Who invested in Zumbox?
Zumbox's investors include Shelter Capital Partners, Michael Eisner, Rick Braddock, Computershare and Bill Guthy, and 1 more on record.
United States · Series C startup
Funding summaryUpdated 26 Oct 2026
$28Mraised across 4 rounds since 2008, from 4 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
No investor was named in the report.
Reported by venturebeat.comSEC filing: $9.7M sold, first sale Dec 2010
Reported by sec.govSEC filing: $5.0M sold, first sale Dec 2008
From the SEC filings it signed: 6 on the team.
On the board, as filediAlex TischBertram Zweig
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Zumbox's investors include Shelter Capital Partners, Michael Eisner, Rick Braddock, Computershare and Bill Guthy, and 1 more on record.
Zumbox has raised $28M across 4 rounds since 2008.
Zumbox's most recent round was a Series C of $11M in Jul 2012.
Its most recent round, $11M in Jul 2012, is also its largest on record.
Zumbox's first round on record, in Dec 2009, was backed by Shelter Capital Partners, Michael Eisner and Rick Braddock and 1 others.
Zumbox's latest named round is a Series C, in Jul 2012.
Zumbox is based in the United States.
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