Download websites that use Congressus
129 live sites using Congressus right now
CMS · by Congressus · Proprietary
129 sites
Dataset updated · 2026-10-03
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CMS
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All figures here come from one snapshot of the webatla database, taken on this date (UTC). We usually refresh it every day.
129
Sites detected
0.0%
Of all websites
Preview Congressus site datasets
Congressus detection is a value inside the Technologies column. Two datasets carry it, switch between them to compare what's included.
webatla-technologies-congressus-2026-10-03.jsonl.zst · 129 rows · 14 columns
Daily fresh export
| Domain | TLD suffix | TLD | Domain type | HTTP status | IP address | Country by IP | Social networks | Technologies last data checked | Technologies | PR value | Harmonic value | Domain creation date | Domain expiration date |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| vspn.nl | nl | nl | ICANN | HTTP 200 | 185.104.29.98 | NL | {"facebook":["https://facebook.com/SportPsychNL"],"linkedin":["https://linkedin.com/company/vereniging-voor-sportpsychologie-in-nederland-vspn?viewAsMember=true"],"instagram":["https://instagram.com/sportpsychnl"],"x-twitter":["https://twitter.com/sportpsychnl"]} | 2026-09-22 | HSTS, cdnjs, HTTP/2, jQuery 1.11.3, Favicon, Bootstrap 3.0.3, Amazon SES, Cloudflare, Congressus, Open Graph | 0.0000000204722 | 12,212,269 | 2002-05-15 | — |
| ber-voetreflexologie.nl | nl | nl | ICANN | HTTP 200 | 86.105.244.1 | NL | {"facebook":["https://facebook.com/pages/Bond-van-Europese-Reflexologen/100992192777483"]} | 2026-09-28 | HSTS, cdnjs, HTTP/2, jQuery 1.11.3, Favicon, Bootstrap 3.0.3, Amazon SES, Cloudflare, Congressus, Open Graph | 0.0000000136735 | 10,182,359 | 2013-04-30 | — |
| bovib.nl | nl | nl | ICANN | HTTP 200 | 85.10.159.55 | NL | {"linkedin":["https://linkedin.com/company/bovib"],"x-twitter":["https://twitter.com/bovibnl"]} | 2026-09-29 | HSTS, cdnjs, HTTP/2, jQuery 1.11.3, Favicon, Bootstrap 3.0.3, Amazon SES, Cloudflare, Congressus, Open Graph | 0.0000000123149 | 11,769,647 | 2014-09-03 | — |
| voks.nl | nl | nl | ICANN | HTTP 200 | 185.37.124.35 | NL | {"facebook":["https://facebook.com/groups/verenigingvoks"]} | 2026-09-22 | HSTS, cdnjs, HTTP/2, jQuery 1.11.3, Favicon, Bootstrap 3.0.3, Modernizr, Amazon SES, Cloudflare, Congressus | 0.00000000944782 | 12,001,262 | 1999-08-12 | — |
| bouwspecificatiedeskundigen.nl | nl | nl | ICANN | HTTP 200 | 185.24.240.161 | NL | {"linkedin":["https://linkedin.com/company/bnb-beroepsvereniging-nederlandse-bouwspecificatiedeskundigen?viewAsMember=true"]} | 2026-09-29 | HSTS, cdnjs, HTTP/2, jQuery 1.11.3, Favicon, YouTube, Bootstrap 3.0.3, Amazon SES, Cloudflare, Congressus | 0.00000000872931 | 9,224,904 | 2019-05-06 | — |
| … | … | … | … | … | … | … | … | … | … | … | … | … | … |
| Domain | TLD suffix | TLD | Domain type | HTTP status | IP address | Country by IP | Social networks | Technologies last data checked | Technologies | DNS last data checked | DNS Status | DNS records | PR value | Harmonic value | RDAP/WHOIS last data checked | RDAP/WHOIS method | Domain creation date | Domain expiration date | Domain last changed | Registrar | RDAP/WHOIS Record | Response Status RDAP/WHOIS |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| vspn.nl | nl | nl | ICANN | HTTP 200 | 185.104.29.98 | NL | {"facebook":["https://facebook.com/SportPsychNL"],"linkedin":["https://linkedin.com/company/vereniging-voor-sportpsychologie-in-nederland-vspn?viewAsMember=true"],"instagram":["https://instagram.com/sportpsychnl"],"x-twitter":["https://twitter.com/sportpsychnl"]} | 2026-09-22 | HSTS, cdnjs, HTTP/2, jQuery 1.11.3, Favicon, Bootstrap 3.0.3, Amazon SES, Cloudflare, Congressus, Open Graph | 2026-09-20 | TRUE | {"A":["185.104.29.98"],"DS":[{"digest":"bf1337710ee221e9678b006b70bcf8fde114909f23cdddc4a8a3d0b34609ce58","key_tag":45755,"algorithm":13,"digest_type":2}],"MX":[{"host":"mail.vspn.nl","priority":10}],"NS":["ns.zxcs.be","ns.zxcs.eu","ns.zxcs.nl"],"SOA":{"mname":"ns.zxcs.nl","retry":3600,"rname":"hostmaster.vspn.nl","expire":1209600,"serial":2026071001,"minimum":86400,"refresh":600},"TXT":["v=spf1 