Japan · Seed startup

Who invested in Atom

4 rounds we have observed, with the 11 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.

AIGenerative AI

Raised 6 months ago

Funding summaryUpdated 26 Oct 2026

$22Mraised across 4 rounds since 2015, from 4 sources

$3.4MSeed$19MSeed
Latest round
Seed, $19MMay 2026
Step-upi
5.5×
Investors
11
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.

201520172019202120232025
?Venture$3.4MSeed?Venture$19MSeed
First round
Venture
Feb 2015
Biggest round
$19M
Seed · May 2026
Usual gap between rounds
3.4 years
the median of 3

The rounds

  1. May 2026
    Seed$19M5 new

    Source recorded

  2. Dec 2022
    VentureAmount undisclosed3 new

    Source recorded

  3. Sept 2021
    Seed$3.4M2 new

    Source recorded

  4. Feb 2015
    VentureAmount undisclosed1 new

    From a historical funding record

Founders and team

From Atom's own website: 2 founders.

Tyler HayesCo-founder, CEO Learn more
Eric MonsefCo-founder, CTO Learn more

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.

Venture2015Seed2021Venture2022Seed2026TechstarsNational Science FoundationMitsubishi UFJ CapitalSMBC Venture CapitalM12Village GlobalMucker CapitalANRIJIC Venture Growth InvestmentsBeyond Next Ventures

Everyone who backed them

TechstarsVC firm1round
National Science FoundationGovernment1round
Mitsubishi UFJ CapitalVC firm1round
SMBC Venture CapitalInvestment bank1round
M12Corporate VC1round
Village GlobalVC firm1round
Mucker CapitalVC firm1round
ANRIVC firm1round
JIC Venture Growth InvestmentsVC firm1round
Beyond Next VenturesAccelerator1round
Meyer GlobalInvestment firm1round

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

Also claim to have backed them

This firm lists Atom 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.

CM VenturesVC firmPer its own site

Quick answers about Atom

Who invested in Atom?

Atom's investors include Techstars, National Science Foundation, Mitsubishi UFJ Capital, SMBC Venture Capital and M12, and 6 more on record.

How much has Atom raised?

Atom has raised $22M across 4 rounds since 2015. 2 rounds did not disclose an amount, so the total is a floor.

When did Atom last raise?

Atom's most recent round was a Seed of $19M in May 2026.

What was Atom's biggest round?

Its most recent round, $19M in May 2026, is also its largest on record.

Who backed Atom first?

Atom's first round on record, in Feb 2015, was backed by M12.

What stage is Atom at?

Atom's latest named round is a Seed, in May 2026.

Where is Atom based?

Atom is based in Japan.

Companies like Atom

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

Kaminashi$14M · Oct 2026Mujin, Inc.$224M · Oct 2026Flyle$13M · Oct 2026Farmnote$12M · Oct 2026PeopleX$39M · Sept 2026AIONA$1.2M · Sept 2026

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