# Retein funding: rounds and investors

> Retein has raised $1.1M across 1 round since 2023. Investors include Industrifonden, Fly Ventures and Chalmers Ventures AB. Every round with its source.

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

Sweden · [Seed startup](https://millionrounds.com/companies)

# Who invested in *Retein*

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.

Energy

Funding summary Updated 26 Oct 2026

**$1.1M** raised across 1 round since 2023, from 1 source

- **Latest round:** Seed, $1.1M Apr 2023
- **Investors:** 3

See who backed them

## The rounds

- **Apr 2023** Seed **$1.1M** [Industrifonden](https://millionrounds.com/fund/industrifonden) [Fly Ventures](https://millionrounds.com/fund/fly-ventures) [Chalmers Ventures AB](https://millionrounds.com/fund/chalmers-ventures-ab) Source recorded

## Everyone who backed them

[Industrifonden](https://millionrounds.com/fund/industrifonden) VC firm **1** round

[Fly Ventures](https://millionrounds.com/fund/fly-ventures) VC firm **1** round

[Chalmers Ventures AB](https://millionrounds.com/fund/chalmers-ventures-ab) VC firm **1** round

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

## Also claim to have backed them

This firm lists Retein 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.

[Butterfly Ventures](https://millionrounds.com/fund/butterfly-venture) VC firm Per its own site

## Quick answers about Retein

### Who invested in Retein?

Retein's investors include Industrifonden, Fly Ventures and Chalmers Ventures AB.

### How much has Retein raised?

Retein has raised $1.1M across 1 round since 2023.

### When did Retein last raise?

Retein's most recent round was a Seed of $1.1M in Apr 2023.

### What was Retein's biggest round?

Its most recent round, $1.1M in Apr 2023, is also its largest on record.

### Who backed Retein first?

Retein's first round on record, in Apr 2023, was backed by Industrifonden, Fly Ventures and Chalmers Ventures AB.

### What stage is Retein at?

Retein's latest named round is a Seed, in Apr 2023.

### Where is Retein based?

Retein is based in Sweden.

## Companies like Retein

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

[**Elvy** $595M · Oct 2026](https://millionrounds.com/company/elvy)[**Rebaba** $4.6M · Sept 2026](https://millionrounds.com/company/rebaba)[**Tavion** $47M · Sept 2026](https://millionrounds.com/company/tavion)[**Rivus Batteries** $2.9M · Jul 2026](https://millionrounds.com/company/rivus-batteries)[**SeaTwirl** $17M · Sept 2025](https://millionrounds.com/company/seatwirl)[**Nrlyze** $1.0M · Aug 2025](https://millionrounds.com/company/nrlyze)

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