Websites Powered by Zimbra
5,533 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
Feb 2024
May 2025
Aug 2026
Domains observed using Zimbra in each month's HTTP Archive crawl,
Aug 2021 to Aug 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 4,670 Zimbra sites with Chrome UX data, p75 values, Aug 2026.
Top countries
United States
840
Brazil
817
India
718
Indonesia
695
Italy
515
France
514
Germany
440
Spain
418
Sites using Zimbra by audience country, Chrome UX Report.
Top sites by authority
9+
0% · 0 of 372 sites
8+
<1% · 38 of 7,677 sites
7+
<1% · 156 of 45,712 sites
6+
<1% · 274 of 110,136 sites
5+
<1% · 420 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 | 412,200 | 14,756 | 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 | 320,300 | 77,595 | 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 | spb.ru | 8.53/10 | - | - | Oct 2021 |
| 10 | ovh.net | 8.51/10 | - | - | Jul 2024 |
| 11 | poznan.pl | 8.47/10 | 320 | 564 | Aug 2022 |
| 12 | ugent.be | 8.42/10 | 3,800 | 3,554 | Nov 2022 |
| 13 | cnpq.br | 8.42/10 | - | - | Aug 2021 |
| 14 | wolfram.com | 8.37/10 | 26,500 | 8,954 | Aug 2022 |
| 15 | lodz.pl | 8.37/10 | 90 | 193 | May 2022 |
| 16 | wroc.pl | 8.36/10 | - | - | Nov 2021 |
| 17 | ufmg.br | 8.36/10 | 3,300 | 1,765 | Aug 2022 |
| 18 | istat.it | 8.33/10 | 2,000 | 1,933 | Jan 2024 |
| 19 | cas.cz | 8.33/10 | - | - | Oct 2022 |
| 20 | up.pt | 8.30/10 | 2,100 | 1,076 | Aug 2021 |
| 21 | univ-tours.fr | 8.29/10 | 140 | 358 | Sep 2021 |
| 22 | mnhn.fr | 8.27/10 | 6,300 | 2,744 | Aug 2025 |
| 23 | cwi.nl | 8.26/10 | 1,200 | 631 | Sep 2021 |
| 24 | camera.it | 8.26/10 | 180 | 596 | Sep 2021 |
| 25 | uba.ar | 8.21/10 | 670 | 586 | Sep 2022 |
| 26 | uc.pt | 8.21/10 | 3,500 | 1,118 | Apr 2022 |
| 27 | afip.gob.ar | 8.13/10 | 3,500 | 5,448 | Sep 2021 |
| 28 | univ-lyon1.fr | 8.12/10 | 930 | 492 | Apr 2023 |
| 29 | isciii.es | 8.12/10 | 130 | 323 | Mar 2024 |
| 30 | pucp.edu.pe | 8.06/10 | 930 | 1,075 | Apr 2024 |
| 31 | sjtu.edu.cn | 8.05/10 | 22 | 9 | Aug 2026 |
| 32 | iitm.ac.in | 8.05/10 | 2,400 | 2,322 | Feb 2024 |
| 33 | ufba.br | 8.04/10 | 99 | 104 | Oct 2022 |
| 34 | ui.ac.id | 8.04/10 | 190 | 21 | Oct 2023 |
| 35 | gov.md | 8.03/10 | 2,100 | 76 | Sep 2021 |
| 36 | msu.ru | 8.02/10 | 4,500 | 86 | Jul 2023 |
| 37 | bg.ac.rs | 8.02/10 | 68 | 28 | Sep 2021 |
| 38 | zimbra.com | 8.00/10 | 4,600 | 284 | Sep 2021 |
| 39 | health.gov.lk | 7.99/10 | 1,000 | 1,345 | Oct 2021 |
| 40 | douane.gouv.fr | 7.99/10 | 2,800 | 2,192 | Aug 2022 |
| 41 | unlp.edu.ar | 7.99/10 | 960 | 1,360 | Sep 2021 |
| 42 | infn.it | 7.99/10 | 900 | 585 | Aug 2022 |
| 43 | cdmx.gob.mx | 7.96/10 | 1,900 | 1,510 | Aug 2021 |
| 44 | kerala.gov.in | 7.94/10 | 540 | 50 | Sep 2021 |
| 45 | tubitak.gov.tr | 7.92/10 | 830 | 799 | Sep 2021 |
| 46 | iitkgp.ac.in | 7.90/10 | 580 | 618 | Sep 2021 |
| 47 | college-de-france.fr | 7.90/10 | 2,400 | 2,124 | Sep 2021 |
