Websites Powered by Zimbra
5,551 websites tracked using Zimbra (Webmail) · www.zimbra.com
Zimbra is a webmail interface for reading email in a browser. Its official site is zimbra.com. PoweredBy tracks the websites that use Zimbra 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
1K
2K
3K
Aug 2021
Nov 2022
Mar 2024
Jun 2025
Sep 2026
Domains observed using Zimbra in each month's HTTP Archive crawl,
Aug 2021 to Sep 2026 · peak 2,900 in Nov 2022. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.7 s
INP 100 ms
CLS 0
TTFB 600 ms
Median site among 4,677 Zimbra sites with Chrome UX data, p75 values, Sep 2026.
Top countries
United States
848
Brazil
809
India
708
Indonesia
684
France
519
Italy
514
Germany
458
Spain
423
Sites using Zimbra by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Government | 0.30% | 24 |
| Finance and insurance | 0.04% | 6 |
| Education | 0.03% | 17 |
| Industrial and manufacturing | 0.02% | 1 |
| News and media | 0.02% | 7 |
| Professional services | 0.01% | 6 |
| Non-profit and religious | 0.01% | 1 |
| Arts and entertainment | 0.01% | 5 |
| Healthcare | <0.01% | 6 |
| Automotive | <0.01% | 3 |
| Software and apps | <0.01% | 5 |
| Real estate | <0.01% | 3 |
Share of each industry's websites with a detected stack that use Zimbra; industries come from what sites declare in their own structured data.
Top sites by authority
9+
0% · 0 of 372 sites
8+
<1% · 35 of 7,677 sites
7+
<1% · 149 of 45,712 sites
6+
<1% · 264 of 110,136 sites
5+
<1% · 410 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Zimbra in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Zimbra
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | ucla.edu | 8.93/10 | 410,700 | 13,782 | Jul 2023 |
| 2 | cnrs.fr | 8.82/10 | 4,300 | 2,992 | Sep 2021 |
| 3 | mpg.de | 8.81/10 | 59,700 | 20,903 | Nov 2021 |
| 4 | amnesty.org | 8.75/10 | 316,300 | 65,505 | Jan 2022 |
| 5 | aruba.it | 8.72/10 | 1,000 | 466 | Sep 2021 |
| 6 | u-tokyo.ac.jp | 8.71/10 | 25,200 | 7,795 | Sep 2021 |
| 7 | vatican.va | 8.68/10 | 614,500 | 268,554 | Aug 2021 |
| 8 | unam.mx | 8.58/10 | 1,900 | 1,196 | Aug 2021 |
| 9 | ovh.net | 8.51/10 | - | - | Jul 2024 |
| 10 | poznan.pl | 8.47/10 | 320 | 564 | Aug 2022 |
| 11 | ugent.be | 8.42/10 | 3,800 | 3,554 | Nov 2022 |
| 12 | cnpq.br | 8.42/10 | - | - | Aug 2021 |
| 13 | wolfram.com | 8.37/10 | 26,500 | 8,954 | Aug 2022 |
| 14 | lodz.pl | 8.37/10 | 90 | 193 | May 2022 |
| 15 | wroc.pl | 8.36/10 | - | - | Nov 2021 |
| 16 | ufmg.br | 8.36/10 | 3,300 | 1,765 | Aug 2022 |
| 17 | istat.it | 8.33/10 | 2,000 | 1,933 | Jan 2024 |
| 18 | cas.cz | 8.33/10 | - | - | Oct 2022 |
| 19 | up.pt | 8.30/10 | 2,100 | 1,076 | Aug 2021 |
| 20 | univ-tours.fr | 8.29/10 | 140 | 358 | Sep 2021 |
| 21 | mnhn.fr | 8.27/10 | 6,300 | 2,744 | Aug 2025 |
| 22 | cwi.nl | 8.26/10 | 1,200 | 631 | Sep 2021 |
| 23 | camera.it | 8.26/10 | 180 | 596 | Sep 2021 |
| 24 | uba.ar | 8.21/10 | 670 | 586 | Sep 2022 |
| 25 | uc.pt | 8.21/10 | 3,500 | 1,118 | Apr 2022 |
| 26 | afip.gob.ar | 8.13/10 | 3,500 | 5,448 | Sep 2021 |
| 27 | univ-lyon1.fr | 8.12/10 | 930 | 492 | Apr 2023 |
| 28 | isciii.es | 8.12/10 | 130 | 323 | Mar 2024 |
| 29 | pucp.edu.pe | 8.06/10 | 930 | 1,075 | Apr 2024 |
| 30 | sjtu.edu.cn | 8.05/10 | 22 | 9 | Aug 2026 |
| 31 | iitm.ac.in | 8.05/10 | 2,400 | 2,322 | Feb 2024 |
| 32 | ufba.br | 8.04/10 | 99 | 104 | Oct 2022 |
| 33 | ui.ac.id | 8.04/10 | 190 | 21 | Oct 2023 |
| 34 | gov.md | 8.03/10 | 2,100 | 76 | Sep 2021 |
| 35 | bg.ac.rs | 8.02/10 | 68 | 28 | Sep 2021 |
| 36 | health.gov.lk | 7.99/10 | 1,000 | 1,345 | Oct 2021 |
