Seth Rosenberg is a partner at Greylock focused on early-stage fintech and AI startups. He previously worked at Facebook as a product manager, helping launch Messenger and the AI bot platform.
What Seth can write
Greylock writes $1M to $30M+ checks, larger than 83% of firms in the atlas.
Bars: how many firms report each check band. Highlighted: Greylock.Career
- Facebook · product manager
- Greylock · PartnerNow
- Goldman Sachs
Investments named in public bios
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Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
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Who is Seth Rosenberg?
Seth Rosenberg is a partner at Greylock focused on early-stage fintech and AI startups. He previously worked at Facebook as a product manager, helping launch Messenger and the AI bot platform.
How much does Seth Rosenberg invest?
Seth Rosenberg invests through Greylock, which writes checks of $1M to $30M+ at seed, series a.
How do I pitch Seth Rosenberg?
Email [email protected], the firm's inbox for founders, and name Seth in the subject. A warm intro from a founder Greylock backed works better.
What did Seth Rosenberg do before Greylock?
product manager at Facebook; Goldman Sachs.
Last updated 2026-10-15. Is this you? Ask for a correction.