;
Angels
- Alexander Elenski
- Azeem Azhar
- James Bilefield
- Christian Carrillo
- Pawel Chudzinski
- Heller Ehrmann (VLG)
- Patrick Fauchier
- Jonathan Finn
- The Forsyth Group
- Ahti Heinla
- Lars Hinrichs
- Klaus Hommels
- Alex Hoye
- Christoph Janz
- Thomas Jones
- Bo Kieffer
- Ari Korhonen
- Tim Levene
- Christopher Muenchhoff
- John Pfeffer
- Max Polyakov
- Sanjeev Shah
- Nadim Saad
- Victor Saad
- Anton Wellenreiter
- Anil Hansjee
;
Institutional Investors
- 360 Capital
- ACT Venture Capital
- Anthemis Group
- Atlas Ventures
- Atomico
- Balderton Capital
- Bertelsman Digital Media Investments
- Brown Rudnick
- Doughty Hanson
- DN Capital
- Eden Ventures
- Estag Capital AG
- FoundersLink
- GIMV
- HENQ Invest
- Index Ventures
- NESTA
- Northzone
- Notion Capital
- Reed Elsevier Ventures
- Samos Investments
- The Accelerator Group (TAG)
- Venrex Investment Management
- Yandex
;
