OnZero: Sipoo Söderkulla

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Operational
Fully operational facility
Operated by:

OnZero: Sipoo Söderkulla

Year Built: 2025
Utility Provider: Sipoon Energia Sähköverkko
░░░ Request Dataset MW
Operational Power

Site History

  • In November 2025, the data center entered service.

Project Profile

  • Operator: OnZero Finland
  • Design: two container-size modules, liquid-cooled
  • Heat: about 20 GWh a year, roughly three quarters of Söderkulla's district heating demand

Map and Nearby Locations

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OnZero Sites
Nearby Facilities

OnZero: Sipoo Söderkulla Power Growth Over Time

+0% since 2022
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Planned
Prospective
Land Bank
In Doubt
Currently Operational
across NN Request Dataset sites
Under Construction
NN Request Dataset sites currently building
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NN Request Dataset sites announced, but haven't started construction

Sites within 15 miles of OnZero: Sipoo Söderkulla

Distance Site About
7.02 miles Verne: FL-HEL-DC03
This facility is part of Verne Global’s 'The Air' Campus, located in the Helsinki metropolitan area (Vantaa).
7.03 miles Verne: FL-HEL-DC01
Verne, the leading provider of sustainably powered HPC data centers across the Nordics, has acquired the land at its existing Helsinki data center campus, securing room for future expansion.
7.07 miles Verne: FL-HEL-DC02
This facility is part of Verne Global’s 'The Air' Campus, located in the Helsinki metropolitan area (Vantaa).
7.09 miles Verne: FL-HEL-DC04
This facility is part of Verne Global’s 'The Air' Campus, located in the Helsinki metropolitan area (Vantaa).
7.78 miles FCDC: Kerava
FCDC plans a data center campus of five buildings in the Alikerava area of southern Kerava, between the Lahti motorway and the Keravanjoki river.
7.98 miles Brunswick: Heikinlaakso, Helsinki
This proposed data center development north of Helsinki is at the land-reservation and pre-zoning stage, filed by Brunswick Real Estate Finland Oy. The operator has not yet been disclosed and is expected to be named later in the planning process.
9.95 miles Hetzner Finland
The entire site is 150,000 m², making it spacious enough to accommodate 20 data centers.
12.28 miles Equinix Helsinki HE5
13.98 miles Equinix Helsinki HE3
14.29 miles atNorth: FIN01
FIN01 is located in the Vallila area of Helsinki with a gross space of 1,200 sqm.
14.55 miles Elisa Helsinki Pasila
14.70 miles Digita: Helsinki Data Center 2 (Pieni Paja)
Digita Helsinki Data Center 2, known as Pieni Paja, is a colocation data center on the Pasila campus at Televisiokatu 2 in Helsinki. It opened in 2023 next to Digita's original Pasila data center.
14.76 miles Digita Pasila Broadcasting Tower
14.96 miles Equinix Helsinki HE2
The site was a Telecity managed datacenter before Equinix acquired Telecity in July 2016.
15.66 miles Telia Pitäjänmäki (Nebula Oy)
The facility was acquired by Telia when it acquired Nebula Oy in 2017. The Nebula server room in the building has since closed.
15.73 miles Atomidata: Helsinki
Atomidata operates a small colocation data center at Valimotie 13A in Pitäjänmäki, Helsinki.
15.73 miles Telia Helsinki Kansakoulukuja
15.75 miles Carrier Data CenterInterested in this information?Contact us Data center facility details are available on request.Interested in this information?Contact us
15.81 miles Verda: Helsinki (Telia HDC)
Verda runs GPU cloud capacity inside Telia Helsinki Data Center in Pitäjänmäki, Helsinki, which Telia resells as Telia Sovereign AI Cloud.
15.81 miles Creanova: Helsinki
Creanova operates a carrier-neutral colocation data center at Hiomotie 10 in Pitäjänmäki, Helsinki. The facility opened in 1996.
15.81 miles Telia Helsinki Pitäjänmäki
The site is powered by 100 percent renewable energy and will recycle waste heat from the servers, producing 200,000 MWh per year - enough heat to supply 20,000 homes in the nearby town of Espoo.
15.82 miles Gcore: Helsinki (Telia HDC)
Gcore runs an AI GPU cloud cluster inside Telia Helsinki Data Center in Pitäjänmäki, Helsinki.
15.83 miles UpCloud: Helsinki FI-HEL2
UpCloud's FI-HEL2 cloud zone runs inside Telia Helsinki Data Center in Pitäjänmäki, Helsinki, and includes the company's GPU servers.
15.95 miles Equinix Helsinki HE1
15.95 miles Mediam Helsiki Data Center
16.06 miles Hyperco: Vantaa
Hyperco owns the data center building at Myllynkivenkuja 4 in Vantaa, which houses Equinix HE4 and Thales. Hyperco has been part of DAMAC's data center business since 2025.
16.09 miles Equinix Helsinki HE4
16.29 miles Prime: Järvenpää, Finland
US-based operator Prime Data Centers has announced plans for a significant expansion into Finland, targeting a 12-hectare site in the Vähänummi industrial area of Järvenpää.
17.70 miles LocalNet: Lauttasaari
LocalNet Lauttasaari is a colocation data center in the former Nebula server room at Kiviaidankatu 2 in Lauttasaari, Helsinki. Local Loop Oy, which trades as LocalNet, took over the facility from Telia in July 2026.
17.72 miles Elisa Helsinki Lauttasaari
18.01 miles Elisa Espoo Säterinportti
18.69 miles Technopolis Innopoli
18.72 miles GlobalConnect: Espoo Innopoli
19.31 miles Equinix Helsinki HE6
19.37 miles Elisa Espoo Tapiola
19.38 miles Equinix Helsinki HE7 Sinimäki
19.42 miles Equinix: Helsinki HE8
Equinix plans a new data center, HE8, attached to its HE7 building at Sinimäentie 8 in Espoo's Laajalahti district. The Suosaari detailed plan change would allow the extension in place of a vacant office wing.
19.54 miles atNorth: FIN02
Located in Sinimäentie, Espoo, within the Helsinki metropolitan area, the new campus spans 23,000 square meters at full buildout. The initial phase of FIN02 offers 2,196 square meters of white space.
19.63 miles Enterprise Data CenterInterested in this information?Contact us Data center facility details are available on request.Interested in this information?Contact us
19.98 miles atNorth: FIN03
FIN03 is located in Espoo with a gross space of 1,200 sqm.

Operating Company

Operated by:

OnZero is headquartered in Vienna, Austria, and develops what it calls AI Heat Factories: liquid-cooled data centers that recover up to 99% of compute heat into district heating networks. Its Finnish subsidiary, OnZero Finland Oy, was formerly Blockbase Finland Oy, and the founders previously ran the mining-as-a-service firm Blockbase. OnZero operates in Finland at Söderkulla in Sipoo and in Kemijärvi.

OnZero History:

  • In August 2026, OnZero agreed with Helen to supply recovered AI compute heat to Helsinki's district heating network.
  • In November 2025, OnZero's container data center at Söderkulla, Sipoo, entered service.
  • In August 2024, Blockbase Finland Oy was renamed OnZero Finland Oy.
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