# Protonet funding: rounds and investors

> Protonet has raised $7.2M across 4 rounds since 2012. Investors include Y Combinator and Christopher Isak. Every round with its source.

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

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

# Who invested in *Protonet*

4 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.

Cloud

Y Combinator: W16

Funding summary Updated 26 Oct 2026

**$7.2M** raised across 4 rounds since 2012, from 4 sources

**$265K** Seed **$1.2M** Seed **$4.1M** Crowdfunding **$1.6M** Venture

- **Latest round:** Venture, $1.6M Jun 2016
- **Biggest round:** $4.1M Crowdfunding · Jun 2014
- **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.

2013 2014 2015 2016

**$265K** Seed

**$1.2M** Seed

**$4.1M** Crowdfunding

**$1.6M** Venture

- **First round:** Seed, $265K
- **Biggest round:** $4.1M
- **Usual gap between rounds:** 11 months

## The rounds

- **Jun 2016** Venture **$1.6M** *1 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) Source recorded SEC filing: $1.6M sold, first sale Jun 2016
- **Jun 2014** Crowdfunding **$4.1M** *1 new* [Christopher Isak](https://millionrounds.com/fund/christopher-isak) From a historical funding record
- **Jul 2013** Seed **$1.2M** No investor was named in the report. Reported by venturevillage.eu
- **Nov 2012** Seed **$265K** No investor was named in the report. 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** 2012 **Seed** 2013 **Crowdfunding** 2014 **Venture** 2016 [Y Combinator](https://millionrounds.com/fund/y-combinator) [Christopher Isak](https://millionrounds.com/fund/christopher-isak)

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

[Christopher Isak](https://millionrounds.com/fund/christopher-isak) Angel **1** round

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

## Quick answers about Protonet

### Who invested in Protonet?

Protonet's investors include Y Combinator and Christopher Isak.

### How much has Protonet raised?

Protonet has raised $7.2M across 4 rounds since 2012.

### When did Protonet last raise?

Protonet's most recent round was a Venture of $1.6M in Jun 2016.

### What was Protonet's biggest round?

Protonet's largest round on record is $4.1M (Crowdfunding), in Jun 2014.

### Who backed Protonet first?

Protonet's first round on record, in Jun 2014, was backed by Christopher Isak.

### What stage is Protonet at?

Protonet's latest named round is a Venture, in Jun 2016.

### Where is Protonet based?

Protonet is based in Germany.

## Companies like Protonet

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

[**BLOCKS** $6.6M · Apr 2026](https://millionrounds.com/company/blocks)[**troy** Nov 2025](https://millionrounds.com/company/troy)[**Unikraft** $6.0M · Oct 2025](https://millionrounds.com/company/unikraft)[**aedifion** $20M · Jun 2025](https://millionrounds.com/company/aedifion)[**Cerabyte** May 2025](https://millionrounds.com/company/cerabyte)[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)

## Find investors like these

Search every investor by what they have actually funded, then narrow to your stage and market. Free.

Open the investor searchOr these rounds in the app