Instinct's AI assistant is worth $10 billion now, four times last month's price -- its own rewritten privacy terms show what actually changed

$10B (Instinct's valuation as of Sept. 28 -- four times what it was a month earlier) Sequoia Capital, Benchmark and Coatue closed a $1 billion Series C in the personal-AI-assistant startup on Sunday, pricing the company at four times its worth just thirty days ago. The startup, formally registered as Spear Street Technology in April, has raised roughly $1.35 billion in under six months without disclosing a user count, a revenue figure, or a retention number at any stage. The number the market is pricing is the shape of an opportunity, not a measured result.

Sunday's round came from Noah Shinn, a former Sierra research scientist who founded the company and put its pitch plainly in the funding announcement: the product is a service reachable only by text or phone call, with no app to open, that plans trips, cancels subscriptions, books tables and orders groceries by operating a phone and a computer the way a person would. It still runs invite-only.

“We're building Instinct to be the best personal agent that can handle the deeply personal nuances of everyday life.” — Noah Shinn, Instinct founder, Sept. 28, 2026

The product itself kept moving alongside the money. Recent additions include Instinct Concierge, a white-glove tier for complex requests like restaurant reservations or dental-appointment changes, and a 'trusted person network' that lets separate users' assistants coordinate directly -- scheduling around each other's calendars without either person relaying details by hand. None of that functionality has been independently tested for the same phishing and data-retention issues raised about the original product, and Instinct hasn't said whether the underlying access model changed along with the terms of service.

The pace is the story now as much as the product. A month earlier, Instinct's $250 million Series B priced the company at $2.5 billion -- itself five times its Series A price three weeks before that -- while named early users were publicly documenting a phishing hole, an email the assistant sent without approval, and inbox data that persisted after they'd disconnected the service. Neither price came with a published user, revenue, or retention figure.

The scrutiny that came with the August round centered on what Instinct's assistant can see and keep: email, messages, screen contents, audio, location, and -- because the assistant operates the phone and computer directly -- keystrokes and passwords for connected third-party accounts. TechCrunch reported at the time that the original terms of service granted the company a 'perpetual and irrevocable' license to that material, sub-licensable and transferable, with no stated path to withdraw it once the license attached.

Instinct's current terms of service, last revised Aug. 26, no longer contain that language. The document now describes users' rights, not the company's: a "personal, non-assignable, non-sublicensable, non-transferrable, and non-exclusive right and license," with the company stating it "does not claim any ownership" in user materials. The company may still use that material to "develop, provide, maintain and improve the Services ... including training AI models," and users can now opt out at a dedicated settings page -- with one exception: material "flagged for safety review" is used for training regardless of the opt-out setting. A separate 'Vault' feature is the one place Instinct says training never applies.

What the rewrite doesn't resolve is the boundary the earlier reporting flagged hardest: the assistant watches the screen directly, and Instinct's documentation gives no revocation path for material already captured that way. Disconnecting a linked account, as one early user found when cutting off Google access, did not retroactively delete inbox summaries the assistant had already generated and stored. The one hard exemption in the current privacy policy is data arriving through Google Workspace's own APIs -- a carve-out that exists because Google's developer terms require it as a condition of the integration, not because Instinct volunteered it.

The competitive backdrop raises the stakes on that pricing. Meta's Muse assistant, chasing the same 'agent that runs your life' niche, already claims tens of millions of downloads backed by a company that doesn't need a Series C to survive a slow quarter -- a rival Instinct cannot outspend, only try to out-focus. What has to be true for a $10 billion price to make sense with no revenue disclosed is that investors are pricing the category, not this company's traction inside it: a bet that an always-on agent people trust with their inbox and calendar becomes as durable a habit as search or messaging once was. (The same bet is why Meta, OpenAI and Google are all racing to ship their own version of the same idea -- Instinct's edge, for now, is that it has no other product competing for the same engineering time.)

30 days from a $2.5 billion price to $10 billion is not a pace that leaves room for a slower, metric-by-metric case to have been made in between. Whether that's rational pricing of where personal agents are headed, or another marking of a category still running mostly on narrative, is the open question the next round -- whenever it comes -- will answer either way.