# Open Energi funding: rounds and investors

> Open Energi has raised $22M across 3 rounds since 2009. Investors include Low Carbon Accelerator and Ombu Group. Every round with its source.

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

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

# Who invested in *Open Energi*

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.

Cleantech

Funding summary Updated 26 Oct 2026

**$22M** raised across 3 rounds since 2009, from 3 sources

**$300K** Venture **$8.1M** Venture **$13M** Round

- **Latest round:** Round, $13M Jun 2023
- **Step-up i:** 1.6×
- **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.

2009 2011 2013 2015 2017 2019 2021 2023

**$300K** Venture

**$8.1M** Venture

**$13M** Round

- **First round:** Venture, $300K
- **Biggest round:** $13M
- **Usual gap between rounds:** 10.7 years

## The rounds

- **Jun 2023** Round **$13M** No investor was named in the report. Shares issued, filed with Companies House (SH01); no report of this raise yet
- **Oct 2012** Venture **$8.1M** *1 new* [Ombu Group](https://millionrounds.com/fund/ombu-group) Reported by finsmes.com
- **Mar 2009** Venture **$300K** *1 new* [Low Carbon Accelerator](https://millionrounds.com/fund/low-carbon-accelerator) Reported by newenergyworldnetwork.com

## Funding filed with regulators

Open Energi filed one raise, $13M in all. Filings say how much was sold and to how many investors; they never name the investors.

- Jun 2023 **$13M** UK share allotment

## 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.

**Venture** 2009 **Venture** 2012 **Round** 2023 [Low Carbon Accelerator](https://millionrounds.com/fund/low-carbon-accelerator) [Ombu Group](https://millionrounds.com/fund/ombu-group)

## Everyone who backed them

[Low Carbon Accelerator](https://millionrounds.com/fund/low-carbon-accelerator) VC firm **1** round

[Ombu Group](https://millionrounds.com/fund/ombu-group) VC firm **1** round

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

## Quick answers about Open Energi

### Who invested in Open Energi?

Open Energi's investors include Low Carbon Accelerator and Ombu Group.

### How much has Open Energi raised?

Open Energi has raised $22M across 3 rounds since 2009.

### When did Open Energi last raise?

Open Energi's most recent round, $13M, was in Jun 2023.

### What was Open Energi's biggest round?

Its most recent round, $13M in Jun 2023, is also its largest on record.

### Who backed Open Energi first?

Open Energi's first round on record, in Mar 2009, was backed by Low Carbon Accelerator.

### What stage is Open Energi at?

Open Energi's latest named round is a Venture, in Oct 2012.

### Where is Open Energi based?

Open Energi is based in the United Kingdom.

## Companies like Open Energi

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

[**Go Eve** $6.1M · Oct 2026](https://millionrounds.com/company/go-eve)[**Dragonfly Advanced Materials** $2.0M · Sept 2026](https://millionrounds.com/company/dragonfly-advanced-materials)[**Metris Energy** $7.5M · Sept 2026](https://millionrounds.com/company/metris-energy)[**Myriad Wind Energy Systems** $1.8M · Sept 2026](https://millionrounds.com/company/myriad-wind-energy-systems)[**RheEnergise** $6.3M · Sept 2026](https://millionrounds.com/company/rheenergise)[**Rightcharge** $1.4M · Sept 2026](https://millionrounds.com/company/rightcharge)

## Find investors like these

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