// cms

Websites that use Congressus in 2026

We track 270 websites running Congressus across 33 industries and 2 countries. Browse a sample of 100 matched company profiles below, each with industry, location, and verified contact data.

industries: 33
countries: 2
websites tracked: 270

Domain, industry and country per company

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Companies using Congressus

Showing 25 of 100

Website	Company	Industry	HQ
virgiel.nl	K.S.V. Sanctus Virgiliusvirgiel.nl	Non-profit Organizations	NL
fsvu.nl	FSVU - Fiscale Studievereniging Vrije Universiteitfsvu.nl	Law Practice	NL
donitas.nl	G.S.V.V. Donitasdonitas.nl	Sports Teams and Clubs	NL
vindicat.nl	G.S.C. Vindicat atque Politvindicat.nl	Civic and Social Organizations	NL
svdimensie.nl	Study Association Dimensiesvdimensie.nl	Higher Education	NL
bilboard.nl	Study Association B.I.L.bilboard.nl	Public Policy	NL
svhomerus.nl	S.V. Homerussvhomerus.nl	Higher Education	NL
sv-vedi.nl	Studievereniging Vedisv-vedi.nl	Wellness and Fitness Services	NL
lucid.cc	Study Association Industrial Design Lucidlucid.cc	Public Policy	NL
tbvlugus.nl	TBV Lugustbvlugus.nl	Mechanical or Industrial Engineering	NL
unitas-amsterdam.nl	Unitas S.A.unitas-amsterdam.nl	Consumer Goods	NL
usc.nl	Utrechtsch Studenten Corpsusc.nl	Recreational Facilities	NL
bekader.nl	Bekader, alumnivereniging (Techn.) Bedrijfskundig Ingenieursbekader.nl	Higher Education	NL
msf.org	Médecins Sans Frontièresmsf.org	Non-profit Organizations	CH
utwente.nl	University of Twenteutwente.nl	Research Services	NL
veritas.nl	Collegium Studiosorum Veritasveritas.nl	Non-profit Organizations	NL
congressus.nl	Congressuscongressus.nl	Information Technology and Services	NL
ssr-w.nl	ssr-w.nlssr-w.nl	Education Management	NL
svtotus.nl	S.V. Totussvtotus.nl	Public Relations and Communications Services	NL
nsutrecht.nl	nsutrecht.nlnsutrecht.nl	Non-profit Organizations	NL
histos.nl	u.s.histoshistos.nl	Sports Teams and Clubs	NL
nvvp.org	nvvpnvvp.org	Hospitals and Health Care	NL
amphitryon.nl	studentenvereniging amphitryonamphitryon.nl	Hospitality	NL
islink.nl	studievereniging linkislink.nl	Non-profit Organizations	NL
villa96.nl	Villa '96villa96.nl	Real Estate	NL

Refine to your ICP

Narrow these 100 companies down to the ones that match your ideal customer profile.

Revenue range Headcount Tech stack Funding stage Hiring signals Buyer intent Job title Location Founded year

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Industry breakdown

16 (16%)

Non-profit Organizations

11 (11%)

Higher Education

6 (6%)

Hospitals and Health Care

5 (5%)

Legal Services

5 (5%)

Recreational Facilities

How many websites use Congressus?

We track 270 websites that use Congressus in 2026. Those sites span 33 industries and 2 countries. The crawler re-checks each domain daily. So the count moves as sites adopt Congressus or drop it.

Congressus belongs to the CMS category. Sites in that category tend to share a similar stack. As a result, they often share buying patterns too.

The table above shows a sample of 100 matched companies. Each row carries an industry, a country, and a live domain. You can search it, sort it, and export it.

Which industries use Congressus most?

Adoption is not spread evenly. Instead, a few industries account for most of the matched sample:

Non-profit Organizations16%
Higher Education11%
Hospitals and Health Care6%
Legal Services5%
Recreational Facilities5%

Non-profit Organizations leads that list. However, the long tail matters just as much. Adoption reaches 33 industries in total. So you can narrow the list to the segment you sell into.

Where are websites that use Congressus based?

The matched companies sit in 2 countries. These lead the sample:

Netherlands 99
Switzerland 1

Netherlands is the largest single market in this sample. Because the country is stored per row, you can filter before you export. That keeps your outreach inside one timezone and one legal regime.

How to find websites that use Congressus

Start with the table above. Then follow these four steps to turn it into an outreach list:

Filter the sample. Narrow by industry or country until the rows match your ideal customer profile.
Export the domains. Share the page to unlock the CSV, or sign in for the full dataset.
Find the people. Run each domain through Domain Search to pull every work email behind it.
Verify before you send. Pass the results through the Email Verifier so your bounce rate stays low.

Working at volume? Push the whole export through Bulk Tasks instead, or call the Domain Search API directly from your own stack.

Frequently asked questions

How many websites use Congressus?

We track 270 websites that use Congressus. The index refreshes daily, so the number shifts as sites adopt or drop it. Of those, 100 are matched to a company profile with industry, location, and contact data.

Can I download the list of websites that use Congressus?

Yes. Share the page on LinkedIn to unlock a CSV export of the matched sample, with no signup required. For the full dataset and verified email addresses, create a free Tomba account.

Which industries use Congressus the most?

Non-profit Organizations leads the matched sample, at 16% of companies. In total, websites that use Congressus span 33 industries.

How fresh is the Congressus data?

Our crawler re-checks technology signals daily. So a site that removes Congressus drops out of the index, and a new adopter appears without you refreshing anything.

Can I get email addresses for websites that use Congressus?

Yes. Every domain in the table can be enriched with verified work emails and direct phone numbers. Run a single domain through Domain Search, or push the whole export through Bulk Tasks.

// get this list by api

Companies using Congressus, one request away

Filter the company search by technology, then find and verify the people at each company. The technology filter is available on paid plans; 50 companies per page.

01POST/reveal/searchCompanies that match a plain-language query or filters1 search credit 02GET/domain-searchThe email addresses at a company, with names, roles and the company profile1 search credit per 10 results 03GET/email-verifierWhether an address is deliverable: syntax, MX, SMTP, catch-all and greylisting checks1 verification credit

POST /reveal/search

curl -X POST "https://api.tomba.io/v1/reveal/search" \
  -H "X-Tomba-Key: $TOMBA_API_KEY" \
  -H "X-Tomba-Secret: $TOMBA_SECRET_KEY" \
  -H "Content-Type: application/json" \
  -d '{"filters":{"technologies":{"include":["Congressus"]}},"page":1}'

const res = await fetch("https://api.tomba.io/v1/reveal/search", {
  method: "POST",
  headers: {
    "X-Tomba-Key": process.env.TOMBA_API_KEY,
    "X-Tomba-Secret": process.env.TOMBA_SECRET_KEY,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({"filters":{"technologies":{"include":["Congressus"]}},"page":1})
});
const { data } = await res.json(); // data.companies

import os, requests

res = requests.post(
    "https://api.tomba.io/v1/reveal/search",
    headers={
        "X-Tomba-Key": os.environ["TOMBA_API_KEY"],
        "X-Tomba-Secret": os.environ["TOMBA_SECRET_KEY"],
    },
    json={"filters":{"technologies":{"include":["Congressus"]}},"page":1},
)
companies = res.json()["data"]["companies"]

// technologies

Other technologies to explore

Websites that use Congressus in 2026

Download the 100 Congressus customers

Companies using Congressus

Refine to your ICP

Industry breakdown

How many websites use Congressus?

Which industries use Congressus most?

Where are websites that use Congressus based?

How to find websites that use Congressus

Frequently asked questions

Companies using Congressus, one request away

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