United States · 
Who invested in Sustain?
Sustain's investors include The R-Group, LLC and Circle Up.
20142015201620172018
?Seed?Round?VentureUnited States · Venture startup
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.
Funding summaryUpdated 26 Oct 2026
Undisclosedraised across 3 rounds since 2013, from 3 sources
- Latest round
- VentureNov 2018
- Investors
- 2
The funding story
Each circle is a round, placed by date and sized by amount. The line above is the running total.
- First round
- Seed Aug 2013
- Usual gap between rounds
- 2.9 years the median of 2
The rounds
- Nov 2018
- Dec 2015
- Aug 2013
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.
Everyone who backed them
The R-Group, LLCFamily office2rounds
Missing a round, or an investor who was in one? Tell us.
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.
Quick answers about Sustain
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.
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