AI assistant startup Instinct has completed a $250 million Series B financing round co-led by Index Ventures and Benchmark, bringing its total funding to $350 million and valuing the company at $2.5 billion. Founded in 2024 by 23-year-old Noah Shinn, Instinct is developing an AI assistant that connects to users’ apps and devices to handle tasks including itinerary planning, shopping, and subscription cancellations through text and voice. The product remains in closed beta and has drawn controversy over its permission requests and privacy terms.