UniSieve AG is a Zurich-based deep tech company that develops high-precision membranes for industrial gas separation and carbon capture, using metal-organic frameworks (MOFs) and zeolites as molecular sieves. Founded in 2018 as an ETH Zurich spin-off by Samuel Hess and Elia Schneider, the company has brought its hybrid membranes to pre-commercial maturity in olefin production and point-source carbon capture, with customers such as Polish chemicals producer Qemetica. Its membranes replace energy-intensive thermal separation, a process class the company cites at 10-15% of global energy use.
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Oct 8, 2026
Latest raise
Funding activity · 1 round
Oct 8, 2026
$9M
Series A
Led by Orano Venture Fund
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