| 37 | douane.gouv.fr | 7.99/10 | 2,800 | 2,192 | Aug 2022 |
| 38 | unlp.edu.ar | 7.99/10 | 960 | 1,360 | Sep 2021 |
| 39 | infn.it | 7.99/10 | 900 | 585 | Aug 2022 |
| 40 | cdmx.gob.mx | 7.96/10 | 1,900 | 1,510 | Aug 2021 |
| 41 | kerala.gov.in | 7.94/10 | 540 | 50 | Sep 2021 |
| 42 | tubitak.gov.tr | 7.92/10 | 830 | 799 | Sep 2021 |
| 43 | iitkgp.ac.in | 7.90/10 | 580 | 618 | Sep 2021 |
| 44 | college-de-france.fr | 7.90/10 | 2,400 | 2,124 | Sep 2021 |
| 45 | kemkes.go.id | 7.85/10 | 200 | 256 | Sep 2021 |
| 46 | regione.sicilia.it | 7.83/10 | 1,200 | 834 | Aug 2024 |
| 47 | vutbr.cz | 7.82/10 | 4 | 1 | Aug 2022 |
| 48 | tradeindia.com | 7.81/10 | 19,800 | 80,328 | Sep 2021 |
| 49 | difesa.it | 7.80/10 | 360 | 646 | Sep 2021 |
| 50 | euronet.nl | 7.79/10 | 100 | 52 | Oct 2022 |
| 51 | upmc.fr | 7.78/10 | - | - | Nov 2022 |
| 52 | gijon.es | 7.75/10 | 240 | 973 | May 2023 |
| 53 | univ-poitiers.fr | 7.75/10 | 200 | 117 | Oct 2022 |
| 54 | u-bourgogne.fr | 7.74/10 | - | - | Sep 2021 |
| 55 | ufpb.br | 7.72/10 | 220 | 478 | Sep 2021 |
| 56 | nask.pl | 7.71/10 | 100 | 78 | Aug 2022 |
| 57 | grenoble-inp.fr | 7.71/10 | 96 | 168 | Sep 2021 |
| 58 | dost.gov.ph | 7.66/10 | 620 | 1,187 | Nov 2022 |
| 59 | univ-fcomte.fr | 7.66/10 | - | - | Sep 2021 |
| 60 | polri.go.id | 7.63/10 | 82 | 159 | Nov 2021 |
| 61 | renater.fr | 7.62/10 | 19 | 62 | Sep 2021 |
| 62 | regione.sardegna.it | 7.59/10 | 150 | 241 | Sep 2021 |
| 63 | uhu.es | 7.53/10 | 990 | 1,923 | Sep 2021 |
| 64 | valencia.es | 7.52/10 | 470 | 1,606 | Sep 2021 |
| 65 | hrt.hr | 7.48/10 | 800 | 226 | Sep 2021 |
| 66 | infocert.it | 7.47/10 | 39 | 122 | Sep 2021 |
| 67 | geomar.de | 7.47/10 | 6,200 | 2,203 | Sep 2021 |
| 68 | insa-lyon.fr | 7.47/10 | 300 | 400 | Sep 2021 |
| 69 | marinha.mil.br | 7.47/10 | 1,500 | 2,083 | Sep 2021 |
| 70 | imt.fr | 7.46/10 | 82 | 41 | Sep 2021 |
| 71 | uni-sofia.bg | 7.46/10 | 250 | 215 | Sep 2021 |
| 72 | uvsq.fr | 7.46/10 | 320 | 387 | Aug 2024 |
| 73 | komdigi.go.id | 7.45/10 | 550 | 497 | Mar 2025 |
| 74 | gba.gob.ar | 7.45/10 | 2,800 | 6,640 | Oct 2021 |
| 75 | cgt.fr | 7.45/10 | 61 | 230 | Sep 2021 |
| 76 | eb.mil.br | 7.45/10 | 430 | 425 | Sep 2021 |
| 77 | well.com | 7.44/10 | 13,800 | 86 | Aug 2021 |
| 78 | rnu.tn | 7.44/10 | - | - | Sep 2021 |
| 79 | regione.calabria.it | 7.44/10 | 870 | 259 | Aug 2022 |
| 80 | unr.edu.ar | 7.44/10 | 770 | 966 | Sep 2021 |
| 81 | kemlu.go.id | 7.43/10 | 4,600 | 1,105 | Sep 2025 |
| 82 | telesurtv.net | 7.43/10 | 3,000 | 5,487 | Sep 2021 |
| 83 | esdm.go.id | 7.43/10 | 190 | 287 | Sep 2021 |
| 84 | mta.hu | 7.42/10 | 83 | 137 | Nov 2022 |
| 85 | jatengprov.go.id | 7.42/10 | 590 | 444 | Sep 2021 |
| 86 | eonet.jp | 7.41/10 | 210 | 59 | Aug 2022 |
| 87 | mfa.go.th | 7.40/10 | 4,900 | 1,379 | Apr 2022 |
| 88 | ifce.fr | 7.39/10 | 630 | 371 | Sep 2024 |
| 89 | gp.gov.ua | 7.39/10 | 21 | 46 | Nov 2022 |
| 90 | ipsl.fr | 7.39/10 | 410 | 120 | Aug 2022 |
| 91 | inpi.gov.br | 7.37/10 | - | 1 | Dec 2021 |
| 92 | iijmio.jp | 7.36/10 | 480 | 313 | Aug 2022 |
| 93 | kemendagri.go.id | 7.35/10 | - | - | Oct 2023 |
| 94 | jalisco.gob.mx | 7.34/10 | 2,100 | 1,541 | Oct 2022 |
| 95 | utn.edu.ar | 7.34/10 | 500 | 212 | Sep 2021 |
| 96 | udelar.edu.uy | 7.32/10 | 240 | 197 | Oct 2021 |
| 97 | jatimprov.go.id | 7.32/10 | 10 | 10 | Nov 2022 |
| 98 | vigilfuoco.it | 7.31/10 | 160 | 536 | Aug 2025 |
| 99 | ni.ac.rs | 7.31/10 | 71 | 25 | Nov 2021 |
| 100 | goias.gov.br | 7.28/10 | 1,800 | 3,571 | Sep 2021 |
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).
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