Websites Powered by UNIX
276,329 websites tracked using UNIX (Operating systems) · unix.org
UNIX is a server operating system the site runs on. Its official site is unix.org. PoweredBy tracks the websites that use UNIX across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the operating systems ecosystem.
Usage trend
50K
100K
150K
Apr 2018
Jun 2020
Jul 2022
Sep 2024
Oct 2026
Domains observed using UNIX in each month's HTTP Archive crawl,
Apr 2018 to Oct 2026 · peak 105,893 in Aug 2022. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.8 s
INP 75 ms
CLS 0
TTFB 900 ms
Median site among 78,743 UNIX sites with Chrome UX data, p75 values, Sep 2026.
Top countries
Germany
41,960
United States
10,264
Japan
5,128
Netherlands
4,918
South Korea
4,910
India
4,782
Spain
4,256
United Kingdom
3,718
Sites using UNIX by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Real estate | 3.64% | 2,581 |
| Arts and entertainment | 1.16% | 480 |
| Government | 0.50% | 40 |
| Sports and fitness | 0.47% | 78 |
| Non-profit and religious | 0.46% | 36 |
| Beauty and wellness | 0.41% | 106 |
| Education | 0.40% | 198 |
| Healthcare | 0.38% | 409 |
| Travel and hospitality | 0.30% | 220 |
| Restaurants and food | 0.26% | 361 |
| Blogs and publishing | 0.25% | 62 |
| Home and construction | 0.24% | 115 |
Share of each industry's websites with a detected stack that use UNIX; industries come from what sites declare in their own structured data.
Top sites by authority
9+
5% · 17 of 372 sites
8+
3% · 228 of 7,677 sites
7+
1% · 590 of 45,712 sites
6+
<1% · 919 of 110,136 sites
5+
<1% · 1,342 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running UNIX in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using UNIX
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | europa.eu | 9.57/10 | 42,200 | 31,835 | Apr 2021 |
| 2 | amazonaws.com | 9.50/10 | - | - | Jan 2019 |
| 3 | nih.gov | 9.44/10 | 298,300 | 34,546 | Aug 2018 |
| 4 | stanford.edu | 9.19/10 | 3,302,700 | 5,160 | Aug 2018 |
| 5 | bbc.co.uk | 9.18/10 | 6,004,800 | 2,144,161 | Jun 2024 |
| 6 | mit.edu | 9.18/10 | 163,800 | 31,239 | Jan 2016 |
| 7 | nasa.gov | 9.15/10 | 2,697,400 | 289,920 | Aug 2018 |
| 8 | wiley.com | 9.14/10 | 76,400 | 29,151 | Aug 2018 |
| 9 | usda.gov | 9.14/10 | 474,600 | 136,928 | Aug 2018 |
| 10 | epa.gov | 9.13/10 | 3,829,800 | 580,699 | Jan 2019 |
| 11 | berkeley.edu | 9.10/10 | 166,700 | 4,721 | Aug 2018 |
| 12 | hhs.gov | 9.10/10 | 1,457,200 | 246,424 | Aug 2018 |
| 13 | canada.ca | 9.08/10 | 2,129,800 | 995,010 | Apr 2019 |
