# 305 Fitness funding: rounds and investors

> 305 Fitness has raised $377K across 1 round since 2021. Investors include Founders Fund, Gaingels and Sand Hill Angels. Every round with its source.

Source: https://millionrounds.com/company/305-fitness (Millionrounds; every figure on the page links to its filing or article)

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

# Who invested in *305 Fitness*

One round we have observed, with the 3 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.

Fitness

Funding summary Updated 26 Oct 2026

**$377K** raised across 1 round since 2021, from 1 source

- **Latest round:** Debt, $377K Nov 2021
- **Investors:** 3

See who backed them

## The rounds

- **Nov 2021** Debt **$377K** [Founders Fund](https://millionrounds.com/fund/founders-fund) [Gaingels](https://millionrounds.com/fund/gaingels) [Sand Hill Angels](https://millionrounds.com/fund/sand-hill-angels) Source recorded

## Funding filed with regulators

305 Fitness filed one raise, $377K in all. Filings say how much was sold and to how many investors; they never name the investors.

- Nov 2021 **$377K** debt of $1.1M offered Crowdfunding

## Founders and team

From the SEC filings it signed: 3 on the team.

- **Benjamin Kurzban** Executive Officer, Director i
- **Sadie Kurzban** Executive Officer, Director i
- **Samuel Karshenboym** Executive Officer, Director i

On the board, as filed i *Derek Flanzraich* *Sarah Foley*

## Everyone who backed them

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

[Gaingels](https://millionrounds.com/fund/gaingels) Private equity **1** round

[Sand Hill Angels](https://millionrounds.com/fund/sand-hill-angels) Angel network **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=305-fitness).

## Also claim to have backed them

This firm lists 305 Fitness 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.

[New Ground Ventures](https://millionrounds.com/fund/new-ground-ventures) VC firm Per its own site

## Quick answers about 305 Fitness

### Who invested in 305 Fitness?

305 Fitness's investors include Founders Fund, Gaingels and Sand Hill Angels.

### How much has 305 Fitness raised?

305 Fitness has raised $377K across 1 round since 2021.

### When did 305 Fitness last raise?

305 Fitness's most recent round was a Debt of $377K in Nov 2021.

### What was 305 Fitness's biggest round?

Its most recent round, $377K in Nov 2021, is also its largest on record.

### Who backed 305 Fitness first?

305 Fitness's first round on record, in Nov 2021, was backed by Founders Fund, Gaingels and Sand Hill Angels.

### What stage is 305 Fitness at?

305 Fitness's latest named round is a Debt, in Nov 2021.

### Where is 305 Fitness based?

305 Fitness is based in the United States.

## Companies like 305 Fitness

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

[**Bevel** $15M · Sept 2026](https://millionrounds.com/company/bevel)[**Wesper** $18M · Jul 2026](https://millionrounds.com/company/wesper)[**Flawless Aesthetics** $399K · Jun 2026](https://millionrounds.com/company/flawless-aesthetics)[**Fort** $5.0M · Apr 2026](https://millionrounds.com/company/fort)[**WHOOP** $1.3B · Mar 2026](https://millionrounds.com/company/whoop)[**Eight Sleep** $190M · Mar 2026](https://millionrounds.com/company/eight-sleep)

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