Websites Powered by Solr
1,151 websites tracked using Solr (Databases) · lucene.apache.org
Solr is a database system for storing application data. Its official site is lucene.apache.org. PoweredBy tracks the websites that use Solr across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the databases ecosystem.
Usage trend
200
400
600
Jun 2018
Jul 2020
Aug 2022
Aug 2024
Sep 2026
Domains observed using Solr in each month's HTTP Archive crawl,
Jun 2018 to Sep 2026 · peak 455 in Jun 2024. The tracked total above also
counts sites not re-crawled recently.
Core Web Vitals
LCP 1.6 s
INP 75 ms
CLS 0
TTFB 700 ms
Median site among 952 Solr sites with Chrome UX data, p75 values, Sep 2026.
Top countries
Indonesia
319
United States
307
Brazil
208
India
193
Spain
189
United Kingdom
182
Germany
180
Italy
178
Sites using Solr by audience country, Chrome UX Report.
Usage by industry
| Industry | Share | Websites |
|---|---|---|
| Government | 0.34% | 27 |
| Non-profit and religious | 0.01% | 1 |
| Arts and entertainment | <0.01% | 4 |
| Blogs and publishing | <0.01% | 1 |
| Education | <0.01% | 2 |
| News and media | <0.01% | 1 |
| Software and apps | <0.01% | 2 |
| Retail | <0.01% | 5 |
| Healthcare | <0.01% | 1 |
Share of each industry's websites with a detected stack that use Solr; industries come from what sites declare in their own structured data.
Top sites by authority
9+
<1% · 3 of 372 sites
8+
<1% · 48 of 7,677 sites
7+
<1% · 131 of 45,712 sites
6+
<1% · 192 of 110,136 sites
5+
<1% · 254 of 246,751 sites
The share of the web's most authoritative domains, by Open Page Rank tier, seen running Solr in recent crawls. Only 372 domains worldwide score 9 or higher.
Websites using Solr
| # | Domain | Open Page RankOPR | Est. monthly visits (US)Visits (US) | Keywords | First seen |
|---|---|---|---|---|---|
| 1 | ca.gov | 9.23/10 | 1,455,600 | 26,086 | Aug 2018 |
| 2 | nasa.gov | 9.15/10 | 2,697,400 | 289,920 | Apr 2025 |
| 3 | unesco.org | 9.06/10 | 294,400 | 71,304 | Oct 2024 |
| 4 | service.gov.uk | 8.99/10 | - | - | Sep 2022 |
| 5 | nsw.gov.au | 8.95/10 | 75,300 | 73,181 | Aug 2018 |
| 6 | gov.ru | 8.91/10 | 2,700 | 216 | Jul 2026 |
| 7 | nrw.de | 8.83/10 | - | - | Aug 2022 |
| 8 | virginia.gov | 8.82/10 | 338,000 | 19,778 | Feb 2024 |
| 9 | in.gov | 8.80/10 | 3,047,100 | 832,670 | May 2019 |
| 10 | unep.org | 8.78/10 | 189,100 | 71,991 | Aug 2026 |
| 11 | ontario.ca | 8.70/10 | 272,300 | 273,056 | Mar 2020 |
| 12 | hessen.de | 8.69/10 | 110 | 145 | Jan 2026 |
