Greylock
About Greylock
Greylock is headquartered in Menlo Park, US. Lounge describes the firm as a venture capital company.
Lounge's deals desk lists Greylock in recent AI rounds, most recent first: Snorkel AI Series E of $350M (2026-09), Upwind Security Growth of $300M (2026-09), and Baseten Series F of $1.5B (2026-07). Greylock led the Oak Seed round of $60M (2026-07), the Altara Seed round of $7M (2026-05) and the Cylake Seed round of $45M (2026-03). It also took part in the District Seed round of $14.7M (2026-05).
Lounge tags the firm with Pre-Seed, Seed and Series A. Individual check sizes are not public in the sources available for this profile.
Investing activity
Greylock appears in 9 AI deals tracked by the AI Lounge deals desk, rounds totalling $2.69B, and led 3 of them. The rounds are mostly Seed, Growth and Series C, with a median round size of $60M and the largest at $1.5B. The most recent are SuperMe (Venture round, $20M, Oct 2026), Upwind Security (Series C, $400M, Oct 2026) and Snorkel AI (Series E, $350M, Sep 2026).
Greylock most often invests alongside Bessemer Venture Partners, Cyberstarts, Salesforce Ventures and Craft Ventures, and the companies it backs on AI Lounge are mostly in AI, AI expert profiles and networks and AI cloud security.
Deals
Frequently asked questions about Greylock
Where is Greylock headquartered?
Greylock is headquartered in Menlo Park, US. Lounge lists the firm as a venture capital company.
Which AI rounds has Greylock led recently?
Lounge's deals desk lists Greylock as lead on the Oak Seed round of $60M (2026-07), the Altara Seed round of $7M (2026-05) and the Cylake Seed round of $45M (2026-03).
Which stages does Greylock invest in?
Lounge tags Greylock with Pre-Seed, Seed and Series A. Its recent AI rounds on the deals desk include Seed rounds and later-stage rounds such as Baseten Series F.
What check sizes does Greylock write for AI startups?
Check sizes are not public in the sources available for this profile. Round sizes for recent AI deals are listed on the Lounge deals desk.
Has Greylock invested in AI infrastructure companies?
Lounge's deals desk lists Greylock in the Baseten Series F of $1.5B (2026-07) and the Snorkel AI Series E of $350M (2026-09).
What AI companies has Greylock invested in?
Greylock's AI investments include SuperMe, Upwind Security, Snorkel AI, Oak, Baseten, District, Altara and Cylake. The 9 rounds on AI Lounge are listed on this page with amounts, dates and co-investors.
Where is Greylock based?
Greylock is based in Menlo Park, US.
What stage does Greylock invest at?
In the rounds tracked on AI Lounge, Greylock has invested at Seed, Growth, Series C and Series E, with a median round of $60M. Greylock led 3 of those rounds.
Who does Greylock co-invest with?
Greylock's most frequent co-investors on AI Lounge are Bessemer Venture Partners (2 deals), Cyberstarts (2 deals), Salesforce Ventures (2 deals), Craft Ventures (2 deals) and TCV (2 deals).
How can founders reach Greylock?
Founders on AI Lounge can see Greylock's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add Greylock to their Investor Pipeline to track the conversation.