1. 04 May 2026

   Seed

   €3.6M

   Cumulative €3.6M

Amounts in EUR, converted at the ECB rate on the event date. Funding totals exclude debt, grants and state aid; rounds whose instrument is not yet established are still counted. Every figure links to its source.

• Funding04 May 2026EUR 3.6M

  Finland’s TheStorage raises €3.6 million seed to commercialise sand-based energy storage.

  ▸Source: ArcticStartup

  “Tampere-based cleantech startup TheStorage has raised €3.6 million in seed funding to accelerate the commercial rollout of its industrial-scale thermal energy storage technology, with the round led…”

  Read at ArcticStartup

• Timo Siukkola

  CEO and co-founder

What does TheStorage do?

Finnish climate-tech company developing scalable, sand-based thermal energy storage (Sand-in-Motion) to decarbonise industrial heat.

When was TheStorage founded?

TheStorage was founded in 2023.

Where is TheStorage headquartered?

TheStorage is headquartered in Tampere, Finland.

How much funding has TheStorage raised?

TheStorage has raised €3.6M (across 1 round · last 04 May 2026).

What was TheStorage's latest funding round?

TheStorage's most recent disclosed round was a seed round of €3.6M, announced 4 May 2026.

Who has invested in TheStorage?

Investors in TheStorage include Voima Ventures.