Who invested in OneSignal

3 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.

Advertising & AdtechMartech

Y Combinator: S11

Funding summaryUpdated 26 Oct 2026

$27Mraised across 3 rounds since 2015, from 3 sources

$2.0MSeed$25MSeries B

Latest round: VentureJan 2023
Biggest round: $25MSeries B · Jul 2019
Investors: 5 (1 led)

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.

20152017201920212023

$2.0MSeed$25MSeries B?Venture

First round: Seed, $2.0M
Biggest round: $25M
Usual gap between rounds: 4.3 years

The rounds

Jan 2023
VentureAmount undisclosed2 returning
- Y Combinator
- SignalFire
Source recorded
Jul 2019
Series B$25M1 new1 returning
- SignalFireLead
- Rakuten Capital
Reported by Newswire
Apr 2015
Seed$2.0M4 new
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.

Seed2015Series B2019Venture2023

SignalFireL

Y Combinator

Rakuten CapitalJustin KanZach Coelius

Everyone who backed them

SignalFireVC firm2rounds, led 1

Y CombinatorAccelerator2rounds

Rakuten CapitalCorporate VC2rounds

Justin KanVC firm1round

Zach CoeliusVC firm1round

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

Also claim to have backed them

These 2 firms list OneSignal 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.