United States · Series D startup
6 rounds we have observed, with the 5 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.
Funding summaryUpdated 26 Oct 2026
$36Mraised across 6 rounds since 2004, from 6 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
From a historical funding record
From a historical funding record
From a historical funding record
No investor was named in the report.
From a historical funding record
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
InterWest PartnersLeapfrog Ventures
Mayfield FundCrosspoint Venture PartnersOutfitter VenturesFrom historical deal records. Wrong? Tell us.
Missing a round, or an investor who was in one? Tell us.
C9 Inc.'s investors include InterWest Partners, Leapfrog Ventures, Mayfield Fund, Crosspoint Venture Partners and Outfitter Ventures.
C9 Inc. has raised $36M across 6 rounds since 2004. One round did not disclose an amount, so the total is a floor.
C9 Inc.'s most recent round was a Series D of $12M in Sept 2013.
Its most recent round, $12M in Sept 2013, is also its largest on record.
C9 Inc.'s first round on record, in Sept 2005, was backed by InterWest Partners, Leapfrog Ventures and Crosspoint Venture Partners and 1 others.
C9 Inc.'s latest named round is a Series D, in Sept 2013.
C9 Inc. is based in the United States.
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United States ·