Susten is a venture capital firm. Team members are concentrated in Andermatt, Uri, Switzerland. Among the 6 companies in the known portfolio are Perceptual Robotics, Sunswap, QLM Technology, Thermulon, 8power and GRZ Technologies.
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Investment focus
Who to pitch at Susten
Susten portfolio companies (6)
- Perceptual Robotics
- Sunswap
- QLM Technology
- Thermulon
- 8power
- GRZ Technologies
Co-investors
Funds that share portfolio companies with Susten.
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About Susten
The firm's listing covers sectors AI, Climate and Hardware, and focus areas Analytics, Battery, Clean Energy and Clean Tech; known deals cluster at Late-Stage, Seed and Series A.
Of the 4 people on file at Susten, Chrysanthi Vakla (Chief Executive Officer), John Marrow (Venture Partner) and David Herne (Investor) are listed as the contacts to approach first.
Across the known portfolio, 11 co-investors appear alongside Susten, including Barclays Corporate Banking, Clean Growth Fund and Deeptech Labs.
Frequently asked questions
What is Susten?
Susten is a venture capital firm whose team is concentrated in Andermatt, Uri, Switzerland, with a known portfolio of 6 companies. The portfolio comes from public investment records rather than from the firm, so deals that never surfaced publicly are not in it.
What does Susten invest in?
Listed sectors include AI, Climate and Hardware; listed focus areas include Analytics, Battery, Clean Energy and Clean Tech. Those tags come from the portfolio attached to the firm, so they describe what has been backed rather than a stated mandate for what comes next.
What stage does Susten invest at?
The known deals of Susten include Late-Stage, Seed and Series A rounds. Check that against your own round before reaching out: stage mismatch is the most common reason a well matched sector still goes nowhere.
Who should I pitch at Susten?
3 of the 4 people on file at Susten are listed as contacts for the firm. All 4 have their own profile page.
How do I contact Susten?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 4 people attached to the firm have their own pages, each showing whether an address is on file for them.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal