Amazon Web Services vs Microsoft Azure: green hosting compared
Amazon Web Services and Microsoft Azure side by side: each one's Green Web Foundation listing, where its data centres are and how carbon-intensive those grids are, and the evidence it publishes. They are in alphabetical order: no host pays for its place.
The difference
We found no matching entry for either in the Green Web Foundation's directory.
Neither host's listed countries all have lower-carbon grids than the other's. Across both, their countries' grid averages run from 28 gCO2e/kWh in Norway (2025) to 902 gCO2e/kWh in Bahrain (2024), so which grid your site runs on depends on the region you choose.
On the listing and the grids, the evidence here does not separate them.
These are the facts we can show, not a verdict on which is greener: the listing, the grids and each company's own claims measure different things, and none of them measures your website. Each host's full page has every quote and source.
Each dot is a country where the host lists data centres, placed by that country's grid average. Amazon Web Services, no matching entry in the Green Web Foundation's directory: 27 countries, from 35 gCO2e/kWh in Sweden to 902 in Bahrain. Microsoft Azure, no matching entry in the Green Web Foundation's directory: 32 countries, from 28 gCO2e/kWh in Norway to 705 in Indonesia.
Show the data as a table
| Country | Grid average, gCO2e/kWh | Year | Amazon Web Services | Microsoft Azure |
|---|---|---|---|---|
| Norway | 28 | 2025 | No | Yes |
| Sweden | 35 | 2025 | Yes | Yes |
| Switzerland | 39 | 2025 | Yes | Yes |
| France | 41 | 2025 | Yes | Yes |
| New Zealand | 92 | 2025 | Yes | Yes |
| Denmark | 100 | 2025 | No | Yes |
| Brazil | 109 | 2025 | Yes | Yes |
| Austria | 117 | 2025 | No | Yes |
| Belgium | 151 | 2025 | No | Yes |
| Spain | 153 | 2025 | Yes | Yes |
| Canada | 192 | 2025 | Yes | Yes |
| United Kingdom | 218 | 2025 | Yes | Yes |
| Netherlands | 254 | 2025 | No | Yes |
| Ireland | 263 | 2025 | Yes | Yes |
| Italy | 284 | 2025 | Yes | Yes |
| Chile | 291 | 2025 | No | Yes |
| Germany | 334 | 2025 | Yes | Yes |
| United States | 384 | 2025 | Yes | Yes |
| South Korea | 418 | 2025 | Yes | Yes |
| United Arab Emirates | 470 | 2025 | Yes | Yes |
| Japan | 474 | 2025 | Yes | Yes |
| Mexico | 481 | 2025 | Yes | Yes |
| Israel | 493 | 2025 | Yes | Yes |
| Singapore | 497 | 2025 | Yes | Yes |
| Australia | 518 | 2025 | Yes | Yes |
| Thailand | 526 | 2025 | Yes | No |
| Qatar | 582 | 2025 | No | Yes |
| Poland | 591 | 2025 | No | Yes |
| Malaysia | 606 | 2025 | Yes | Yes |
| Taiwan (China) | 634 | 2025 | Yes | No |
| India | 671 | 2025 | Yes | Yes |
| Hong Kong (SAR of China) | 676 | 2024 | Yes | Yes |
| South Africa | 699 | 2025 | Yes | Yes |
| Indonesia | 705 | 2025 | Yes | Yes |
| Bahrain | 902 | 2024 | Yes | No |
Amazon Web Services
- Green Web Foundation
No matching entry in the Green Web Foundation's directory when we checked on 17 October 2026.
We looked for a provider with Amazon Web Services's website and found none. That says nothing either way about the energy behind its hosting; the evidence below is Amazon Web Services's own.
- Data centres
United States, South Africa, Hong Kong (SAR of China), India, Indonesia, Malaysia, Australia, New Zealand, Japan, South Korea, Singapore, Taiwan (China), Thailand, Canada, Germany, Ireland, United Kingdom, Italy, France, Spain, Sweden, Switzerland, Israel, Mexico, Bahrain, United Arab Emirates and Brazil
The countries of AWS's standard public regions. China and the US government regions need separate accounts and are not listed.
- Grid average where they are
- Across the listed countries, from 35 gCO2e/kWh in Sweden (2025) to 902 gCO2e/kWh in Bahrain (2024).
- Amazon Web Services's own evidence
- Carbon-free energy Undated
- Renewable Energy Methodology July 2026
- Evidence checked
- 16 October 2026
Microsoft Azure
- Green Web Foundation
No matching entry in the Green Web Foundation's directory when we checked on 17 October 2026.
We looked for a provider with Microsoft Azure's website and found none. That says nothing either way about the energy behind its hosting; the evidence below is Microsoft Azure's own.
- Data centres
Australia, Austria, Belgium, Brazil, Canada, India, United States, Chile, Denmark, Hong Kong (SAR of China), France, Germany, Indonesia, Israel, Italy, Japan, South Korea, Malaysia, Mexico, New Zealand, Ireland, Norway, Poland, Qatar, South Africa, Singapore, Spain, Sweden, Switzerland, United Arab Emirates, United Kingdom and Netherlands
The countries of Azure's public cloud regions; China and US government clouds are separate.
- Grid average where they are
- Across the listed countries, from 28 gCO2e/kWh in Norway (2025) to 705 gCO2e/kWh in Indonesia (2025).
- Microsoft Azure's own evidence
- 2026 Environmental Sustainability Report 9 July 2026
- Evidence checked
- 16 October 2026
Grid figures: Ember, Yearly electricity data (2026), CC BY 4.0. Listing data from the Green Web Foundation's Green Web Dataset, made available under the Open Database License (ODbL).