a mx ip4:185.104.29.98 ip6:2a06:2ec0:1:0:0:0:0:131 include:filter-out.zxcs.nl include:amazonses.com ip4:93.186.182.15 ~all"],"DNSKEY":[{"flags":257,"protocol":3,"algorithm":13,"public_key":"5aC6jHIC/iRkvkmxoiTE0y26ZgJCef+7zG7lHY35Z0FYMG7sHYFThusB8LOw3tQvivObTe7qIQVP84VxSsEc9w=="}]} | 0.0000000204722 | 12,212,269 | 2026-09-26 | RDAP | 2002-05-15 | — | 2023-06-06 | ZXCS | {"raw_response":{"lang":"nl-NL","links":[{"rel":"self","href":"https://rdap.sidn.nl/domain/vspn.nl","type":"application/rdap+json","value":"https://rdap.sidn.nl/domain/vspn.nl"}],"events":[{"eventDate":"2002-05-15T11:06:00Z","eventAction":"registration"},{"eventDate":"2023-06-06T10:13:03Z","eventAction":"last changed"},{"eventDate":"2026-09-26T08:09:38Z","eventAction":"last update of RDAP database"}],"handle":"REDACTED-BY-SIDN","status":["active"],"ldhName":"vspn.nl","notices":[{"links":[{"rel":"glossary","href":"https://icann.org/epp","type":"text/html","value":"https://rdap.sidn.nl/domain/vspn.nl"}],"title":"Status Codes","description":["Meer informatie over domeinstatuscodes vind je op https://icann.org/epp","For more information on domain status codes, please visit https://icann.org/epp"]},{"title":"Privacy notice","description":["De houdergegevens kunnen afgeschermd zijn. Meer informatie hierover vind je op: https://www.sidn.nl/nl-domeinnaam/sidn-en-privacy","The registrant's details can be withheld from public view. For more information, see https://www.sidn.nl/en/nl-domain-name/sidn-and-privacy"]},{"title":"Maintainer","description":["Administratie door: SIDN BV","Record maintained by: SIDN BV"]},{"links":[{"rel":"help","href":"https://icann.org/wicf","type":"text/html","value":"https://rdap.sidn.nl/domain/vspn.nl"}],"title":"RDDS Inaccuracy Complaint Form","description":["URL of the ICANN RDDS Inaccuracy Complaint Form: https://www.icann.org/wicf"]}],"entities":[{"links":[{"rel":"about","href":"https://rdap.sidn.nl/entity/PET083941-DIGII","type":"application/rdap+json","value":"https://rdap.sidn.nl/entity/PET083941-DIGII"}],"roles":["administrative"],"handle":"PET083941-DIGII","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","REDACTED FOR 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policy"},"prePath":"$.entities[?(@.roles[0]=='administrative')].vcardArray[1][?(@[0]=='tel')]","pathLang":"jsonpath"},{"name":{"description":"Registrar handle"},"method":"replacementValue","reason":{"description":"Server policy"},"pathLang":"jsonpath","postPath":"$.entities[?(@.roles[0]=='registrar')].handle"},{"name":{"description":"Public id"},"method":"replacementValue","reason":{"description":"Server policy"},"pathLang":"jsonpath","postPath":"$.entities[?(@.roles[0]=='registrar')].publicIds[@LAST].identifier"},{"name":{"description":"Registrar email"},"method":"removal","reason":{"description":"Server policy"},"prePath":"$.entities[?(@.roles[0]=='registrar')].vcardArray[1][?(@[0]=='email')]","pathLang":"jsonpath"},{"name":{"description":"Registrar phone number"},"method":"removal","reason":{"description":"Server policy"},"prePath":"$.entities[?(@.roles[0]=='registrar')].vcardArray[1][?(@[0]=='tel')]","pathLang":"jsonpath"},{"name":{"description":"Technical 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policy"},"prePath":"$.entities[?(@.roles[0]=='technical')].vcardArray[1][?(@[0]=='tel')]","pathLang":"jsonpath"}],"secureDNS":{"dsData":[{"digest":"BF1337710EE221E9678B006B70BCF8FDE114909F23CDDDC4A8A3D0B34609CE58","keyTag":45755,"algorithm":13,"digestType":2}],"delegationSigned":true},"nameservers":[{"links":[{"rel":"about","href":"https://rdap.sidn.nl/nameserver/ns.zxcs.eu","type":"application/rdap+json","value":"https://rdap.sidn.nl/nameserver/ns.zxcs.eu"}],"ldhName":"ns.zxcs.eu","unicodeName":"ns.zxcs.eu","objectClassName":"nameserver"},{"links":[{"rel":"about","href":"https://rdap.sidn.nl/nameserver/ns.zxcs.be","type":"application/rdap+json","value":"https://rdap.sidn.nl/nameserver/ns.zxcs.be"}],"ldhName":"ns.zxcs.be","unicodeName":"ns.zxcs.be","objectClassName":"nameserver"},{"links":[{"rel":"about","href":"https://rdap.sidn.nl/nameserver/ns.zxcs.nl","type":"application/rdap+json","value":"https://rdap.sidn.nl/nameserver/ns.zxcs.nl"}],"ldhName":"ns.zxcs.nl","unicodeName":"ns.zxcs.nl","objectClassName":"nameserver"}],"objectClassName":"domain","rdapConformance":["rdap_level_0","icann_rdap_response_profile_1","icann_rdap_technical_implementation_guide_1","redacted"]}} | Domain is active |
