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Sienna Venture Capital is a global investment firm funding promising tech entrepreneurs at early growth and growth stages. Utilizing proprietary dealflow, the firm provides strategic capital and advisory support to innovative ventures. Its investment focus spans Artificial Intelligence, Cybersecurity, Agrifoodtech, Digital Health, Mobility, and Industry 4.0, fostering advancements across these high-tech domains.
The firm’s foundation stems from the decade-long partnership of founders Isabelle Amiel and Thomas Visan. Prior to Sienna, Amiel and Visan collaboratively invested in tech, building successful venture funds and backing numerous companies. This extensive experience, coupled with a strategic GBL partnership, led to Sienna Venture Capital's formation, amplifying their impact on disruptive technologies.
Sienna Venture Capital engages visionary founders shaping technology's future, supporting them with capital, typically $5 to $10 million per opportunity. Beyond financial backing, the firm acts as trusted advisors to portfolio companies. Its vision is to empower these entrepreneurs, cultivating growth and innovation within the global technology landscape.
Key people at Sienna Capital.
Sienna Capital has 3 tracked investments across 3 companies. The latest tracked deal is $58.3M Debt in Karmen in January 2026.
| Date | Company | Round | Lead Investor(s) | Co-Investor(s) |
|---|---|---|---|---|
| Jan 13, 2026 | Karmen | $58.3M Debt | Sienna Capital, Fasanara Capital | — |
| Jan 1, 2021 | Globality | $140.0M Series E | Sienna Capital | Greylock, Spark Capital, Josh Elman, Narendra Rocherolle |
| Oct 24, 2019 | Pollen | $60.0M Other Equity | Gareth Jefferies | Backed, Nicola Mcclafferty, Kindred Ventures |
Key people at Sienna Capital.
