a tenth of the post-money valuation, which means investors bought into the company at a $9 billion pre-money price. The company’s implied worth climbed by several billion dollars between two funding rounds separated by wee...