Who invested in opendorse

4 rounds we have observed, with the 9 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.

Advertising & AdtechMartech

Raised 9 months ago

Funding summaryUpdated 26 Oct 2026

$7.7Mraised across 4 rounds since 2013, from 4 sources

$300KSeed$1.8MSeries A$3.5MSeries A$2.1MVenture

Latest round: Venture, $2.1MFeb 2026
Biggest round: $3.5MSeries A · Nov 2017
Investors: 9

See who backed them

The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2013201520172019202120232025

$300KSeed$1.8MSeries A$3.5MSeries A$2.1MVenture

First round: Seed, $300K
Biggest round: $3.5M
Usual gap between rounds: 2.6 years

The rounds

Feb 2026
Venture$2.1M3 new
Source recordedSEC filing: $2.1M sold, first sale Feb 2026
Nov 2017
Series A$3.5M5 new
- Dan Mannix
- Peter Gardiner
- Prince Amukamara
- Sean Bratches
- Serra Ventures/ Flyover
Reported by FinSMEs
Apr 2015
Series A$1.8M1 new
- Flyover Capital
From a historical funding record
Jun 2013
Seed$300K
No investor was named in the report.
From a historical funding record

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.

Seed2013Series A2015Series A2017Venture2026

Serra Ventures

Advantage Capital

Invest Nebraska

Flyover CapitalDan MannixPeter GardinerPrince AmukamaraSean BratchesSerra Ventures/ Flyover

Everyone who backed them

Serra VenturesVC firm1round

Advantage CapitalCorporate VC1round

Invest NebraskaGovernment1round

Flyover CapitalVC firm1round

Dan Mannixno record of our own yet1round

Peter Gardinerno record of our own yet1round

Prince Amukamarano record of our own yet1round

Sean Bratchesno record of our own yet1round

Serra Ventures/ Flyoverno record of our own yet1round

Missing a round, or an investor who was in one? Tell us.

Also claim to have backed them

These 3 firms list opendorse as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.