Websites Powered by Microsoft 365
2,953,772 websites tracked using Microsoft 365 (Webmail) · www.microsoft.com
Microsoft 365 is a webmail interface for reading email in a browser. Its official site is microsoft.com. PoweredBy tracks the websites that use Microsoft 365 across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the webmail ecosystem.
Usage trend
500K
1M
1.5M
2M
Aug 2022
Aug 2023
Jul 2024
Jul 2025
Jun 2026
Domains observed using Microsoft 365 in each month's HTTP Archive crawl,
Aug 2022 to Jun 2026 · peak 1,637,988 in Mar 2026. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.8 s
INP 50 ms
CLS 0
TTFB 700 ms
Median site among 1,403,795 Microsoft 365 sites with Chrome UX data, p75 values, Jun 2026.
Top countries
United States
513,561
United Kingdom
192,504
Germany
149,868
Canada
123,911
India
114,600
Netherlands
111,248
France
109,542
Australia
104,165
Sites using Microsoft 365 by audience country, Chrome UX Report.
Top sites by authority
9+
17% · 64 of 372 sites
8+
24% · 1,806 of 7,677 sites
7+
23% · 10,464 of 45,712 sites
6+
22% · 24,469 of 110,136 sites
5+
20% · 49,442 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Microsoft 365 in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Microsoft 365
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | europa.eu | 9.57/10 | 42,200 | 31,835 | Aug 2022 |
| 2 | microsoft.com | 9.54/10 | 11,686,100 | 988,151 | Aug 2022 |
| 3 | github.com | 9.52/10 | 9,549,800 | 3,397,501 | Apr 2026 |
| 4 | adobe.com | 9.48/10 | 8,627,700 | 1,068,559 | Aug 2022 |
| 5 | godaddy.com | 9.38/10 | 853,200 | 110,962 | Aug 2022 |
| 6 | who.int | 9.26/10 | 3,114,700 | 778,407 | Aug 2022 |
| 7 | harvard.edu | 9.24/10 | 472,900 | 13,570 | Aug 2022 |
| 8 | outlook.com | 9.23/10 | 48,300 | 2,569 | Aug 2022 |
| 9 | ca.gov | 9.23/10 | 1,457,100 | 28,722 | Aug 2022 |
| 10 | sciencedirect.com | 9.21/10 | 18,904,100 | 5,812,481 | Aug 2022 |
| 11 | un.org | 9.21/10 | 2,209,200 | 439,253 | Aug 2022 |
| 12 | live.com | 9.20/10 | 1 | 1 | Aug 2022 |
| 13 | mit.edu | 9.18/10 | 161,200 | 27,360 | Aug 2022 |
| 14 | bing.com | 9.17/10 | 407,000 | 87,316 | Aug 2022 |
| 15 | cnn.com | 9.16/10 | 15,960,900 | 3,032,217 | Aug 2022 |
| 16 | ftc.gov | 9.16/10 | 919,300 | 216,968 | Aug 2022 |
| 17 | nasa.gov | 9.15/10 | 2,715,500 | 372,280 | Aug 2022 |
| 18 | usda.gov | 9.14/10 | 476,600 | 147,178 | Aug 2022 |
| 19 | epa.gov | 9.13/10 | 3,848,900 | 707,207 | Aug 2022 |
| 20 | xing.com | 9.12/10 | 1,000 | 7,689 | Jun 2023 |