| 48 | in2p3.fr | 7.86/10 | - | - | Aug 2022 |
| 49 | kemkes.go.id | 7.85/10 | 200 | 256 | Sep 2021 |
| 50 | regione.sicilia.it | 7.83/10 | 1,200 | 834 | Aug 2024 |
| 51 | vutbr.cz | 7.82/10 | 4 | 1 | Aug 2022 |
| 52 | tradeindia.com | 7.81/10 | 19,800 | 80,328 | Sep 2021 |
| 53 | difesa.it | 7.80/10 | 360 | 646 | Sep 2021 |
| 54 | euronet.nl | 7.79/10 | 100 | 52 | Oct 2022 |
| 55 | upmc.fr | 7.78/10 | - | - | Nov 2022 |
| 56 | gijon.es | 7.75/10 | 240 | 973 | May 2023 |
| 57 | univ-poitiers.fr | 7.75/10 | 200 | 117 | Oct 2022 |
| 58 | u-bourgogne.fr | 7.74/10 | - | - | Sep 2021 |
| 59 | ufpb.br | 7.72/10 | 220 | 478 | Sep 2021 |
| 60 | nask.pl | 7.71/10 | 100 | 78 | Aug 2022 |
| 61 | grenoble-inp.fr | 7.71/10 | 96 | 168 | Sep 2021 |
| 62 | brin.go.id | 7.68/10 | 360 | 493 | Mar 2022 |
| 63 | dost.gov.ph | 7.66/10 | 620 | 1,187 | Nov 2022 |
| 64 | univ-fcomte.fr | 7.66/10 | - | - | Sep 2021 |
| 65 | polymtl.ca | 7.64/10 | 1,400 | 1,052 | Sep 2021 |
| 66 | polri.go.id | 7.63/10 | 82 | 159 | Nov 2021 |
| 67 | renater.fr | 7.62/10 | 19 | 62 | Sep 2021 |
| 68 | regione.sardegna.it | 7.59/10 | 150 | 241 | Sep 2021 |
| 69 | uhu.es | 7.53/10 | 990 | 1,923 | Sep 2021 |
| 70 | valencia.es | 7.52/10 | 470 | 1,606 | Sep 2021 |
| 71 | hrt.hr | 7.48/10 | 800 | 226 | Sep 2021 |
| 72 | infocert.it | 7.47/10 | 39 | 122 | Sep 2021 |
| 73 | geomar.de | 7.47/10 | 6,200 | 2,203 | Sep 2021 |
| 74 | insa-lyon.fr | 7.47/10 | 300 | 400 | Sep 2021 |
| 75 | marinha.mil.br | 7.47/10 | 1,500 | 2,083 | Sep 2021 |
| 76 | imt.fr | 7.46/10 | 82 | 41 | Sep 2021 |
| 77 | uni-sofia.bg | 7.46/10 | 250 | 215 | Sep 2021 |
| 78 | uvsq.fr | 7.46/10 | 320 | 387 | Aug 2024 |
| 79 | komdigi.go.id | 7.45/10 | 550 | 497 | Mar 2025 |
| 80 | gba.gob.ar | 7.45/10 | 2,800 | 6,640 | Oct 2021 |
| 81 | cgt.fr | 7.45/10 | 61 | 230 | Sep 2021 |
| 82 | eb.mil.br | 7.45/10 | 430 | 425 | Sep 2021 |
| 83 | well.com | 7.44/10 | 13,800 | 93 | Aug 2021 |
| 84 | rnu.tn | 7.44/10 | - | - | Sep 2021 |
| 85 | regione.calabria.it | 7.44/10 | 870 | 259 | Aug 2022 |
| 86 | unr.edu.ar | 7.44/10 | 770 | 966 | Sep 2021 |
| 87 | kemlu.go.id | 7.43/10 | 4,600 | 1,105 | Sep 2025 |
| 88 | telesurtv.net | 7.43/10 | 3,000 | 5,487 | Sep 2021 |
| 89 | esdm.go.id | 7.43/10 | 190 | 287 | Sep 2021 |
| 90 | mta.hu | 7.42/10 | 83 | 137 | Nov 2022 |
| 91 | jatengprov.go.id | 7.42/10 | 590 | 444 | Sep 2021 |
| 92 | eonet.jp | 7.41/10 | 210 | 59 | Aug 2022 |
| 93 | mfa.go.th | 7.40/10 | 4,900 | 1,379 | Apr 2022 |
| 94 | ifce.fr | 7.39/10 | 630 | 371 | Sep 2024 |
| 95 | gp.gov.ua | 7.39/10 | 21 | 46 | Nov 2022 |
| 96 | ipsl.fr | 7.39/10 | 410 | 120 | Aug 2022 |
| 97 | inpi.gov.br | 7.37/10 | - | 1 | Dec 2021 |
| 98 | atilf.fr | 7.37/10 | 1 | 17 | May 2026 |
| 99 | iijmio.jp | 7.36/10 | 480 | 313 | Aug 2022 |
| 100 | kemendagri.go.id | 7.35/10 | - | - | Oct 2023 |
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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