| ber-voetreflexologie.nl | nl | nl | ICANN | HTTP 200 | 86.105.244.1 | NL | {"facebook":["https://facebook.com/pages/Bond-van-Europese-Reflexologen/100992192777483"]} | 2026-09-28 | HSTS, cdnjs, HTTP/2, jQuery 1.11.3, Favicon, Bootstrap 3.0.3, Amazon SES, Cloudflare, Congressus, Open Graph | 2026-09-27 | TRUE | {"A":["86.105.244.1"],"DS":[{"digest":"757f1aa60fc696290fbdd6b1121b9a863311405da4b72c34a8fe7f2226519655","key_tag":4448,"algorithm":13,"digest_type":2}],"MX":[{"host":"ALT1.ASPMX.L.GOOGLE.COM","priority":5},{"host":"ALT2.ASPMX.L.GOOGLE.COM","priority":5},{"host":"ALT3.ASPMX.L.GOOGLE.COM","priority":10},{"host":"ASPMX.L.GOOGLE.COM","priority":1}],"NS":["ns0.nl","ns11.net","ns5.be"],"SOA":{"mname":"ns0.nl","retry":1800,"rname":"hostmaster.ns0.nl","expire":2419200,"serial":2026090503,"minimum":300,"refresh":86400},"TXT":["google-site-verification=TtCVHhtleJBIyebTDuEXy4N74pYkXmIGlyaDRvOsCWA","v=spf1 include:_spf.transip.email include:amazonses.com include:_spf.google.com ~all"],"AAAA":["2a01:7c8:e100:1::50a0"],"DNSKEY":[{"flags":256,"protocol":3,"algorithm":13,"public_key":"1cWL1PAhTkjX0VT2L/z+LNayIZF/2rwbWMaaG/9lH5fRfSuun3qcbihq2gTUx5fQjqlh6H98k45DyucBx8yoCQ=="},{"flags":257,"protocol":3,"algorithm":13,"public_key":"X7a3OtGWLyvtoIrx0hTdVzcyaZUnFPl+4/OzpurrbwCVxIr+RXe8gpHoyT+OaedtMGAFBF/QyPvELTGFwDsS4g=="}]} | 0.0000000136735 | 10,182,359 | 2026-09-16 | RDAP | 2013-04-30 | — | 2021-11-27 | Internationale Domeinregistratie Nederland | {"raw_response":{"lang":"nl-NL","links":[{"rel":"self","href":"https://rdap.sidn.nl/domain/ber-voetreflexologie.nl","type":"application/rdap+json","value":"https://rdap.sidn.nl/domain/ber-voetreflexologie.nl"}],"events":[{"eventDate":"2013-04-30T14:31:12Z","eventAction":"registration"},{"eventDate":"2021-11-27T16:15:08Z","eventAction":"last changed"},{"eventDate":"2026-09-16T15:21:58Z","eventAction":"last update of RDAP database"}],"handle":"REDACTED-BY-SIDN","status":["active"],"ldhName":"ber-voetreflexologie.nl","notices":[{"links":[{"rel":"glossary","href":"https://icann.org/epp","type":"text/html","value":"https://rdap.sidn.nl/domain/ber-voetreflexologie.nl"}],"title":"Status Codes","description":["Meer informatie over domeinstatuscodes vind je op https://icann.org/epp","For more information on domain status codes, please visit https://icann.org/epp"]},{"title":"Privacy notice","description":["De houdergegevens kunnen afgeschermd zijn. 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PRIVACY"]]],"objectClassName":"entity"},{"links":[{"rel":"about","href":"https://rdap.sidn.nl/entity/CON044809-INTER","type":"application/rdap+json","value":"https://rdap.sidn.nl/entity/CON044809-INTER"}],"roles":["administrative"],"handle":"CON044809-INTER","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","REDACTED FOR PRIVACY"]]],"objectClassName":"entity"},{"links":[{"rel":"about","href":"https://rdap.sidn.nl/entity/BON024038-INTER","type":"application/rdap+json","value":"https://rdap.sidn.nl/entity/BON024038-INTER"}],"roles":["registrant"],"handle":"BON024038-INTER","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","REDACTED FOR PRIVACY"]]],"objectClassName":"entity"},{"roles":["registrar"],"handle":"0000","entities":[{"roles":["abuse"],"handle":"ABUSE-SIDN","vcardArray":["vcard",[["version",{},"text","4.0"],["fn",{},"text","abuse@www.ns0.nl"],["email",{},"text","abuse@www.ns0.nl"]]],"objectClassName":"entity"}],"publicIds":[{"type":"IANA 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| Domain is active |
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Showing 5 of 129 rows · Technologies · Full website tech stack per site: CMS, payments, analytics, frameworks.