| 21 | ico.org.uk | 9.12/10 | 31,500 | 17,128 | Aug 2022 |
| 22 | nist.gov | 9.12/10 | 677,600 | 130,365 | Aug 2022 |
| 23 | afternic.com | 9.11/10 | 4,200 | 1,398 | Aug 2022 |
| 24 | pewresearch.org | 9.11/10 | 1,413,600 | 423,862 | Aug 2022 |
| 25 | rakuten.co.jp | 9.11/10 | 9,200 | 1,689 | Aug 2022 |
| 26 | sharepoint.com | 9.10/10 | - | - | Aug 2022 |
| 27 | cornell.edu | 9.10/10 | 242,100 | 23,854 | Aug 2022 |
| 28 | hhs.gov | 9.10/10 | 1,465,200 | 282,522 | Aug 2022 |
| 29 | usatoday.com | 9.08/10 | 10,803,700 | 3,413,388 | Mar 2025 |
| 30 | canada.ca | 9.08/10 | 2,129,800 | 995,010 | Aug 2022 |
| 31 | mhlw.go.jp | 9.08/10 | 15,300 | 12,761 | Aug 2022 |
| 32 | bls.gov | 9.08/10 | 4,335,300 | 639,170 | Aug 2025 |
| 33 | sagepub.com | 9.07/10 | 31,500 | 2,940 | Aug 2022 |
| 34 | state.gov | 9.07/10 | 3,314,200 | 200,218 | Aug 2022 |
| 35 | unesco.org | 9.06/10 | 294,400 | 71,304 | Aug 2022 |
| 36 | frontiersin.org | 9.06/10 | 869,400 | 706,983 | Feb 2024 |
| 37 | dailymail.co.uk | 9.05/10 | 3,262,200 | 2,003,262 | Aug 2022 |
| 38 | ed.gov | 9.05/10 | 1,229,500 | 99,935 | Aug 2022 |
| 39 | bizjournals.com | 9.04/10 | 814,500 | 869,896 | Aug 2022 |
| 40 | matomo.org | 9.04/10 | 10,500 | 5,264 | Jun 2026 |
| 41 | iso.org | 9.04/10 | 663,700 | 64,103 | Aug 2022 |
| 42 | msn.com | 9.04/10 | 7,859,900 | 2,516,504 | Aug 2022 |
| 43 | businesswire.com | 9.04/10 | 728,000 | 421,020 | Aug 2022 |
| 44 | sec.gov | 9.04/10 | 1,451,500 | 433,666 | Jan 2025 |
| 45 | ny.gov | 9.04/10 | 691,300 | 55,212 | Aug 2022 |
| 46 | cpanel.net | 9.03/10 | 20,300 | 4,682 | Aug 2022 |
| 47 | userway.org | 9.03/10 | 8,200 | 2,564 | Sep 2024 |
| 48 | oup.com | 9.03/10 | 570 | 405 | Mar 2025 |
| 49 | oecd.org | 9.03/10 | 369,300 | 169,314 | Aug 2022 |
| 50 | apnews.com | 9.02/10 | 4,786,200 | 1,390,077 | Aug 2022 |
| 51 | columbia.edu | 9.02/10 | 770,900 | 41,349 | Aug 2022 |
| 52 | nps.gov | 9.02/10 | 23,101,200 | 1,958,815 | Aug 2022 |
| 53 | unicef.org | 9.01/10 | 286,700 | 135,578 | Aug 2022 |
| 54 | bbb.org | 9.01/10 | 8,953,200 | 3,866,716 | Jul 2023 |
| 55 | psu.edu | 9.01/10 | 581,600 | 94,595 | Aug 2022 |
| 56 | umich.edu | 9.01/10 | 36,500 | 1,974 | Aug 2022 |
| 57 | yale.edu | 9.01/10 | 177,900 | 6,885 | Aug 2022 |
| 58 | pbs.org | 9.01/10 | 10,732,500 | 2,329,939 | Apr 2024 |
| 59 | uk.com | 9.00/10 | 2 | 12 | Aug 2022 |
| 60 | fastcompany.com | 9.00/10 | 580,900 | 399,386 | Jun 2025 |
| 61 | psychologytoday.com | 9.00/10 | 3,370,000 | 1,004,559 | Aug 2022 |
