The Instinct AI assistant has closed a $250 million Series B round that brings its total funding to $350 million and its valuation to $2.5 billion, an ascent that has unfolded over months and left the startup’s privacy practices under scrutiny as fast as its funding.
The round was co-led by Index Ventures and Benchmark, with Kleiner Perkins joining alongside earlier backers Conviction Partners and Greenoaks, according to Yahoo Finance. The speed of the raise is striking by any measure: TechFundingNews reports the company’s valuation climbed from $50 million to $2.5 billion within a matter of months.
Behind the funding is Noah Shinn, a 23-year-old who left Northeastern University in 2023 and subsequently conducted machine-learning and programming-languages research at both MIT and Northeastern, per WowTale. Before founding Instinct, Shinn worked as a research scientist at Sierra, the enterprise customer-service AI company. He registered Spear Street Technology, the company that offers Instinct, in California in April 2026.
The product itself is a personal AI agent that users connect to their apps and devices and communicate with via SMS, phone calls, or WhatsApp. Its pitch is simple: offload life’s administrative load to an AI. ‘I’m thrilled with everything our early users are doing with Instinct,’ Shinn wrote on Wednesday. ‘They’ve told us they’ve planned cross-country road trips, bought weekly groceries and concert tickets, and cancelled hundreds of dollars of subscriptions. Someone’s even planning their wedding with Instinct.’
Instinct remains in private beta. The enthusiasm is real; so is the competition. Newcomer reports that Index Ventures, even as it co-leads Instinct’s Series B, is simultaneously leading a separate round for Town, a rival enterprise personal-assistant startup that is nearing a $1 billion valuation. Town was founded by former Plaid chief technology officer Jean-Denis Greze and former Google applied AI product director Tony Vincent.
What the Instinct AI Assistant Asks of Its Users
The depth of access Instinct requires is what has unsettled early testers. The app’s terms of service grant a broad, ‘perpetual and irrevocable’ licence to ‘access, use, host, cache, store, reproduce, transmit, display, publish, distribute, and modify’ user materials, including for training AI models. The terms also describe how Instinct can receive screen captures, cursor movements, and keyboard inputs from connected devices.
The terms were revised on 20 August 2026. Under the revised version, as mlq.ai analysed, Instinct is appointed as the user’s agent for agreements, commitments, and transactions, which the document states may be binding as if entered into directly by the user.
The ToS goes further. Spear Street Technology’s terms give Instinct authority to execute binding financial and contractual transactions on behalf of users, while a separate clause explicitly absolves Spear Street of liability for unauthorised transactions or errors generated by the agent.
Testers have already encountered the gap between that language and practice. SC Media reports, citing TechCrunch, that Instinct retained and summarised emails even after access was revoked, that the AI could be easily phished, and that one user found the assistant had sent an email on their behalf without prior consent.
An Opt-Out With Limits
Spear Street does offer a Vault feature that is excluded from AI model training, and users can opt out of training through account settings. The catch, as Vellum.ai notes, is that the opt-out applies only going forward, carries a safety-review exception, and any models already trained on a user’s data remain trained.
For a startup that had not yet formally launched when investors wrote cheques valuing it at $2.5 billion, the privacy questions are now running parallel to the funding story. How Spear Street addresses them, and how regulators respond to an AI agent that can legally bind its users to contracts, may determine whether Instinct’s extraordinary valuation holds as the beta widens.
