# Polybion funding: rounds and investors

> Polybion has raised $4.8M across 1 round since 2021. Investors include MassChallenge and Blue Horizon. Every round with its source.

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

[Series A startup](https://millionrounds.com/companies)

# Who invested in *Polybion*

One round we have observed, with the 2 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.

Energy

Funding summary Updated 26 Oct 2026

**$4.8M** raised across 1 round since 2021, from 1 source

- **Latest round:** Series A, $4.8M Jun 2021
- **Investors:** 2

See who backed them

## The rounds

- **Jun 2021** Series A **$4.8M** [MassChallenge](https://millionrounds.com/fund/masschallenge) [Blue Horizon](https://millionrounds.com/fund/blue-horizon) Source recorded

## Everyone who backed them

[MassChallenge](https://millionrounds.com/fund/masschallenge) Accelerator **1** round

[Blue Horizon](https://millionrounds.com/fund/blue-horizon) Private equity **1** round

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

## Quick answers about Polybion

### Who invested in Polybion?

Polybion's investors include MassChallenge and Blue Horizon.

### How much has Polybion raised?

Polybion has raised $4.8M across 1 round since 2021.

### When did Polybion last raise?

Polybion's most recent round was a Series A of $4.8M in Jun 2021.

### What was Polybion's biggest round?

Its most recent round, $4.8M in Jun 2021, is also its largest on record.

### Who backed Polybion first?

Polybion's first round on record, in Jun 2021, was backed by MassChallenge and Blue Horizon.

### What stage is Polybion at?

Polybion's latest named round is a Series A, in Jun 2021.

## Companies like Polybion

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

[**os.energy** $1.2M · Aug 2026](https://millionrounds.com/company/os-energy)[**CleanMax** $165M · Feb 2026](https://millionrounds.com/company/cleanmax)[**Radiance Renewables** $100M · Feb 2026](https://millionrounds.com/company/radiance-renewables)[**Turno** $4.7M · Feb 2026](https://millionrounds.com/company/turno)[**e-TRNL Energy** $3.0M · Feb 2026](https://millionrounds.com/company/e-trnl-energy)[**PolyCycl** $2.9M · Jan 2026](https://millionrounds.com/company/polycycl)

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