| 62 | plos.org | 9.00/10 | 9,300 | 4,623 | Aug 2022 |
| 63 | upenn.edu | 9.00/10 | 179,200 | 5,457 | Aug 2022 |
| 64 | dol.gov | 9.00/10 | 2,744,400 | 631,787 | Oct 2023 |
| 65 | service.gov.uk | 8.99/10 | - | - | Aug 2022 |
| 66 | ohchr.org | 8.98/10 | 379,200 | 109,533 | Aug 2022 |
| 67 | marriott.com | 8.98/10 | 13,740,800 | 1,485,399 | May 2024 |
| 68 | healthline.com | 8.98/10 | 32,274,400 | 5,254,611 | Aug 2022 |
| 69 | princeton.edu | 8.98/10 | 246,800 | 50,700 | Aug 2022 |
| 70 | jstor.org | 8.98/10 | 765,500 | 767,907 | Apr 2026 |
| 71 | texas.gov | 8.98/10 | 856,400 | 43,777 | Aug 2022 |
| 72 | globenewswire.com | 8.96/10 | 279,600 | 270,662 | Aug 2022 |
| 73 | spiegel.de | 8.96/10 | 26,500 | 34,282 | Aug 2022 |
| 74 | nsw.gov.au | 8.95/10 | 75,300 | 73,181 | Aug 2022 |
| 75 | mynavi.jp | 8.95/10 | 81 | 14 | Mar 2026 |
| 76 | sba.gov | 8.95/10 | 1,497,200 | 300,158 | Apr 2023 |
| 77 | usgs.gov | 8.95/10 | 3,119,800 | 407,471 | Aug 2022 |
| 78 | ethz.ch | 8.95/10 | 12,900 | 11,869 | Mar 2023 |
| 79 | fcc.gov | 8.94/10 | 859,700 | 181,746 | Sep 2025 |
| 80 | elsevier.com | 8.93/10 | 344,600 | 88,582 | Aug 2022 |
| 81 | maine.gov | 8.93/10 | 1,116,200 | 428,738 | Aug 2022 |
| 82 | ucla.edu | 8.93/10 | 412,200 | 14,756 | Aug 2022 |
| 83 | wa.gov | 8.93/10 | 719,800 | 8,195 | Aug 2022 |
| 84 | ipcc.ch | 8.93/10 | 80,900 | 48,331 | Aug 2022 |
| 85 | utexas.edu | 8.92/10 | 503,000 | 11,984 | Sep 2024 |
| 86 | si.edu | 8.92/10 | 1,458,100 | 152,619 | Aug 2022 |
| 87 | aepd.es | 8.91/10 | 810 | 2,021 | Aug 2022 |
| 88 | newsweek.com | 8.90/10 | 5,153,000 | 1,681,137 | Jan 2023 |
| 89 | nationalgeographic.com | 8.90/10 | 3,598,800 | 677,296 | Aug 2022 |
| 90 | nyc.gov | 8.90/10 | 3,942,300 | 913,688 | Aug 2022 |
| 91 | dot.gov | 8.90/10 | - | - | Aug 2022 |
| 92 | nvidia.com | 8.89/10 | 1,845,000 | 409,683 | Aug 2022 |
| 93 | imf.org | 8.89/10 | 704,000 | 210,345 | Aug 2022 |
| 94 | hbs.edu | 8.89/10 | 272,000 | 59,628 | Aug 2022 |
| 95 | boe.es | 8.89/10 | 21,700 | 67,637 | Mar 2023 |
| 96 | usc.edu | 8.89/10 | 361,000 | 14,987 | Aug 2022 |
| 97 | brookings.edu | 8.89/10 | 748,100 | 245,992 | Aug 2022 |
| 98 | termly.io | 8.88/10 | 155,200 | 8,893 | Jul 2024 |
| 99 | hilton.com | 8.88/10 | 11,989,800 | 1,201,334 | Aug 2022 |
| 100 | ssrn.com | 8.88/10 | 19,900 | 24,188 | Aug 2022 |
Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.
Download top 10,000 as CSV (zip) →
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