| 14 | noaa.gov | 9.07/10 | 1,233,000 | 125,205 | Aug 2022 |
| 15 | free.fr | 9.05/10 | 3,400 | 1,262 | Aug 2018 |
| 16 | uk.com | 9.00/10 | 2 | 12 | Jan 2016 |
| 17 | upenn.edu | 9.00/10 | 178,900 | 4,794 | Aug 2018 |
| 18 | marriott.com | 8.98/10 | 12,972,400 | 790,752 | Oct 2024 |
| 19 | princeton.edu | 8.98/10 | 244,600 | 46,551 | Aug 2018 |
| 20 | wisc.edu | 8.97/10 | 461,200 | 6,382 | Aug 2018 |
| 21 | washington.edu | 8.96/10 | 663,900 | 86,604 | Jan 2016 |
| 22 | sakura.ne.jp | 8.95/10 | - | - | Jan 2016 |
| 23 | fao.org | 8.93/10 | 213,900 | 125,762 | May 2019 |
| 24 | wa.gov | 8.93/10 | 719,700 | 7,869 | Aug 2018 |
| 25 | cisco.com | 8.92/10 | 1,161,900 | 251,239 | Aug 2018 |
| 26 | utexas.edu | 8.92/10 | 502,800 | 11,092 | Aug 2018 |
| 27 | uchicago.edu | 8.92/10 | 63,700 | 10,331 | Aug 2018 |
| 28 | mlit.go.jp | 8.92/10 | 11,100 | 6,476 | Jul 2019 |
| 29 | gov.ru | 8.91/10 | 2,700 | 216 | Jun 2016 |
| 30 | debian.org | 8.88/10 | 39,200 | 13,062 | Oct 2021 |
| 31 | duke.edu | 8.88/10 | 194,300 | 1,396 | Jan 2019 |
| 32 | azurewebsites.net | 8.87/10 | - | - | Apr 2019 |
| 33 | northwestern.edu | 8.86/10 | 193,400 | 45,922 | May 2020 |
| 34 | cancer.gov | 8.86/10 | 4,680,800 | 325,886 | Aug 2018 |
| 35 | umd.edu | 8.85/10 | 253,200 | 15,103 | Aug 2018 |
| 36 | ufl.edu | 8.84/10 | 241,500 | 3,277 | Sep 2018 |
| 37 | illinois.edu | 8.83/10 | 47,000 | 3,612 | Aug 2018 |
| 38 | unc.edu | 8.83/10 | 341,300 | 24,562 | Jul 2022 |
| 39 | mpg.de | 8.81/10 | 59,700 | 20,903 | Jan 2019 |
| 40 | utoronto.ca | 8.81/10 | 42,800 | 10,094 | Aug 2018 |
| 41 | utah.gov | 8.80/10 | 129,700 | 22,115 | Aug 2018 |
| 42 | msu.edu | 8.78/10 | 149,500 | 2,186 | Aug 2018 |
| 43 | uci.edu | 8.76/10 | 94,600 | 9,503 | Aug 2018 |
| 44 | nielsen.com | 8.75/10 | 89,300 | 35,566 | Aug 2018 |
| 45 | army.mil | 8.75/10 | 1,036,400 | 233,760 | May 2026 |
| 46 | rutgers.edu | 8.75/10 | 146,600 | 28,567 | Aug 2018 |
| 47 | epfl.ch | 8.74/10 | 12,900 | 6,546 | Aug 2018 |
| 48 | brown.edu | 8.73/10 | 376,500 | 23,950 | Aug 2018 |
| 49 | virginia.edu | 8.73/10 | 265,100 | 10,889 | Aug 2018 |
| 50 | r-project.org | 8.72/10 | 37,500 | 4,317 | Aug 2018 |
| 51 | ncsu.edu | 8.72/10 | 155,600 | 15,166 | Aug 2018 |
| 52 | rochester.edu | 8.71/10 | 241,200 | 60,872 | Aug 2018 |
| 53 | docomo.ne.jp | 8.71/10 | 4,100 | 2,896 | Feb 2022 |
| 54 | u-tokyo.ac.jp | 8.71/10 | 25,200 | 7,795 | Aug 2018 |
| 55 | hku.hk | 8.70/10 | 6,000 | 1,100 | Aug 2018 |
| 56 | sfgate.com | 8.70/10 | 1,315,100 | 532,900 | Jul 2025 |
