United States · Funded startup
8 rounds we have observed, with the 8 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
$119Mraised across 8 rounds since 2004, from 8 sources
Each circle is a round, placed by date and sized by amount. The line above is the running total.
Reported by bizjournals.com
Reported by finsmes.com
Reported by businesswire.com
Reported by venturebeat.com
Reported by thealarmclock.com
The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.
Hummer Winblad Venture Partners
Partech Ventures
Adams Street Partners
Mosaic Capital Par...
Sapphire Ventures
SAP Ventures
City National BankFifth Street Technology PartnersMissing a round, or an investor who was in one? Tell us.
This firm lists Five9 as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.
Five9's investors include Hummer Winblad Venture Partners, Partech Ventures, Adams Street Partners, Mosaic Capital Par... and Sapphire Ventures, and 3 more on record.
Five9 has raised $119M across 8 rounds since 2004.
Five9's most recent round was a Debt of $30M in Mar 2014.
Its most recent round, $30M in Mar 2014, is also its largest on record.
Five9's first round on record, in Apr 2004, was backed by Hummer Winblad Venture Partners.
Five9's latest named round is a Debt, in Mar 2014.
Five9 is based in the United States.
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United States · 