# Guardian Bio funding: rounds and investors

> Guardian Bio has raised $500K across 1 round since 2022. Investors include Y Combinator. Every round with its source.

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

United States · [Pre-seed startup](https://millionrounds.com/companies)

# Who invested in *Guardian Bio*

One round we have observed, with the one investor 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

Y Combinator: S22

Funding summary Updated 26 Oct 2026

**$500K** raised across 1 round since 2022, from 1 source

- **Latest round:** Pre-seed, $500K Aug 2022
- **Investors:** 1

See who backed them

## The rounds

- **Aug 2022** Pre-seed **$500K** [Y Combinator](https://millionrounds.com/fund/y-combinator) Source recorded

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

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

## Also claim to have backed them

These 3 firms list Guardian Bio as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

[Fundament](https://millionrounds.com/fund/fundament) Incubator Per its own site

[Integrity](https://millionrounds.com/fund/integrity) Accelerator Per its own site

[Realm Capital Ventures](https://millionrounds.com/fund/realm-capital-ventures) VC firm Per its own site

## Quick answers about Guardian Bio

### Who invested in Guardian Bio?

Guardian Bio's investors include Y Combinator.

### How much has Guardian Bio raised?

Guardian Bio has raised $500K across 1 round since 2022.

### When did Guardian Bio last raise?

Guardian Bio's most recent round was a Pre-seed of $500K in Aug 2022.

### What was Guardian Bio's biggest round?

Its most recent round, $500K in Aug 2022, is also its largest on record.

### Who backed Guardian Bio first?

Guardian Bio's first round on record, in Aug 2022, was backed by Y Combinator.

### What stage is Guardian Bio at?

Guardian Bio's latest named round is a Pre-seed, in Aug 2022.

### Where is Guardian Bio based?

Guardian Bio is based in the United States.

## Companies like Guardian Bio

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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