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Instinct

AI (Personal AI Agent)San Francisco, California, United States

San Francisco-based AI startup behind Instinct, a personal AI agent with no app interface. Users connect it to their email, calendar, messaging and devices and interact by text message or phone call, and it takes real-world actions such as booking travel, shopping and cancelling subscriptions. Operated by Spear Street Technology, Inc. Founded in 2026 by Noah Shinn, a former research scientist at Sierra.

1StartupFox story
2026Founded
AI(Personal AI Agent)Sector
Aug 2026Latest coverage

Funding

Instinct has raised $350M across 3 disclosed rounds.

$350MRaised
$75MLatest round
3Events
RoundAug 2026reported
$250M
InvestorsIndex Ventures, Benchmark
ValuationNot disclosed
Tap any bar to see that round
Not disclosed
Aug 2026Round$75MKleiner Perkins (Mamoon Hamid) Not disclosed
Aug 2026Round$250MIndex Ventures, Benchmark Not disclosed
May 2026Round$25MConviction (Pranav Reddy), Greenoaks (Neil Mehta) Not disclosed

Investor roster

Every disclosed backer and how often they've written a cheque — repeat names are the strongest conviction signal on the cap table.

New · Latest leadKleiner Perkins (Mamoon Hamid)1 round · 2026
Benchmark1 round · 2026
Conviction (Pranav Reddy)1 round · 2026
Greenoaks (Neil Mehta)1 round · 2026
Index Ventures1 round · 2026
Aggregated automatically from the disclosed rounds above.

Leadership

NSNoah ShinnFounder · CEO

The Instinct journey

Apr 2026 · founded
Spear Street Technology, Inc. registered in California by Noah Shinn, a 23-year-old former research scientist at Sierra, to build the Instinct personal AI agent. ↗
May 2026 · funding
Round — $25M at Not disclosed, led by Conviction (Pranav Reddy).
Aug 2026 · funding
Round — $75M at Not disclosed, led by Kleiner Perkins (Mamoon Hamid).
Aug 2026 · funding
Round — $250M at Not disclosed, led by Index Ventures.
Aug 2026 · milestone
Valuation rose from ~$50 million to $2.5 billion in about four months across seed, a $500M-valuation Series A and a $2.5B-valuation Series B, all before public launch; the product drew privacy and security concerns over its data-retention t ↗

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Latest on Instinct

Funding
Viral AI Assistant Instinct Raises $250 Million at a $2.5 Billion Valuation Months After a $50 Million Mark
28 AUG 2026 · 7 MIN READ

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Frequently Asked

What is Instinct?

San Francisco-based AI startup behind Instinct, a personal AI agent with no app interface. Users connect it to their email, calendar, messaging and devices and interact by text message or phone call, and it takes real-world actions such as booking travel, shopping and cancelling subscriptions. Operated by Spear Street Technology, Inc. Founded in 2026 by Noah Shinn, a former research scientist at Sierra.

Who founded Instinct?

Instinct is associated with Noah Shinn.

How much funding has Instinct raised?

Instinct has raised $350M across 3 disclosed rounds. The most recent was a $75M round in Aug 2026.

Who are Instinct's investors?

Disclosed investors in Instinct include Kleiner Perkins (Mamoon Hamid), Index Ventures, Benchmark, Conviction (Pranav Reddy), Greenoaks (Neil Mehta).

What is Instinct's valuation?

Instinct was last reported at Not disclosed, at the time of its round in Aug 2026.

What is the latest news on Instinct?

The most recent StartupFox coverage is “Viral AI Assistant Instinct Raises $250 Million at a $2.5 Billion Valuation Months After a $50 Million Mark” (28 August 2026). All stories are listed on this page.