United States · 
Who invested in SumZero?
SumZero's investors include Winklevoss Capital.
United States · Seed startup
Who invested in SumZero
One round we have observed, with the one investor named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
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Funding summaryUpdated 31 Oct 2026
$1.0Mraised across 1 round since 2012, from 1 source
- Latest round
- Seed, $1.0MSept 2012
- Investors
- 1
The rounds
- Sept 2012
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about SumZero
How much has SumZero raised?
SumZero has raised $1.0M across 1 round since 2012.
When did SumZero last raise?
SumZero's most recent round was a Seed of $1.0M in Sept 2012.
What was SumZero's biggest round?
Its most recent round, $1.0M in Sept 2012, is also its largest on record.
Who backed SumZero first?
SumZero's first round on record, in Sept 2012, was backed by Winklevoss Capital.
What stage is SumZero at?
SumZero's latest named round is a Seed, in Sept 2012.
Where is SumZero based?
SumZero is based in the United States.
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