Websites Powered by UNIX
274,465 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
May 2020
May 2022
Jun 2024
Jun 2026
Domains observed using UNIX in each month's HTTP Archive crawl,
Apr 2018 to Jun 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 80,940 UNIX sites with Chrome UX data, p75 values, Jun 2026.
Top countries
Germany
47,181
United States
12,287
Japan
6,172
South Korea
5,800
Netherlands
5,750
India
5,482
Spain
4,695
United Kingdom
4,270
Sites using UNIX by audience country, Chrome UX Report.
Top sites by authority
9+
5% · 17 of 372 sites
8+
3% · 237 of 7,677 sites
7+
1% · 613 of 45,712 sites
6+
<1% · 991 of 110,136 sites
5+
<1% · 1,453 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 | 301,200 | 37,339 | Aug 2018 |
| 4 | ca.gov | 9.23/10 | 1,457,100 | 28,722 | Aug 2018 |
| 5 | stanford.edu | 9.19/10 | 3,302,700 | 5,160 | Aug 2018 |
| 6 | mit.edu | 9.18/10 | 161,200 | 27,360 | Apr 2018 |
| 7 | nasa.gov | 9.15/10 | 2,715,500 | 372,280 | Aug 2018 |
| 8 | wiley.com | 9.14/10 | 76,900 | 33,308 | Aug 2018 |
| 9 | usda.gov | 9.14/10 | 476,600 | 147,178 | Aug 2018 |
| 10 | epa.gov | 9.13/10 | 3,848,900 | 707,207 | Jan 2019 |
| 11 | berkeley.edu | 9.10/10 | 166,900 | 5,412 | Aug 2018 |
| 12 | hhs.gov | 9.10/10 | 1,465,200 | 282,522 | Aug 2018 |
| 13 | canada.ca | 9.08/10 | 2,129,800 | 995,010 | Apr 2019 |
| 14 | noaa.gov | 9.07/10 | 1,258,800 | 144,262 | Aug 2022 |
| 15 | free.fr | 9.05/10 | 3,400 | 1,262 | Aug 2018 |
| 16 | uk.com | 9.00/10 | 2 | 12 | Apr 2018 |
| 17 | upenn.edu | 9.00/10 | 179,200 | 5,457 | Aug 2018 |
| 18 | princeton.edu | 8.98/10 | 246,800 | 50,700 | Aug 2018 |
| 19 | washington.edu | 8.96/10 | 668,000 | 107,419 | May 2018 |
| 20 | ethz.ch | 8.95/10 | 12,900 | 11,869 | Aug 2018 |
| 21 | sakura.ne.jp | 8.95/10 | - | - | Aug 2022 |
| 22 | fao.org | 8.93/10 | 213,900 | 125,762 | May 2019 |
| 23 | wa.gov | 8.93/10 | 719,800 | 8,195 | Aug 2018 |
| 24 | utexas.edu | 8.92/10 | 503,000 | 11,984 | Aug 2018 |
| 25 | uchicago.edu | 8.92/10 | 63,700 | 10,331 | Aug 2018 |
| 26 | mlit.go.jp | 8.92/10 | 11,100 | 6,476 | Jul 2019 |
| 27 | gov.ru | 8.91/10 | 2,700 | 216 | Aug 2018 |
| 28 | debian.org | 8.88/10 | 39,200 | 16,492 | Oct 2021 |
| 29 | duke.edu | 8.88/10 | 193,100 | 821 | Jan 2019 |
| 30 | azurewebsites.net | 8.87/10 | - | - | Apr 2019 |
| 31 | us.com | 8.86/10 | 32 | 9 | Jan 2019 |
| 32 | northwestern.edu | 8.86/10 | 193,400 | 45,922 | May 2020 |
| 33 | cancer.gov | 8.86/10 | 4,680,800 | 325,886 | Aug 2018 |
| 34 | umd.edu | 8.85/10 | 253,300 | 15,690 | Aug 2018 |
| 35 | ufl.edu | 8.84/10 | 241,600 | 3,624 | Sep 2018 |
| 36 | illinois.edu | 8.83/10 | 47,000 | 4,065 | Aug 2018 |
| 37 | ubuntu.com | 8.82/10 | 321,700 | 67,096 | Mar 2026 |
| 38 | mpg.de | 8.81/10 | 59,700 | 20,903 | Jan 2019 |
| 39 | undp.org | 8.81/10 | 220,100 | 57,922 | Aug 2018 |
| 40 | utoronto.ca | 8.81/10 | 42,800 | 10,094 | Aug 2018 |
| 41 | utah.gov | 8.80/10 | 129,900 | 27,432 | Aug 2018 |
| 42 | msu.edu | 8.78/10 | 149,500 | 2,641 | Aug 2018 |
| 43 | uci.edu | 8.76/10 | 94,700 | 9,859 | Aug 2018 |
