# Cactos: Electrical/electronic manufacturing, Kempele, Finland

> Cactos: Cactos is a Finnish energy technology company founded in 2021, focused on developing, manufacturing, and leasing intelligent, cloud-controlled...

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

Finland · [Electrical/electronic manufacturing startup](https://millionrounds.com/companies)

# Cactos

Cactos is a Finnish energy technology company founded in 2021, focused on developing, manufacturing, and leasing intelligent, cloud-controlled distributed battery energy storage systems (BESS).

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Funding reported Last round: Venture (Round not Specified)

Electrical/electronic manufacturing Kempele, Finland

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Company summary

- **Founded:** 2021 5 years old
- **Team:** 86 51 to 200 people
- **Funding reported:** 51.3M as listed, currency not stated
- **Last round:** Venture (Round not Specified) Jun 2026

How sure we are

- ✓ **Listed** We know it exists and what it does
- 2 **Funding reported** A company dataset reports a raise
- 3 **Observed** A filing or a dated announcement confirms a round

No round for Cactos has been confirmed by a filing or an announcement yet, so nothing here counts toward an investor's record. [How we decide](https://millionrounds.com/methodology)

## About Cactos

Cactos is a Finnish energy technology company founded in 2021, focused on developing, manufacturing, and leasing intelligent, cloud-controlled distributed battery energy storage systems (BESS).

The company primarily utilizes recycled electric vehicle (EV) batteries, promoting a circular economy and supporting the global energy transition. Cactos is headquartered in Helsinki, with production facilities in Kempele and a regional office in Amsterdam. Cactos offers a modular energy storage unit called Cactos One, capable of storing up to 100 kW/h of electricity, along with other models for various applications. The company provides leasing and operational services, allowing clients to access energy storage without upfront capital costs. Cactos also engages in energy trading, grid services, and turnkey projects, ensuring efficient energy management and stabilization of the power grid. With solutions delivered to over 400 sites across Finland, Sweden, the Netherlands, and Ukraine, Cactos aims to lead the market in battery energy storage and related services.

## What company datasets say Cactos raised

Funding, as reported

Reported in all **51.3M** in the source's currency

Last round **Venture (Round not Specified)**

Last round size **13.8M**

Last round date **Jun 2026**

Investors listed **5**

## On 2 portfolio pages

Investors who name them

- [Tesi](https://millionrounds.com/fund/tesi)
- [FJ Labs](https://millionrounds.com/fund/fj-labs)

Each firm lists Cactos on its own website. That is the firm's claim, a weaker thing than a round we watched, but a named source.

## The company, in detail

What they build

Known for

hardware ai-driven optimization grid support clean energy & technology ancillary services manufacturing resilient energy systems construction & real estate energy storage renewable energy storage information technology & services cost savings finnish energy solutions energy market participation energy trading batteries

Built with from their website

Wistia Amazon SES Google Tag Manager Amazon CloudFront HREF Lang YouTube Cloudflare DNS Google Workspace CloudFlare Gem

+8 more

Viewport Meta HTTP/3 Amazon Simple Email Service Hubspot GoDaddy Domains IIS Amazon AWS Windows Server

- **Sector:** Electrical/electronic manufacturing
- **Industry code:** NAICS 33331, 33591, 238210, SIC 3631
- **Region:** Northern Ostrobothnia
- **Revenue:** 10M a year, as listed

## Electrical/electronic manufacturing in Finland

Startups like it

- [**Arctic Instruments** Espoo · founded 2024 *Raised*](https://millionrounds.com/company/arctic-instruments)
- [**Revonte** Tampere · founded 2018 *Raised*](https://millionrounds.com/company/revonte)
- [**Cencorp Automation Oy** Kauhava · founded 1978](https://millionrounds.com/startup/cencorp-automation-oy)
- [**European Batteries** Varkaus · founded 2003](https://millionrounds.com/startup/european-batteries)
- [**Rocsole** Kuopio · founded 2012](https://millionrounds.com/startup/rocsole)
- [**Timegate Instruments Ltd.** Oulu · founded 2014](https://millionrounds.com/startup/timegate-instruments-ltd)
- [**CeLLife Technologies Ltd.** Tampere](https://millionrounds.com/startup/cellife-technologies-ltd)
- [**BroadBit Batteries Oy** Espoo · founded 2015](https://millionrounds.com/startup/broadbit-batteries-oy)

## Is this your company?

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