The Congressus dataset
Every site we've detected as running Congressus, with version, hosting, country, TLD and traffic rank.
Congressus lives inside 2 datasets
Congressus detection is part of Technologies (€159/mo) and All data (€599/mo). Buy either to filter the full 129-site list, or grab a free preview first.
About Congressus
Membership organizations are a market that most software footprints miss entirely. Clubs, student associations, professional bodies, unions and volunteer groups run genuine subscription businesses, with renewals, tiered dues, rosters and events, yet almost none of them appear in a commerce dataset because nothing is being sold from a catalogue. Congressus is the kind of platform built to serve them.
As of October 2026 we detect it on 129 sites, filed under CMS because member management is customer relationship management with a different vocabulary. The product is Proprietary and hosted, and Congressus publishes it from a .nl domain, which is the only geographic fact in this record we can genuinely stand behind. Whether the installed base is as concentrated in the Low Countries as a vendor domain suggests is a question the raw list settles and a description cannot.
A match carries a specific implication about the site behind it. A domain loading a membership platform has a defined roster of paying members behind a login, an annual renewal cycle and, usually, a small volunteer or part time administration that chose hosted software precisely to avoid maintaining anything. Purchasing behaviour follows from that shape: decisions get made by a board rather than a procurement department, budgets are modest but stable, switching is rare, and when it happens it happens for the whole organization at once.
Insurers, event ticketing services, payment providers and competing membership platforms all want this list for the same reason, which is that the audience is scattered across many small domains and reachable through no industry directory. The caveats are simple enough to state. We publish no version data for Congressus, because the hosted product exposes none, and no country breakdown, because the count is too small for a geographic split to be worth presenting as fact. A member portal living behind a login or on a subdomain may also never surface on a page we crawl, so the figure is a floor rather than a full customer count.
Frequently asked questions
How many websites use Congressus?
webatla detects Congressus on 129 websites, refreshed daily, each with its domain, DNS, WHOIS, IP, country and ranking.
Can I download the list of websites using Congressus?
Yes, as structured JSONL. Grab a free sample first.
What's included for each site, and how fresh is it?
Domain, DNS, RDAP/WHOIS, the full technology stack, IP & country, PageRank and Harmonic, re-detected and re-exported daily.
How do I find the websites using Congressus?
Buy the technology dataset, then download the complete list of domains we detect using Congressus, re-exported every day.
What else is in the Congressus technology data?
Each row places Congressus next to the other technology on the same site, plus DNS, WHOIS, IP, country and ranking.
Can I download just the sites using Congressus, or the whole database?
Both. Every site running Congressus comes in the Technologies dataset, one downloadable file. Or buy All data for the entire database: technologies plus identity, ranking, DNS and RDAP/WHOIS for every domain, combined in one file. Daily fresh export.
How do I download the list of websites using Congressus?
Three steps: (1) grab the free 10,000-row sample to inspect the schema, (2) buy the Technologies dataset, (3) download the full list of every domain we detect running Congressus as a JSON Lines file. It is re-exported daily, so you can re-download the freshest list any time inside your access window. Each row carries the domain plus DNS, WHOIS, IP, hosting country and rank.
Get the full list of websites using Congressus
Pick the dataset that covers what you need. Each one includes Congressus and downloads as JSONL, rebuilt daily.
Technologies
14 columns
Full website tech stack per site: CMS, payments, analytics, frameworks.
€159 / mo
Buy and download
Download preview dataset
All data
23 columns
Everything we have, in a single package. The full webatla universe.
€599 / mo
Buy and download
Download preview dataset
Want to compare every dataset side by side? Visit the pricing page
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