Websites Powered by ZK
653 websites tracked using ZK (Web frameworks) · zkoss.org
ZK is a web application framework used to build the site's backend. Its official site is zkoss.org. PoweredBy tracks the websites that use ZK across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the web frameworks ecosystem.
Usage trend
100
200
300
400
Apr 2018
May 2020
Jul 2022
Aug 2024
Sep 2026
Domains observed using ZK in each month's HTTP Archive crawl,
Apr 2018 to Sep 2026 · peak 306 in Aug 2022. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.9 s
INP 75 ms
CLS 0
TTFB 650 ms
Median site among 490 ZK sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
159
Brazil
95
Italy
91
Germany
90
Spain
81
United Kingdom
81
Indonesia
76
India
73
Sites using ZK by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Government | 0.04% | 3 |
| Finance and insurance | 0.01% | 2 |
| Sports and fitness | <0.01% | 1 |
| Blogs and publishing | <0.01% | 1 |
| Education | <0.01% | 2 |
| Beauty and wellness | <0.01% | 1 |
| Real estate | <0.01% | 2 |
| Automotive | <0.01% | 1 |
| Travel and hospitality | <0.01% | 1 |
| Healthcare | <0.01% | 1 |
| Retail | <0.01% | 1 |
Share of each industry's websites with a detected stack that use ZK; industries come from what sites declare in their own structured data.
Top sites by authority
9+
0% · 0 of 372 sites
8+
<1% · 8 of 7,677 sites
7+
<1% · 24 of 45,712 sites
6+
<1% · 41 of 110,136 sites
5+
<1% · 61 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running ZK in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using ZK
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | umn.edu | 8.96/10 | 78 | 51 | Feb 2023 |
| 2 | niedersachsen.de | 8.65/10 | 49 | 98 | Mar 2024 |
| 3 | gva.es | 8.47/10 | 490 | 1,924 | Jan 2019 |
| 4 | unil.ch | 8.47/10 | 2,600 | 1,615 | Aug 2018 |
| 5 | sebrae.com.br | 8.32/10 | 1,800 | 3,151 | Aug 2018 |
| 6 | uba.ar | 8.21/10 | 670 | 586 | Oct 2020 |
| 7 | ufba.br | 8.04/10 | 99 | 104 | May 2026 |
| 8 | rajasthan.gov.in | 8.01/10 | 3,100 | 236 | Aug 2018 |
| 9 | regione.piemonte.it | 7.96/10 | 450 | 1,080 | Feb 2020 |
| 10 | regione.veneto.it | 7.95/10 | 110 | 339 | Feb 2022 |
| 11 | lwl.org | 7.92/10 | 110 | 383 | Mar 2026 |
| 12 | regione.lazio.it | 7.78/10 | 270 | 609 | Aug 2018 |
| 13 | arnes.si | 7.53/10 | 150 | 12 | Aug 2018 |
| 14 | pucpr.br | 7.52/10 | 300 | 464 | Dec 2020 |
| 15 | vmi.lt | 7.46/10 | 640 | 406 | Aug 2018 |
| 16 | yok.gov.tr | 7.44/10 | 240 | 89 | Aug 2018 |
| 17 | lcsd.gov.hk | 7.42/10 | 4,500 | 1,795 | Aug 2018 |
| 18 | moit.gov.vn | 7.40/10 | 560 | 1,086 | Aug 2018 |
| 19 | pbh.gov.br | 7.33/10 | - | 6 | Jul 2024 |
| 20 | tennis.de | 7.30/10 | 270 | 756 | Apr 2024 |
| 21 | beacukai.go.id | 7.17/10 | 1,300 | 618 | Sep 2021 |
| 22 | minagric.gr | 7.02/10 | 22 | 94 | Dec 2020 |
| 23 | mendoza.gov.ar | 7.02/10 | 2,300 | 4,067 | Dec 2020 |
| 24 | uinjkt.ac.id | 7.02/10 | 150 | 235 | Aug 2018 |
| 25 | upc.edu.pe | 6.90/10 | 460 | 741 | Jul 2026 |
| 26 | dypa.gov.gr | 6.84/10 | 97 | 174 | Aug 2025 |
| 27 | cardiff.gov.uk | 6.72/10 | 2,100 | 909 | Jun 2023 |
| 28 | comune.parma.it | 6.71/10 | 460 | 336 | Oct 2023 |
| 29 | imt-ip.pt | 6.70/10 | 28 | 45 | May 2023 |
| 30 | danang.gov.vn | 6.53/10 | 550 | 1,418 | Apr 2020 |
| 31 | upaep.mx | 6.50/10 | 460 | 421 | Aug 2018 |
| 32 | belavia.by | 6.46/10 | 240 | 21 | Feb 2020 |
| 33 | pointclickcare.com | 6.39/10 | 109,300 | 6,179 | Aug 2018 |
| 34 | myrealtyonegroup.com | 6.37/10 | - | - | Aug 2022 |
| 35 | compass-usa.com | 6.29/10 | 32,900 | 35,481 | Dec 2020 |
| 36 | vivacom.bg | 6.27/10 | 290 | 105 | Aug 2018 |
