59 live Koha 21.x sites, ready to export.
That's how many Koha 21.x websites are in VersionDB right now, each with its full tech stack, contact details, and social profiles.
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Every Koha 21.x website we detected in the Czech Republic.
Only sites where a business, company-hosted email was found.
Sites with at least one business LinkedIn profile.
Start with the highest-traffic end of the dataset.
Limit results to Koha 21.x websites on .com domains.
Which Koha 21.x versions are most used?
We could read a version number on 39% of Koha 21.x sites. Of those, the most common are Koha 21.1123000, on 18 sites and Koha 21.1100000, on 5 sites.
- Versions detected
- 2
- Sites with a version
- 23
Websites Using Koha 21.x
A sample of live Koha 21.x sites from our latest crawl, with the other technologies each one runs.
| Domain | Also runs | Crawl Date |
|---|---|---|
| fundacionartnexus.org | September 26, 2026 | |
| dharmaramlibrary.in | September 24, 2026 | |
| ustrcr.cz | August 19, 2026 | |
| cm-mourao.pt | August 19, 2026 | |
| goodsrv.de | August 19, 2026 | |
| biblio.cz | August 19, 2026 | |
| cm-montemornovo.pt | August 19, 2026 | |
| knihovnabreclav.cz | August 19, 2026 | |
| mk-roudnice.cz | August 19, 2026 | |
| knihovna-zbraslav.cz | August 18, 2026 |
How many websites use Koha 21.x?
We found Koha 21.x on 59 websites in our September 2026 crawl, across 24 countries.
Which countries use Koha 21.x the most?
By number of websites, the top countries are Czech Republic (31%, 18 sites), India (10%, 6 sites), Portugal (8%, 5 sites), Argentina (3%, 2 sites) and Bangladesh (3%, 2 sites). Together they account for 56% of the 59 Koha 21.x sites we track. 56% of the sites are in English, and .cz is the most used domain ending, on 29% of them.
Where are Koha 21.x websites hosted?
The networks carrying the most Koha 21.x sites are WEDOS Internet, a.s. (14 sites), Servicos De Comunicacoes E Multimedia S.A. (3 sites) and Akamai Connected Cloud (2 sites).
What technologies are used with Koha 21.x?
Across the 59 Koha 21.x sites we track, the technologies most often found alongside it are Bootstrap (100%, 59 sites), Modernizr (100%, 59 sites), Perl (100%, 59 sites), jQuery (100%, 59 sites) and jQuery UI (100%, 59 sites).
Breakdown of Koha 21.x websites
What else they run, plus their language, hosting network, domain extension and country.
| Technology | Sites |
|---|---|
Bootstrap | 59 |
Modernizr | 59 |
Perl | 59 |
jQuery | 59 |
jQuery UI | 59 |
Apache HTTP Server | 53 |
Debian | 41 |
PHP | 20 |
DataTables | 16 |
MySQL | 14 |
WordPress | 14 |
Ubuntu | 13 |
|
jQuery Migrate | 12 |
Google Analytics | 11 |
Nginx | 11 |
| HSTS | 9 |
Cloudflare | 7 |
Magnific Popup | 7 |
Lightbox | 6 |
Popper | 6 |
Site Kit | 6 |
YouTube | 6 |
cdnjs | 6 |
WP Rocket | 5 |
ZURB Foundation | 5 |
| Language | Sites |
|---|---|
| English | 33 |
| Spanish | 6 |
| Portuguese | 5 |
| Mฤori | 4 |
| Czech | 3 |
| Latin | 3 |
| French | 2 |
| Indonesian | 1 |
| Italian | 1 |
| Ukrainian | 1 |
| ASN | Sites |
|---|---|
| WEDOS Internet, a.s. | 14 |
| Servicos De Comunicacoes E Multimedia S.A. | 3 |
| Akamai Connected Cloud | 2 |
| Amazon.com, Inc. | 2 |
| Google LLC | 2 |
| Hetzner Online GmbH | 2 |
| SAREnet, S.A. | 2 |
| Arpinet LLC | 1 |
| BDCOM Online Limited | 1 |
| Blue Networks Technologies SARL | 1 |
| CANTV Servicios, Venezuela | 1 |
| CESNET z.s.p.o. | 1 |
| CLOUDFLARENET | 1 |
| Contabo Asia Private Limited | 1 |
| Contabo GmbH | 1 |
| Converge ICT Solutions Inc. | 1 |
| Dattatec.com | 1 |
| GCS Private Limited | 1 |
| Government Technology Agency | 1 |
| IFX Corporation | 1 |
| INFYNIX DATA SERVICES PRIVATE LIMITED | 1 |
| IONOS SE | 1 |
| Information and Communication Technology Agency of Sri Lanka | 1 |
| Kenya Education Network | 1 |
| Laboratory of Information Technologies LLC | 1 |
| TLD | Sites |
|---|---|
| cz | 17 |
| pt | 5 |
| org | 4 |
| in | 3 |
| ar | 2 |
| com | 2 |
| fr | 2 |
| mx | 2 |
| ua | 2 |
| 101 | 1 |
| 118 | 1 |
| 193 | 1 |
| 200 | 1 |
| 43 | 1 |
| 50 | 1 |
| ae | 1 |
| bt | 1 |
| cloud | 1 |
| de | 1 |
| edu | 1 |
| gh | 1 |
| id | 1 |
| ke | 1 |
| lk | 1 |
| ph | 1 |
| Country | Sites |
|---|---|
| ๐จ๐ฟ Czech Republic | 18 |
| ๐ฎ๐ณ India | 6 |
| ๐ต๐น Portugal | 5 |
| ๐ฆ๐ท Argentina | 2 |
| ๐ง๐ฉ Bangladesh | 2 |
| ๐ฉ๐ช Germany | 2 |
| ๐ช๐ธ Spain | 2 |
| ๐ซ๐ท France | 2 |
| ๐ฒ๐ฝ Mexico | 2 |
| ๐บ๐ฆ Ukraine | 2 |
| ๐บ๐ธ United States | 2 |
| ๐ฆ๐ช United Arab Emirates | 1 |
| ๐ฆ๐ฒ Armenia | 1 |
| ๐ง๐น Bhutan | 1 |
| ๐จ๐ด Colombia | 1 |
| ๐ฌ๐ง United Kingdom | 1 |
| ๐ฌ๐ญ Ghana | 1 |
| ๐ฎ๐ฉ Indonesia | 1 |
| ๐ฐ๐ช Kenya | 1 |
| ๐ฑ๐ฐ Sri Lanka | 1 |
| ๐ต๐ญ Philippines | 1 |
| ๐ต๐ฐ Pakistan | 1 |
| ๐ธ๐ฐ Slovakia | 1 |
| ๐ป๐ช Venezuela | 1 |
| Unknown | 1 |
FAQ
Answers drawn from our latest crawl of Koha 21.x websites. Anything else, email us and we will look it up.
Through our own crawl, which checks each site's HTML, scripts and headers rather than relying on self-reported data.