California

Sum Ventures

Sum Ventures, based in California, backs Pre-Seed and Seed startups in fintech, proptech, healthtech, and climate, often leading investments.

Entry stagePre-seed, Seed
Check sizen/a
Leads roundsn/a
FocusGeneralist
Latest fundn/a
Investing team3 peopleNo activity since Sep

Who you would pitch at Sum Ventures

3 people on the investing team, 3 of them partners who can make the call. Partners are listed first.

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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.

In their words

SUM Ventures - Investing in Visionary FoundersWe invest in founders at the earliest stages who are working on ideas that create a better future for us all.sum.vc
Founders and investors at a Mode VC gathering

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.

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Alert me when Sum Ventures is active

One email when this firm shows new activity. Nothing else.

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Questions

What stage does Sum Ventures invest in?

Sum Ventures reports entry at pre-seed, seed.

How much does Sum Ventures invest?

Sum Ventures has not reported a check size.

Does Sum Ventures lead rounds?

Sum Ventures has not reported a lead preference.

Who are the partners at Sum Ventures?

Elizabeth Spears (General Partner), Brent Celek (Partner), Raj Khoshoo (Senior Partner).

Is Sum Ventures active right now?

No recent activity since September 2026.

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