UniSieve 🇨🇭
Gas-separation membranes for plastics manufacturing and carbon capture
About UniSieve
UniSieve provides industrial gas-separation systems using molecular-sieving membranes to selectively separate gases and recover molecules from process and off-gas streams. The systems combine membrane technology with process engineering for on-site integration, offering an alternative to more energy-intensive or chemical-based separation methods.
UniSieve is a Switzerland-based company founded in 2018, now around 26 people. It has raised $9M in disclosed funding. FundFinder classes it as Climate & Energy.
Its investors also appear on FundFinder's most-active lists for Series A · Generalist (64 funds), Series A · DeepTech (53 funds), Series A · Hardware (12 funds).
Company facts from Harmonic and public filings; team backgrounds from public profiles. Refreshed weekly.
Series A · $9M · Oct 2026
Founderful- Founderful — Switzerland's leading pre-seed fund (formerly Wingman Ventures), closing an oversubscribed $140m Fund II in 2024; writes ~$1m pre-seed and up to ~$2m seed cheques into Swiss startups, with LPs behind Duolingo, On and Cli · cheques £800k – £1.7M