United States · 
Who invested in First.io?
First.io's investors include MATH Venture Partners, Nine Four Ventures, Mike Golden and Thad Wong.
United States · Series A startup
Who invested in First.io
One round we have observed, with the 4 investors named in it. 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
$5.0Mraised across 1 round since 2018, from 1 source
- Latest round
- Series A, $5.0MMay 2018
- Investors
- 4
The rounds
- May 2018
Everyone who backed them
Mike Goldenno record of our own yet1round
Thad Wongno record of our own yet1round
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Quick answers about First.io
How much has First.io raised?
First.io has raised $5.0M across 1 round since 2018.
When did First.io last raise?
First.io's most recent round was a Series A of $5.0M in May 2018.
What was First.io's biggest round?
Its most recent round, $5.0M in May 2018, is also its largest on record.
Who backed First.io first?
First.io's first round on record, in May 2018, was backed by MATH Venture Partners, Nine Four Ventures and Mike Golden and 1 others.
What stage is First.io at?
First.io's latest named round is a Series A, in May 2018.
Where is First.io based?
First.io is based in the United States.
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