TheStorage 🇫🇮
Finnish sand-based thermal energy storage for industrial heat
About TheStorage
TheStorage offers a Thermal Energy Storage solution that utilizes its Sand-in-Motion technology to convert clean electricity into high-temperature heat stored in sand. This system enables the release of clean steam on demand, providing a reliable energy source for industrial processes while reducing costs and emissions.
TheStorage is a Finland-based company founded in 2023, now around 13 people. It has raised $4.2M in disclosed funding. FundFinder classes it as Climate & Energy.
Founded by Timo Siukkola (Co-Founder & CEO; previously ANDRITZ, Anteplan Oy; Tampere University of Applied Sciences), Esko Kulju (Co-Founder & Project Manager; previously Inwido Finland Oy, Pihla Ikkunat; Tampere University of Technology), Heikki Hannula (Co-Founder & Software Lead; repeat founder; previously CarDen Oy, Comille Oy; University of Oulu).
Its investors also appear on FundFinder's most-active lists for Seed · AI (93 funds), Seed · DeepTech (80 funds), Seed · Climate & Sustainability (80 funds).
Company facts from Harmonic and public filings; team backgrounds from public profiles. Refreshed weekly.
Seed · €3.6M · Apr 2026
- Voima Ventures — Helsinki deep tech VC with an office in Stockholm. · cheques £170k – £2.5M