| 44 | nielsen.com | 8.75/10 | 89,300 | 35,566 | Aug 2018 |
| 45 | army.mil | 8.75/10 | 1,049,000 | 286,727 | May 2026 |
| 46 | rutgers.edu | 8.75/10 | 147,400 | 31,478 | Aug 2018 |
| 47 | epfl.ch | 8.74/10 | 12,900 | 6,546 | Aug 2018 |
| 48 | brown.edu | 8.73/10 | 377,100 | 26,065 | Aug 2018 |
| 49 | virginia.edu | 8.73/10 | 265,200 | 11,663 | Aug 2018 |
| 50 | r-project.org | 8.72/10 | 37,800 | 4,574 | Aug 2018 |
| 51 | ncsu.edu | 8.72/10 | 155,900 | 15,968 | Aug 2018 |
| 52 | rochester.edu | 8.71/10 | 240,800 | 70,711 | 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 | pitt.edu | 8.69/10 | 62,900 | 8,815 | Jan 2023 |
| 57 | eplus.jp | 8.69/10 | 3,000 | 676 | Aug 2022 |
| 58 | unibo.it | 8.68/10 | 11,100 | 4,872 | Apr 2020 |
| 59 | gatech.edu | 8.68/10 | 72,600 | 12,653 | Aug 2018 |
| 60 | ky.gov | 8.68/10 | - | 1 | Apr 2023 |
| 61 | adp.com | 8.67/10 | 4,139,400 | 271,379 | Dec 2021 |
| 62 | uw.edu | 8.66/10 | - | - | Apr 2018 |
| 63 | caltech.edu | 8.65/10 | 148,700 | 22,852 | Aug 2018 |
| 64 | uga.edu | 8.65/10 | 234,400 | 2,908 | Aug 2018 |
| 65 | orange.fr | 8.64/10 | 2,600 | 209 | May 2022 |
| 66 | rlp.de | 8.63/10 | 210 | 110 | Feb 2024 |
| 67 | gencat.cat | 8.63/10 | 86 | 174 | Aug 2018 |
| 68 | chron.com | 8.62/10 | 342,500 | 316,084 | Jun 2024 |
| 69 | com.de | 8.62/10 | 5 | 14 | Jan 2019 |
| 70 | hawaii.edu | 8.62/10 | 117,100 | 43,233 | Aug 2018 |
| 71 | caa.go.jp | 8.62/10 | 94 | 118 | Jan 2022 |
| 72 | hrc.org | 8.61/10 | 261,400 | 55,663 | Dec 2023 |
| 73 | tum.de | 8.61/10 | 7,800 | 7,642 | Jul 2019 |
| 74 | kit.edu | 8.60/10 | 3,500 | 1,669 | Jul 2024 |
| 75 | ucm.es | 8.60/10 | 15,000 | 16,497 | Aug 2018 |
| 76 | iastate.edu | 8.60/10 | 161,300 | 18,508 | Aug 2018 |
| 77 | nii.ac.jp | 8.60/10 | 1,800 | 295 | Aug 2018 |
| 78 | unibe.ch | 8.60/10 | 4,700 | 1,336 | Aug 2018 |
| 79 | sc.gov | 8.59/10 | 132,100 | 22,114 | Aug 2018 |
| 80 | ahrq.gov | 8.59/10 | 136,400 | 42,617 | Oct 2024 |
| 81 | krakow.pl | 8.59/10 | 690 | 649 | May 2019 |
| 82 | csic.es | 8.59/10 | 1,200 | 2,107 | Aug 2018 |
| 83 | uni-heidelberg.de | 8.58/10 | 8,000 | 4,696 | Aug 2018 |
| 84 | unam.mx | 8.58/10 | 1,900 | 1,196 | Aug 2018 |
| 85 | cnr.it | 8.57/10 | 810 | 1,174 | Aug 2018 |
| 86 | kyoto-u.ac.jp | 8.57/10 | 4,800 | 3,548 | Aug 2018 |
| 87 | sfchronicle.com | 8.56/10 | 791,300 | 477,276 | Sep 2024 |
| 88 | nc.gov | 8.56/10 | 489,100 | 43,977 | Dec 2020 |
| 89 | gmu.edu | 8.56/10 | 143,500 | 30,472 | Aug 2018 |
| 90 | goethe.de | 8.56/10 | 39,200 | 35,320 | Dec 2025 |
| 91 | cuni.cz | 8.56/10 | 4,400 | 1,637 | Aug 2018 |
| 92 | gu.se | 8.56/10 | 18,300 | 8,934 | Sep 2018 |
| 93 | belgium.be | 8.55/10 | 20,400 | 1,736 | Oct 2022 |
| 94 | rwth-aachen.de | 8.55/10 | 640 | 1,476 | Aug 2018 |
| 95 | kuleuven.be | 8.54/10 | 4,900 | 4,889 | Nov 2018 |
| 96 | yorku.ca | 8.54/10 | 54,400 | 26,331 | Aug 2018 |
| 97 | spb.ru | 8.53/10 | - | - | Jan 2019 |
| 98 | uiuc.edu | 8.53/10 | 230 | 144 | Aug 2018 |
| 99 | osaka.lg.jp | 8.53/10 | - | - | Aug 2018 |
| 100 | su.se | 8.53/10 | 31,900 | 7,908 | 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) →