Bahnhof
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Bahnhof AB is a Swedish internet service provider and colocation operator best known for building data centers inside decommissioned Cold War and wartime bunkers, most famously the Pionen facility carved into a nuclear-proof shelter beneath Stockholm’s White Mountains. As of 2026 the company operates a small, distinctive footprint of roughly five active facilities concentrated in Stockholm, Malmö, and a new site under construction in Gothenburg, rather than a large multi-country network. Bahnhof differentiates itself through security-and-design-forward facilities (a former nightclub-themed data center, a pink “intergalactic” building in Kista, and now a second underground bunker in Gothenburg) rather than sheer scale, while also selling cloud/VPS and GPU-based “Accelerated Computing” services alongside traditional colocation.
Bahnhof operates as a cloud provider and colocation provider, with facilities at the following locations:
FACILITY OPERATOR
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Bahnhof Data Center Locations
- Malmö, Sweden Sparven PENDING REVIEW
Sparven, located in Malmö's Lugnet district, is described as Bahnhof's southernmost data center and is certified to Swedish protection class 3 under SSF 200. - Stockholm, Sweden Pionen CARRIER-NEUTRAL PENDING REVIEW
Pionen is a widely cited landmark data center built roughly 30 meters underground inside a former Cold War nuclear shelter beneath Stockholm's White Mountains, once reported to house a WikiLeaks server. - Stockholm, Sweden Thule PENDING REVIEW
Thule is a nightclub-themed data center in central Stockholm featuring disco lighting and an on-site bar, and its cooling system's waste heat is used to warm nearby housing and offices in the city. - Stockholm, Sweden St. Erik PENDING REVIEW
St. Erik occupies a building constructed in 1926 as Bilpalatset, once described as Europe's largest garage, later extensively renovated into a modern data center. - Stockholm, Sweden Gullan PENDING REVIEW
Gullan, opened in 2024 in the Kista telecom district, is described as the world's first pink, intergalactic-themed data center with a space-themed bar and conference room. - Gothenburg, Sweden Bahnhof Bunker (Bunkerberget)AI DATA CENTER PENDING REVIEW
Bahnhof Bunker is being built inside a roughly 6,000-square-meter former WWII air-raid shelter that was later used as a Cold War-era industrial bunker for manufacturer SKF and, more recently, a skatepark and event space.
By Continent
Bahnhof AI Data Centers
Bahnhof's clearest tie to AI-specific infrastructure is its Bahnhof Bunker facility, currently under construction in a 6,000-square-meter former WWII air-raid shelter in Gothenburg. Industry press reporting on the project has specifically noted it is being designed to accommodate the demands of AI computing power, alongside advanced network infrastructure, with completion targeted for 2026. Separately, Bahnhof sells a GPU-based "Accelerated Computing" cloud service across its Swedish data centers, though this is described at the company level rather than tied to one named building.
- Gothenburg, Sweden Bahnhof Bunker (Bunkerberget) AI DATA CENTER PENDING REVIEW
Bahnhof Bunker is being built inside a roughly 6,000-square-meter former WWII air-raid shelter that was later used as a Cold War-era industrial bunker for manufacturer SKF and, more recently, a skatepark and event space.
Common Questions
Does Bahnhof offer GPU or AI-specific infrastructure?
Bahnhof sells an "Accelerated Computing" GPU cloud product for AI and machine learning workloads, and its new Bahnhof Bunker facility under construction in Gothenburg has been explicitly described as designed to meet the growing computing demands of AI, though no specific GPU hardware model has been publicly detailed for that site.
Where are Bahnhof's physical data centers located?
Bahnhof's active or under-construction facilities are concentrated in Sweden: Pionen, Thule, and St. Erik in Stockholm, Gullan in Kista (part of the Stockholm area), Sparven in Malmö, and a new bunker facility, Bahnhof Bunker, under construction in Gothenburg.
What happened to Bahnhof's planned Elementica data center?
Bahnhof officially abandoned its long-delayed, 21MW Elementica project in Stockholm in 2025, citing the current European security situation, and redirected its investment toward the Bahnhof Bunker facility in Gothenburg instead.
Why does Bahnhof build data centers in bunkers?
Bahnhof's CEO has framed the bunker strategy around resilience and digital sovereignty, with Pionen built in a former nuclear shelter and the new Bahnhof Bunker sited in a decommissioned WWII air-raid shelter and Cold War-era SKF industrial bunker in Gothenburg.
Does Bahnhof offer colocation services?
Bahnhof is classified as a colocation provider among other services it offers — we can't confirm which specific facilities provide colocation services. Please contact Bahnhof directly to confirm colocation availability.
Does Bahnhof offer cloud services?
Bahnhof is classified as a cloud provider among other services it offers — we can't confirm which specific facilities provide cloud services. Please contact Bahnhof directly to confirm cloud availability.
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