Angel investor based in Helsinki, Finland.
8 companies backed across
9 recorded rounds, Mar 2015 – Jul 2025.
Founder WithSecure, F-Secure, Co-Founder Nexit Ventures, ex-Co-Founder Finnish Software Entrepreneurs Association, Nokia, Elisa, Fruit. Aalto University MSc 1985, 2018
Sectors of the companies in the portfolio, by company count.
Head-office city of the companies in the portfolio.
Rounds by stage.
Total size of the rounds they joined — an angel's own cheque is a share of this, and is not disclosed.
Every company Risto Siilasmaa appears as an investor in, most recent round first.
| Company | City | Sectors | Latest round | Rounds | Round value |
|---|---|---|---|---|---|
| Donut Lab | Espoo | Electric VehiclesGreen TransportEV Powertrain Systems | Seed Jul 2025 | 1 | $29.3M |
| Inven | Helsinki | Data as a ServiceInvestment TechPrivate Market Intelligence | Series A May 2025 | 1 | $12.7M |
| Aito | Vantaa | Application Development ToolsBusiness IntelligenceArtificial Intelligence | Seed May 2019 | 1 | $1.4M |
| Aiven | Helsinki | Database TechnologyOpen SourceBig Data Infrastructure | Series A May 2019 | 1 | $10M |
| Meeshkan | Helsinki | API ManagementSoftware Testing ToolsArtificial Intelligence | Seed Dec 2018 | 1 | $418.1K |
| HoxHunt | Helsinki | Cybersecurity | Series A Oct 2018 | 1 | $2.9M |
| Wolt | Helsinki | Food TechLogistics TechFood Delivery | Series B Apr 2016 | 2 | $13.1M |
| Detectify | Stockholm | CybersecurityDevSecOpsVulnerability Assessment | Seed Mar 2015 | 1 | $1.7M |
Investors that appear in the same rounds. Two names in one round is what "invested together" means here — it is not a claim about a relationship off the cap table.
| Investor | Type | Based | Shared rounds | Shared companies |
|---|---|---|---|---|
| Lifeline Ventures | Firm | Helsinki | 3 | 3 |
| Inventure | Firm | Helsinki | 2 | 2 |
| Ilkka Paananen | Angel | 2 | 1 | |
| Vendep Capital | Firm | Espoo | 1 | 1 |
| Nicholas Coleman | Angel | Denver | 1 | 1 |
| Ventech | Firm | Paris | 1 | 1 |
| Hannu Turunen | Angel | 1 | 1 | |
| Joint Effects | Firm | Boston | 1 | 1 |
| Niklas Zennstrom | Angel | London | 1 | 1 |
| Business Finland | Firm | Helsinki | 1 | 1 |
| Futuristic | Firm | Copenhagen | 1 | 1 |
| EQT Ventures | Firm | Stockholm | 1 | 1 |
| Paua Ventures | Firm | Berlin | 1 | 1 |
| Christian Jantzen | Angel | Copenhagen | 1 | 1 |
| Dawn Capital | Firm | London | 1 | 1 |
| Pii Ketvel | Angel | 1 | 1 | |
| Earlybird | Firm | Berlin | 1 | 1 |
| Poju Zabludowicz | Angel | 1 | 1 | |
| First Fellow Partners | Firm | Helsinki | 1 | 1 |
| henQ | Firm | Amsterdam | 1 | 1 |