VendorsOCT 04, 2026

Instinct closes $1B Series C at $10B, agent books half its $1B GMV in travel

Sequoia, Benchmark, and Coatue backed a 4x markup in roughly a month for an invite-only agent that transacts via SMS and phone — a distribution threat for consumer SMBs.

BY GRETA REINHART · ENTERPRISE SAAS

Instinct, the San Francisco personal-agent startup founded by Noah Shinn, closed a $1 billion Series C at a $10 billion post-money valuation on September 28, with Sequoia Capital, Benchmark, and Coatue leading. Crunchbase News called it the largest U.S. venture financing of the week. AI Weekly, citing Reuters, pegged the markup at roughly 4x the $2.5 billion Series B that landed about a month earlier, with that prior round sized at $250 million.

The product launched invite-only in August 2026. It has no app. Users transact by SMS, phone, and email.

On “Invest Like The Best” with Patrick O’Shaughnessy, Shinn said annualized GMV has crossed $1 billion, that more than 50% of transactions are travel-related, and that daily user growth is running at 10% to 11% on zero marketing spend, per TechCrunch and BigGo Finance’s accounts of the interview. Each user gets 5 invite codes; BigGo reports codes clearing around $300 on eBay.

The travel concentration is the structural tell. Shinn described the agent booking a flight, hotel, and rideshare from a single voice note. That workflow rewards vendors with clean inventory APIs and punishes everyone else. A restaurant without an online reservation system, Shinn told TechCrunch, is one the agent will call repeatedly on a user’s behalf, or route around.

Route around is the operative phrase for any consumer business whose acquisition funnel assumes a human doing the browsing. We covered the same dynamic last month in our note on Muse’s App Store debut and the agent shopping threat, when Meta’s Muse topped U.S. app stores on the back of Instagram and Marketplace integration weeks after Instinct’s launch. Two agents, two distribution models, one intermediated consumer.

AI Weekly notes Instinct’s release didn’t disclose revenue, user counts, or how the $1 billion gets deployed. That’s not an oversight; it’s narrative management. The number that matters to Sequoia isn’t ARR. It’s which categories the agent swallows next, and how quickly the vendors inside those categories notice they’ve become inventory.

Sources

About the author

Greta Reinhart

ENTERPRISE SAAS

Greta Reinhart tracks the enterprise software stack from San Francisco — data platforms, AI bundling, seat pricing, and channel checks across the largest SaaS vendors. She files on go-to-market shifts, packaging changes, and quarterly enterprise reads.