Angel investor based in Berlin, Germany.
5 companies backed across
5 recorded rounds, Mar 2020 – Jan 2026.
Co-Founder FUEL, Superchat, Skinera, ex-Founder & CEO Gebraucht.de. WHU – Otto Beisheim School of Management BSc
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 Stefan Tietze appears as an investor in, most recent round first.
| Company | City | Sectors | Latest round | Rounds | Round value |
|---|---|---|---|---|---|
| SEAL Robotics | Garching | Manufacturing TechSmart FactoriesIndustry 4.0 | Seed Jan 2026 | 1 | $2.1M |
| Hyperdrives | Industrial Automation Equipment | Seed Sep 2025 | 1 | $3.5M | |
| heyData | Berlin | GRC Services | Seed Sep 2022 | 1 | $3.3M |
| Lumiform | Berlin | GRC Software | Series A Jul 2022 | 1 | $6.5M |
| Jus Mundi | Paris | Legal TechLegal Research SoftwareLegal SaaS | Seed Mar 2020 | 1 | $1.1M |
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 |
|---|---|---|---|---|
| Kai Hansen | Angel | Berlin | 2 | 2 |
| Rethink Ventures | Firm | Munich | 1 | 1 |
| January Ventures | Firm | Boston | 1 | 1 |
| Creator Fund | Firm | London | 1 | 1 |
| Charlie Songhurst | Angel | Kirkland | 1 | 1 |
| INSEAD | Firm | Paris | 1 | 1 |
| Prototype Capital | Firm | Pasadena | 1 | 1 |
| Acequia Capital | Firm | Seattle | 1 | 1 |
| Christian Henschel | Angel | Berlin | 1 | 1 |
| 10vc | Firm | Menlo Park | 1 | 1 |
| Dirk Freise | Angel | Hamburg | 1 | 1 |
| Thibaut Britz | Angel | 1 | 1 | |
| Patrice Deckert | Angel | Berlin | 1 | 1 |
| 2100 Ventures | Firm | Milano | 1 | 1 |
| Cedric Page | Angel | 1 | 1 | |
| EquityPitcher Ventures | Firm | Zurich | 1 | 1 |
| SDAC | Firm | 1 | 1 | |
| Marvelous | Firm | 1 | 1 | |
| Klaus Freiberg | Angel | 1 | 1 | |
| Holnest | Firm | Lyon | 1 | 1 |