United States · Series A startup

Who invested in Riff

3 rounds we have observed, with the 4 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.

Cleantech

Funding summaryUpdated 26 Oct 2026

$19Mraised across 3 rounds since 2021, from 3 sources

$2.5MSeed$500KPre-seed$16MSeries A
Latest round
Series A, $16MOct 2025
Step-upi
32.4×
Investors
4
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.

2022202320242025
$2.5MSeed$500KPre-seed$16MSeries A
First round
Seed, $2.5M
Nov 2021
Biggest round
$16M
Series A · Oct 2025
Between rounds
3.8 years
from the last two

The rounds

  1. Oct 2025
    Series A$16M3 new

    Source recorded

  2. Sept 2025
    Pre-seed$500K1 new

    Source recorded

  3. Nov 2021
    Seed$2.5M

    No investor was named in the report.

    Source recorded

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.

Everyone who backed them

Y CombinatorAccelerator1round
NorthzoneVC firm1round
CapitalOvenVC firm1round

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

Also claim to have backed them

This firm lists Riff 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.

Sondo CapitalVC firmPer its own site

Quick answers about Riff

Who invested in Riff?

Riff's investors include Y Combinator, Global Founders Capital, Northzone and CapitalOven.

How much has Riff raised?

Riff has raised $19M across 3 rounds since 2021.

When did Riff last raise?

Riff's most recent round was a Series A of $16M in Oct 2025.

What was Riff's biggest round?

Its most recent round, $16M in Oct 2025, is also its largest on record.

Who backed Riff first?

Riff's first round on record, in Sept 2025, was backed by Y Combinator.

What stage is Riff at?

Riff's latest named round is a Series A, in Oct 2025.

Where is Riff based?

Riff is based in the United States.

Companies like Riff

In the same sector, and raised in the last eighteen months.

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