Frontier AI datacentre
Nebius Mantsala
75 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source145 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026SourceNebius Mantsala against the largest sites worldwide
| Site | Owner | Users | Country | Online now | Planned | Planned date |
|---|---|---|---|---|---|---|
| Microsoft Fairwater Wisconsin | Microsoft | OpenAI, Microsoft | United States | 369 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 2.26 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 13 May 2028 |
| Anthropic-Amazon New Carlisle | Amazon | Anthropic | United States | 910 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.93 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 17 Mar 2028 |
| OpenAI Stargate New Mexico | Oracle | OpenAI | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.75 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 31 Dec 2028 |
| Meta Hyperion | Meta | Meta | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.63 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1 Jan 2028 |
| Colossus 2 | SpaceXAI | Anthropic, Cursor, SpaceXAI | United States | 946 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.53 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 25 Feb 2027 |
| OpenAI Stargate Shackelford | Oracle | OpenAI | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.40 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 11 Nov 2028 |
| QTS Cedar Rapids | Not stated | Not stated | United States | 0 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 1.13 GWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 15 Nov 2027 |
| Nebius Mantsala | Nebius | Microsoft | Finland | 75 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 145 MWEpoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source | 31 Dec 2027 |
Site details
- Owner
- Nebius
- Users
- Microsoft
- Country
- Finland
- IT power online now
- estimate at 29 Jun 2026
75 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source - Largest planned IT power
145 MW
Epoch AI Frontier Data Centers (CC BY 4.0)As of 14 Oct 2026Source- Planned date
- 31 Dec 2027
Latest construction note
All three buildings in the first phase are operational.
Note from Epoch AI, Frontier Data Centers (epoch.ai/data/data-centers) (CC BY 4.0).
Questions
Who owns Nebius Mantsala?
Epoch AI's register lists Nebius as the owner of Nebius Mantsala, in Finland.
Who uses Nebius Mantsala?
The register lists Microsoft as the users of the site.
How much power does Nebius Mantsala have?
75 MW of IT power was online at the latest estimate in the register, against 145 MW planned, 52% of the plan (calculated). Snapshot of 14 Oct 2026.
When will Nebius Mantsala be finished?
Epoch AI's timeline puts the site's largest planned IT power, 145 MW, at Dec 2027. Timelines are estimates and change as construction progresses.
Where does this datacentre data come from?
Epoch AI's Frontier Data Centers register (CC BY 4.0), which estimates each site's IT power over time from satellite imagery, permits and company statements. Figures are estimates, not company specifications.
Updated 14 Oct 2026. Source: Epoch AI, Frontier Data Centers (epoch.ai/data/data-centers) (CC BY 4.0). Estimates, not company specifications. Methodology: Pipeline Tracker. Not investment advice.
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