| 13 | unsw.edu.au | 8.69/10 | 77,400 | 61,319 | Dec 2022 |
| 14 | hawaii.gov | 8.67/10 | 34 | 238 | Sep 2020 |
| 15 | csic.es | 8.59/10 | 1,200 | 2,107 | Aug 2026 |
| 16 | wto.org | 8.58/10 | 234,600 | 39,569 | Jan 2026 |
| 17 | gov.on.ca | 8.57/10 | - | - | Aug 2022 |
| 18 | ucar.edu | 8.52/10 | 1,500 | 873 | Jul 2022 |
| 19 | nebraska.gov | 8.52/10 | 97,200 | 24,299 | Jan 2024 |
| 20 | ok.gov | 8.49/10 | 19,600 | 6,776 | Jul 2020 |
| 21 | iadb.org | 8.47/10 | 41,900 | 17,252 | Jun 2025 |
| 22 | nt.gov.au | 8.46/10 | 24,900 | 10,878 | Aug 2022 |
| 23 | pref.kanagawa.jp | 8.43/10 | 130 | 139 | Apr 2024 |
| 24 | yokohama.lg.jp | 8.41/10 | - | - | Jun 2020 |
| 25 | muenchen.de | 8.39/10 | 38,100 | 5,555 | Aug 2022 |
| 26 | bcb.gov.br | 8.36/10 | 83,600 | 15,876 | Aug 2018 |
| 27 | schleswig-holstein.de | 8.33/10 | 510 | 478 | Jan 2022 |
| 28 | miteco.gob.es | 8.30/10 | 3,600 | 8,935 | Oct 2025 |
| 29 | data.gov | 8.29/10 | 52,600 | 4,027 | Aug 2018 |
| 30 | stuttgart.de | 8.28/10 | 6,500 | 2,016 | Jul 2024 |
| 31 | um.es | 8.26/10 | 7,100 | 7,111 | Jun 2026 |
| 32 | unaids.org | 8.25/10 | 15,200 | 13,299 | Mar 2026 |
| 33 | boston.gov | 8.25/10 | 642,700 | 134,707 | Aug 2018 |
| 34 | regione.emilia-romagna.it | 8.23/10 | 290 | 307 | Jul 2021 |
| 35 | madrid.es | 8.22/10 | 5,200 | 11,494 | Mar 2026 |
| 36 | kobe.lg.jp | 8.19/10 | - | - | Aug 2018 |
| 37 | tse.jus.br | 8.18/10 | 15,900 | 3,390 | Jan 2022 |
| 38 | navarra.es | 8.17/10 | 2,600 | 4,406 | Mar 2022 |
| 39 | gov.mt | 8.13/10 | 3,400 | 1,456 | Feb 2026 |
| 40 | gifu.lg.jp | 8.12/10 | - | - | Jul 2020 |
| 41 | prefeitura.sp.gov.br | 8.07/10 | 3,800 | 5,554 | Jan 2019 |
| 42 | houstontx.gov | 8.05/10 | 615,100 | 189,553 | Aug 2018 |
| 43 | dgt.es | 8.04/10 | 2,800 | 11,201 | Jan 2022 |
| 44 | gov.md | 8.03/10 | 2,100 | 76 | Feb 2024 |
| 45 | buenosaires.gob.ar | 8.02/10 | 10,800 | 14,023 | Apr 2019 |
| 46 | uff.br | 8.02/10 | 56 | 156 | Nov 2022 |
| 47 | knmi.nl | 8.02/10 | 2,000 | 1,503 | Sep 2021 |
| 48 | city.sendai.jp | 8.01/10 | 740 | 67 | May 2024 |
| 49 | akita.lg.jp | 7.94/10 | - | - | May 2023 |
| 50 | leipzig.de | 7.88/10 | 480 | 1,045 | Jul 2021 |
| 51 | ufc.br | 7.85/10 | 280 | 529 | Oct 2025 |
| 52 | sanjoseca.gov | 7.83/10 | 391,200 | 52,901 | Sep 2020 |
| 53 | yukon.ca | 7.82/10 | 17,200 | 8,062 | Aug 2025 |
| 54 | mit.gov.it | 7.82/10 | 590 | 713 | Aug 2018 |
| 55 | renfe.com | 7.81/10 | 41,100 | 20,020 | Feb 2019 |
| 56 | miyazaki.lg.jp | 7.80/10 | - | - | Aug 2026 |
