# Opsin Biotherapeutics funding: rounds and investors

> Opsin Biotherapeutics has raised $328K across 1 round since 2023. Investors include MassChallenge and National Institutes of Health.

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

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

# Who invested in *Opsin Biotherapeutics*

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.

Biotech

Funding summary Updated 26 Oct 2026

**$328K** raised across 1 round since 2023, from 1 source

- **Latest round:** Grant, $328K Jul 2023
- **Investors:** 2

See who backed them

## The rounds

- **Jul 2023** Grant **$328K** [MassChallenge](https://millionrounds.com/fund/masschallenge) [National Institutes of Health](https://millionrounds.com/fund/national-institutes-of-health) Source recorded

## Everyone who backed them

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

[National Institutes of Health](https://millionrounds.com/fund/national-institutes-of-health) Government **1** round

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

## Quick answers about Opsin Biotherapeutics

### Who invested in Opsin Biotherapeutics?

Opsin Biotherapeutics's investors include MassChallenge and National Institutes of Health.

### How much has Opsin Biotherapeutics raised?

Opsin Biotherapeutics has raised $328K across 1 round since 2023.

### When did Opsin Biotherapeutics last raise?

Opsin Biotherapeutics's most recent round was a Grant of $328K in Jul 2023.

### What was Opsin Biotherapeutics's biggest round?

Its most recent round, $328K in Jul 2023, is also its largest on record.

### Who backed Opsin Biotherapeutics first?

Opsin Biotherapeutics's first round on record, in Jul 2023, was backed by MassChallenge and National Institutes of Health.

### What stage is Opsin Biotherapeutics at?

Opsin Biotherapeutics's latest named round is a Grant, in Jul 2023.

### Where is Opsin Biotherapeutics based?

Opsin Biotherapeutics is based in the United States.

## Companies like Opsin Biotherapeutics

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

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)

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