United States · 
Who invested in Zerostack?
Zerostack's investors include Foundation Capital and Formation 8.
201520172019202120232025
$5.6MSeries A$16MSeries B$1.0BRound
United States · Series B startup
Who invested in Zerostack
Funding summaryUpdated 26 Oct 2026
$1.0Braised across 3 rounds since 2015, from 4 sources
$5.6MSeries A$16MSeries B$1.0BRound
- Latest round
- Round, $1.0BSept 2026
- Step-upi
- 62.5×
- Investors
- 2
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Series A, $5.6M Aug 2015
- Biggest round
- $1.0B Round · Sept 2026
- Usual gap between rounds
- 10.8 years the median of 2
The rounds
- Sept 2026Round$1.0B
No investor was named in the report.
Filed with the SEC (Form D); no report of this raise yet and 1 otherSEC filing: $1.0B sold, first sale Sept 2026
- Oct 2015
- Aug 2015
Who was in which round
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Everyone who backed them
Missing a round, or an investor who was in one? Tell us.
Quick answers about Zerostack
How much has Zerostack raised?
Zerostack has raised $1.0B across 3 rounds since 2015.
When did Zerostack last raise?
Zerostack's most recent round, $1.0B, was in Sept 2026.
What was Zerostack's biggest round?
Its most recent round, $1.0B in Sept 2026, is also its largest on record.
Who backed Zerostack first?
Zerostack's first round on record, in Aug 2015, was backed by Foundation Capital.
What stage is Zerostack at?
Zerostack's latest named round is a Series B, in Oct 2015.
Where is Zerostack based?
Zerostack is based in the United States.
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