# Forum3 funding: rounds and investors

> Forum3 has raised $10M across 1 round since 2022. Investors include Polygon, Arca and Liberty City Ventures. Every round with its source.

Source: https://millionrounds.com/company/forum3 (Millionrounds; every figure on the page links to its filing or article)

United States · [Seed startup](https://millionrounds.com/companies)

# Who invested in *Forum3*

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.

Martech

Funding summary Updated 26 Oct 2026

**$10M** raised across 1 round since 2022, from 1 source

- **Latest round:** Seed, $10M Dec 2022
- **Investors:** 4

See who backed them

## The rounds

- **Dec 2022** Seed **$10M** [Polygon](https://millionrounds.com/fund/polygon) [Arca](https://millionrounds.com/fund/arca) [Liberty City Ventures](https://millionrounds.com/fund/liberty-city-ventures) [Valor Siren Ventures](https://millionrounds.com/fund/valor-siren-ventures) Source recorded

## Founders and team

From Forum3's own website: 2 founders, 3 on the team.

**Adam Brotman** co-founder & CEO

**Andy Sack** Co-Founder & Executive Chairman

- **Mai Pham** Chief Growth Officer
- **Rose Kelly** Chief Strategy Officer
- **Suhail Dutta** Chief Technology Officer

## Everyone who backed them

[Polygon](https://millionrounds.com/fund/polygon) Hedge fund **1** round

[Arca](https://millionrounds.com/fund/arca) VC firm **1** round

[Liberty City Ventures](https://millionrounds.com/fund/liberty-city-ventures) VC firm **1** round

[Valor Siren Ventures](https://millionrounds.com/fund/valor-siren-ventures) Corporate VC **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=forum3).

## Also claim to have backed them

This firm lists Forum3 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.

[Bloccelerate VC](https://millionrounds.com/fund/bloccelerate-vc) VC firm Per its own site

## Quick answers about Forum3

### Who invested in Forum3?

Forum3's investors include Polygon, Arca, Liberty City Ventures and Valor Siren Ventures.

### How much has Forum3 raised?

Forum3 has raised $10M across 1 round since 2022.

### When did Forum3 last raise?

Forum3's most recent round was a Seed of $10M in Dec 2022.

### What was Forum3's biggest round?

Its most recent round, $10M in Dec 2022, is also its largest on record.

### Who backed Forum3 first?

Forum3's first round on record, in Dec 2022, was backed by Polygon, Arca and Liberty City Ventures and 1 others.

### What stage is Forum3 at?

Forum3's latest named round is a Seed, in Dec 2022.

### Where is Forum3 based?

Forum3 is based in the United States.

## Companies like Forum3

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

[**Gradient** $24M · Oct 2026](https://millionrounds.com/company/gradient)[**Different** $48M · Oct 2026](https://millionrounds.com/company/different)[**OuterSignal** $22M · Sept 2026](https://millionrounds.com/company/outersignal)[**Pipedrive** $90M · Sept 2026](https://millionrounds.com/company/pipedrive)[**Clay** $263M · Sept 2026](https://millionrounds.com/company/clay)[**Blee** $21M · Sept 2026](https://millionrounds.com/company/blee)

## Find investors like these

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