California
JAM Fund
JAM Fund is a California-based generalist investor backing Pre-Seed and Seed startups, with notable investments including Lyft and Brex, and can lead or follow rounds.
Entry stagePre-seed, Seed
Check sizen/a
Leads roundsn/a
FocusGeneralist
Latest fundn/a
Investing team1 peopleNo activity since Sep
Who you would pitch at JAM Fund
1 person on the investing team, 1 of them partners who can make the call. Partners are listed first.
Work here and something is wrong? Ask for a correction.
Check size not reported yet.
Bars: how many firms in the atlas report each band. Highlighted: this firm.No recent activity since September 2026. Quiet does not mean closed.
Weekly count of activity updates. Activity is not a confirmed deal.Notable investments
LyftBrexDeelCompass PathwaysAlto PharmacyDaily HarvestFabFitFun
Send Mode VC your deck
Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
Send your deckAlert me when JAM Fund is active
One email when this firm shows new activity. Nothing else.
On these lists
Questions
What stage does JAM Fund invest in?
JAM Fund reports entry at pre-seed, seed.
How much does JAM Fund invest?
JAM Fund has not reported a check size.
Does JAM Fund lead rounds?
JAM Fund has not reported a lead preference.
Who are the partners at JAM Fund?
Justin Mateen (Founder).
Is JAM Fund active right now?
No recent activity since September 2026.
Work at JAM Fund? Claim or correct this profile.