| 57 | gov.bc.ca | 8.69/10 | 2,200 | 880 | Aug 2018 |
| 58 | pitt.edu | 8.69/10 | 62,900 | 8,520 | Jan 2023 |
| 59 | eplus.jp | 8.69/10 | 3,000 | 676 | Aug 2022 |
| 60 | unibo.it | 8.68/10 | 11,100 | 4,872 | Apr 2020 |
| 61 | ky.gov | 8.68/10 | - | 1 | Apr 2023 |
| 62 | adp.com | 8.67/10 | 3,543,100 | 201,584 | Dec 2021 |
| 63 | esa.int | 8.67/10 | 412,100 | 94,679 | Jan 2019 |
| 64 | azure.com | 8.66/10 | - | - | Apr 2020 |
| 65 | uw.edu | 8.66/10 | - | 3 | May 2017 |
| 66 | caltech.edu | 8.65/10 | 148,200 | 20,173 | Aug 2018 |
| 67 | uga.edu | 8.65/10 | 234,500 | 2,950 | Aug 2018 |
| 68 | usp.br | 8.65/10 | 1 | 19 | Jan 2019 |
| 69 | orange.fr | 8.64/10 | 2,600 | 209 | May 2022 |
| 70 | autodesk.com | 8.63/10 | 742,400 | 114,708 | Dec 2020 |
| 71 | rlp.de | 8.63/10 | 210 | 110 | Feb 2024 |
| 72 | gencat.cat | 8.63/10 | 86 | 174 | Aug 2018 |
| 73 | com.de | 8.62/10 | 5 | 14 | Feb 2017 |
| 74 | hawaii.edu | 8.62/10 | 117,100 | 43,233 | Aug 2018 |
| 75 | caa.go.jp | 8.62/10 | 94 | 118 | Jan 2022 |
| 76 | hrc.org | 8.61/10 | 260,500 | 49,890 | Dec 2023 |
| 77 | tum.de | 8.61/10 | 7,800 | 7,642 | Jul 2019 |
| 78 | kit.edu | 8.60/10 | 3,500 | 1,669 | Jul 2024 |
| 79 | ucm.es | 8.60/10 | 15,000 | 16,497 | Aug 2018 |
| 80 | iastate.edu | 8.60/10 | 161,300 | 18,508 | Aug 2018 |
| 81 | nii.ac.jp | 8.60/10 | 1,800 | 295 | Aug 2018 |
| 82 | unibe.ch | 8.60/10 | 4,700 | 1,336 | Aug 2018 |
| 83 | sc.gov | 8.59/10 | 126,100 | 20,150 | Aug 2018 |
| 84 | ahrq.gov | 8.59/10 | 136,400 | 42,617 | Oct 2024 |
| 85 | krakow.pl | 8.59/10 | 690 | 649 | May 2019 |
| 86 | csic.es | 8.59/10 | 1,200 | 2,107 | Aug 2018 |
| 87 | uni-heidelberg.de | 8.58/10 | 8,000 | 4,696 | Aug 2018 |
| 88 | unam.mx | 8.58/10 | 1,900 | 1,196 | Aug 2018 |
| 89 | cnr.it | 8.57/10 | 810 | 1,174 | Aug 2018 |
| 90 | usf.edu | 8.57/10 | 459,500 | 80,745 | Aug 2018 |
| 91 | kyoto-u.ac.jp | 8.57/10 | 4,800 | 3,548 | Aug 2018 |
| 92 | sfchronicle.com | 8.56/10 | 778,100 | 422,046 | Sep 2024 |
| 93 | nc.gov | 8.56/10 | 487,300 | 41,555 | Dec 2020 |
| 94 | gmu.edu | 8.56/10 | 143,200 | 25,328 | Aug 2018 |
| 95 | utwente.nl | 8.56/10 | 11,800 | 6,416 | Jul 2019 |
| 96 | goethe.de | 8.56/10 | 39,200 | 35,320 | Dec 2025 |
| 97 | cuni.cz | 8.56/10 | 4,400 | 1,637 | Aug 2018 |
| 98 | gu.se | 8.56/10 | 18,300 | 8,934 | Sep 2018 |
| 99 | belgium.be | 8.55/10 | 20,400 | 1,736 | Oct 2022 |
| 100 | rwth-aachen.de | 8.55/10 | 640 | 1,476 | Aug 2018 |
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) →
Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).