How a basement forecast became continental infrastructure
Six years building weather intelligence for the clean grid. Scroll to trace the path — the line draws itself as each milestone arrives.
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Founded
The first forecast
Two atmospheric scientists and one stubborn whiteboard in a Copenhagen basement. Our earliest model forecast a single wind farm — and beat the grid operator’s own numbers.
+11%more accurate than the incumbent -
Seed round
Signal, then scale
A seed round let us hire the first ten engineers and wire the platform straight into live satellite weather feeds, refreshed every fifteen minutes.
€4.2Mraised to build the pipeline -
Milestone
First gigawatt online
Operators across the Nordics plugged in. By December, Cumulus was balancing day-ahead forecasts for more than a gigawatt of renewable capacity.
1 GWof capacity under forecast -
Expansion
Coast to coast
Eleven new markets, three languages, and a 24/7 grid desk in Lisbon. The map finally stretched from the Atlantic shelf to the Baltic.
11new national markets -
Open platform
The open model
We published our forecasting core as an open standard so utilities could audit every number. Adoption was faster than anyone on the team predicted.
400+utilities onboarded in six months -
Today
A billion readings a day
Cumulus now ingests a billion sensor readings every single day, helping deliver cleaner, steadier electricity to nine million homes across the continent.
9Mhomes powered more cleanly