| 37 | pami.org.ar | 6.24/10 | 830 | 4,985 | Aug 2018 |
| 38 | nbnatlas.org | 6.22/10 | 3 | 17 | Dec 2020 |
| 39 | payulatam.com | 6.18/10 | - | - | Aug 2018 |
| 40 | artdatabanken.se | 6.17/10 | - | - | Nov 2022 |
| 41 | uralairlines.ru | 6.03/10 | 620 | 384 | Aug 2018 |
| 42 | uzairways.com | 5.99/10 | 8,900 | 7,430 | Dec 2020 |
| 43 | entrerios.gov.ar | 5.97/10 | 260 | 926 | Apr 2025 |
| 44 | bvhttdl.gov.vn | 5.95/10 | 470 | 2,039 | Dec 2020 |
| 45 | kamusm.gov.tr | 5.93/10 | - | - | Feb 2023 |
| 46 | ktimatologio.gr | 5.93/10 | 270 | 110 | Aug 2024 |
| 47 | porthouston.com | 5.90/10 | 26,600 | 6,081 | Sep 2024 |
| 48 | jpj.gov.my | 5.88/10 | 500 | 363 | Aug 2018 |
| 49 | prodemge.gov.br | 5.80/10 | 360 | 25 | Apr 2020 |
| 50 | lrmuitine.lt | 5.79/10 | 44 | 39 | Aug 2023 |
| 51 | pkm.gov.gr | 5.77/10 | 1 | 16 | Sep 2022 |
| 52 | tierradelfuego.gob.ar | 5.73/10 | 110 | 194 | Aug 2025 |
| 53 | queretaro.gob.mx | 5.64/10 | 110 | 67 | Dec 2020 |
| 54 | plovdiv.bg | 5.58/10 | 1,100 | 34 | Aug 2018 |
| 55 | tnu.edu.vn | 5.56/10 | 3 | 5 | Jul 2026 |
| 56 | halal.go.id | 5.41/10 | - | - | Dec 2025 |
| 57 | fptindustrial.com | 5.31/10 | 710 | 202 | Jan 2023 |
| 58 | khanhhoa.gov.vn | 5.28/10 | 48 | 10 | Aug 2026 |
| 59 | scat.kz | 5.27/10 | 460 | 495 | Aug 2018 |
| 60 | cimb.com | 5.16/10 | 360 | 228 | Feb 2025 |
| 61 | yakutia.aero | 5.11/10 | 89 | 12 | Sep 2021 |
| 62 | gouv.td | 4.75/10 | - | - | Mar 2023 |
| 63 | port.venice.it | 4.75/10 | - | - | Feb 2022 |
| 64 | odnq.org | 4.69/10 | - | - | Mar 2022 |
| 65 | peelports.com | 4.69/10 | - | - | Dec 2020 |
| 66 | oeq.org | 4.69/10 | - | - | Apr 2019 |
| 67 | e-pal.it | 4.27/10 | - | - | Jul 2024 |
| 68 | midwestcityok.org | 4.19/10 | - | - | Sep 2022 |
| 69 | nordstar.ru | 4.17/10 | - | - | Jan 2025 |
| 70 | ciudaddemendoza.gob.ar | 4.12/10 | - | - | Oct 2025 |
| 71 | elga.gr | 4.10/10 | - | - | May 2022 |
| 72 | isyatirim.com.tr | 4.08/10 | - | - | Nov 2022 |
| 73 | vatzum.lt | 4.03/10 | - | - | Jul 2021 |
| 74 | nls.fi | 3.98/10 | - | - | Jun 2024 |
| 75 | vcalc.com | 3.95/10 | - | - | Nov 2019 |
| 76 | saneago.com.br | 3.95/10 | - | - | Feb 2020 |
| 77 | albank.ru | 3.92/10 | - | - | Aug 2018 |
| 78 | pepsicopartners.com | 3.89/10 | - | - | May 2026 |
| 79 | o-a-q.org | 3.87/10 | - | - | Jul 2023 |
| 80 | centrum-air.com | 3.87/10 | - | - | Sep 2026 |
| 81 | sde.gob.ar | 3.86/10 | - | - | Jun 2021 |
| 82 | institutpf.org | 3.71/10 | - | - | Sep 2024 |
| 83 | ipsemg.mg.gov.br | 3.68/10 | - | - | Jul 2023 |
| 84 | aljt.com | 3.67/10 | 31 | 239 | Aug 2018 |
| 85 | snowpro.com | 3.65/10 | - | - | Dec 2020 |
| 86 | bilsport.no | 3.57/10 | 15 | 99 | Feb 2026 |
| 87 | copyright.co.nz | 3.57/10 | - | - | Aug 2026 |
| 88 | ohdq.com | 3.54/10 | - | - | Feb 2025 |
| 89 | adma.qc.ca | 3.53/10 | - | 14 | Apr 2024 |
| 90 | uajms.edu.bo | 3.51/10 | - | - | Sep 2020 |
| 91 | cagef.mg.gov.br | 3.50/10 | - | - | Feb 2019 |
| 92 | insai.gob.ve | 3.49/10 | - | - | Aug 2018 |
| 93 | ushuaia.gob.ar | 3.49/10 | - | - | Dec 2023 |
| 94 | fifgroup.co.id | 3.48/10 | - | - | Feb 2025 |
| 95 | eracom.com.tw | 3.46/10 | - | - | Jul 2026 |
| 96 | geopp.de | 3.45/10 | - | - | Apr 2025 |
| 97 | otimroepmq.ca | 3.45/10 | - | - | Jan 2019 |
| 98 | ptp.com.my | 3.41/10 | - | - | Sep 2021 |
| 99 | ravnaqbank.uz | 3.34/10 | - | - | Aug 2022 |
| 100 | faleconosco.mg.gov.br | 3.34/10 | - | - | 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) →
Columns: domain, Open Page Rank, first seen, last seen, industry (from the site's own structured data, blank when none).