Wall Street Journal reporter Kate Clark posted that Instinct, the viral AI assistant, has already raised $350 million including a new round that values the startup at $2.5 billion according to her report. The linked WSJ article describes the buzzy startup as fundraising at that valuation while promising to handle emails and more, and notes some early users raised privacy concerns over data access. Bret Taylor separately congratulated Noah Shinn and said his path led through Sierra. According to the visible replies, replies on X were evenly split: positive accounts cited heavy personal usage and productivity gains as product-market fit, while negative accounts called the valuation excessive amid competition from other labs.