# Sustain funding: rounds and investors

> Sustain has raised across 3 rounds since 2013. Investors include The R-Group, LLC and Circle Up. Every round with its source.

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

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

# Who invested in *Sustain*

3 rounds we have observed, with the 2 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

E-commerce

Funding summary Updated 26 Oct 2026

**Undisclosed** raised across 3 rounds since 2013, from 3 sources

- **Latest round:** Venture Nov 2018
- **Investors:** 2

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2014 2015 2016 2017 2018

**?** Seed

**?** Round

**?** Venture

- **First round:** Seed
- **Usual gap between rounds:** 2.9 years

## The rounds

- **Nov 2018** Venture **Amount undisclosed** *1 new* [Circle Up](https://millionrounds.com/fund/circle-up) Source recorded SEC filing: $2.5M sold, first sale Dec 2018
- **Dec 2015** Round **Amount undisclosed** *1 returning* [The R-Group, LLC](https://millionrounds.com/fund/the-r-group-llc) From a historical funding record
- **Aug 2013** Seed **Amount undisclosed** *1 new* [The R-Group, LLC](https://millionrounds.com/fund/the-r-group-llc) From a historical funding record

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Seed** 2013 **Round** 2015 **Venture** 2018 [The R-Group, LLC](https://millionrounds.com/fund/the-r-group-llc) [Circle Up](https://millionrounds.com/fund/circle-up)

## Everyone who backed them

[The R-Group, LLC](https://millionrounds.com/fund/the-r-group-llc) Family office **2** rounds

[Circle Up](https://millionrounds.com/fund/circle-up) Hedge fund **1** round

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

## Also claim to have backed them

This firm lists Sustain 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.

[Seyen Capital](https://millionrounds.com/fund/seyen-capital) VC firm Per its own site

## Quick answers about Sustain

### Who invested in Sustain?

Sustain's investors include The R-Group, LLC and Circle Up.

### How much has Sustain raised?

Sustain has raised 3 rounds since 2013, none with a disclosed amount.

### When did Sustain last raise?

Sustain's most recent round was a Venture in Nov 2018.

### Who backed Sustain first?

Sustain's first round on record, in Aug 2013, was backed by The R-Group, LLC.

### What stage is Sustain at?

Sustain's latest named round is a Venture, in Nov 2018.

### Where is Sustain based?

Sustain is based in the United States.

## Companies like Sustain

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

[**Whop** $400M · Oct 2026](https://millionrounds.com/company/whop)[**Rosie** $7.0M · Oct 2026](https://millionrounds.com/company/rosie)[**Stord** $782M · Oct 2026](https://millionrounds.com/company/stord)[**Santé** $23M · Oct 2026](https://millionrounds.com/company/sante)[**Siena AI** $23M · Oct 2026](https://millionrounds.com/company/siena-ai)[**Relay** $207M · Oct 2026](https://millionrounds.com/company/relay)

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