# Untether Labs funding: rounds and investors

> Untether Labs has raised $500K across 1 round since 2023. Investors include Y Combinator and Rebel Fund. Every round with its source.

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

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

# Who invested in *Untether Labs*

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.

Healthcare

Y Combinator: W23

Funding summary Updated 26 Oct 2026

**$500K** raised across 1 round since 2023, from 1 source

- **Latest round:** Pre-seed, $500K Apr 2023
- **Investors:** 2

See who backed them

## The rounds

- **Apr 2023** Pre-seed **$500K** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Rebel Fund](https://millionrounds.com/fund/rebel-fund) Source recorded

## Everyone who backed them

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

[Rebel Fund](https://millionrounds.com/fund/rebel-fund) VC firm **1** round

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

## Also claim to have backed them

These 2 firms list Untether Labs 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.

[Maiora Ventures](https://millionrounds.com/fund/maiora-ventures) VC firm Per its own site

[Opal Ventures](https://millionrounds.com/fund/opal-ventures) VC firm Per its own site

## Quick answers about Untether Labs

### Who invested in Untether Labs?

Untether Labs's investors include Y Combinator and Rebel Fund.

### How much has Untether Labs raised?

Untether Labs has raised $500K across 1 round since 2023.

### When did Untether Labs last raise?

Untether Labs's most recent round was a Pre-seed of $500K in Apr 2023.

### What was Untether Labs's biggest round?

Its most recent round, $500K in Apr 2023, is also its largest on record.

### Who backed Untether Labs first?

Untether Labs's first round on record, in Apr 2023, was backed by Y Combinator and Rebel Fund.

### What stage is Untether Labs at?

Untether Labs's latest named round is a Pre-seed, in Apr 2023.

### Where is Untether Labs based?

Untether Labs is based in the United States.

## Companies like Untether Labs

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)[**AI** $18M · Oct 2026](https://millionrounds.com/company/ai)[**Baba** $40M · Oct 2026](https://millionrounds.com/company/baba)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)

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