| 57 | ufrn.br | 7.80/10 | 37 | 165 | Jul 2019 |
| 58 | suomi.fi | 7.79/10 | 4,400 | 1,548 | Oct 2023 |
| 59 | stj.jus.br | 7.79/10 | 1,600 | 1,914 | Feb 2024 |
| 60 | ufpe.br | 7.78/10 | 42,700 | 34,698 | Dec 2025 |
| 61 | presidencia.gov.br | 7.77/10 | - | 2 | Aug 2022 |
| 62 | sanantonio.gov | 7.77/10 | 64,300 | 23,828 | Apr 2019 |
| 63 | ufscar.br | 7.77/10 | 150 | 114 | Dec 2022 |
| 64 | milwaukee.gov | 7.76/10 | 5,000 | 1,159 | Mar 2020 |
| 65 | moph.go.th | 7.75/10 | 8 | 9 | Nov 2022 |
| 66 | vegvesen.no | 7.75/10 | 750 | 1,588 | Sep 2021 |
| 67 | mma.gov.br | 7.75/10 | - | - | Jul 2022 |
| 68 | karlsruhe.de | 7.73/10 | 73 | 262 | Nov 2023 |
| 69 | ufg.br | 7.73/10 | 120 | 217 | Oct 2023 |
| 70 | unc.edu.ar | 7.70/10 | 620 | 954 | Jan 2025 |
| 71 | montreal.ca | 7.69/10 | 31,500 | 8,760 | Apr 2023 |
| 72 | city.sagamihara.kanagawa.jp | 7.65/10 | 8 | 15 | Sep 2024 |
| 73 | unex.es | 7.65/10 | 770 | 484 | Jan 2021 |
| 74 | ingv.it | 7.61/10 | 380 | 729 | Jan 2021 |
| 75 | valencia.es | 7.52/10 | 470 | 1,606 | Apr 2026 |
| 76 | unifesp.br | 7.51/10 | 9 | 22 | Oct 2022 |
| 77 | cvm.gov.br | 7.47/10 | - | - | May 2019 |
| 78 | ufv.br | 7.47/10 | 68 | 68 | Jul 2025 |
| 79 | city.fukuyama.hiroshima.jp | 7.46/10 | 47 | 23 | Jul 2021 |
| 80 | gba.gob.ar | 7.45/10 | 2,800 | 6,640 | May 2020 |
| 81 | aachen.de | 7.45/10 | 110 | 116 | Aug 2022 |
| 82 | agricultura.gov.br | 7.44/10 | - | 3 | Oct 2021 |
| 83 | kyivcity.gov.ua | 7.43/10 | 120 | 86 | May 2026 |
| 84 | malaga.eu | 7.42/10 | 290 | 787 | Aug 2018 |
| 85 | ibama.gov.br | 7.42/10 | 29 | 68 | Jan 2019 |
| 86 | gov.je | 7.41/10 | 49,400 | 18,038 | May 2020 |
| 87 | giustizia-amministrativa.it | 7.41/10 | 37 | 180 | Jan 2025 |
| 88 | rd.go.th | 7.40/10 | 1,500 | 647 | Dec 2023 |
| 89 | aneel.gov.br | 7.40/10 | - | 3 | May 2022 |
| 90 | cultura.gov.br | 7.40/10 | - | - | Jan 2019 |
| 91 | turismo.gov.br | 7.38/10 | - | 9 | Aug 2022 |
| 92 | santamonica.gov | 7.37/10 | 213,800 | 20,551 | Jan 2023 |
| 93 | publications.qld.gov.au | 7.35/10 | 3,100 | 4,112 | Sep 2019 |
| 94 | nectec.or.th | 7.33/10 | 34 | 128 | Apr 2026 |
| 95 | pbh.gov.br | 7.33/10 | - | 6 | Feb 2020 |
| 96 | antt.gov.br | 7.32/10 | - | - | Dec 2020 |
| 97 | toll.no | 7.31/10 | 1,200 | 1,148 | Dec 2022 |
| 98 | vigilfuoco.it | 7.31/10 | 160 | 536 | Jun 2026 |
| 99 | landcareresearch.co.nz | 7.30/10 | 12,700 | 5,726 | Aug 2022 |
| 100 | kemenperin.go.id | 7.30/10 | 12 | 4 | Jul 2026 |
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).