KVK company data

Dutch company data, with the contact details included

3.6 million active companies from the KVK registry, enriched with email, phone, website and contact person. Search for free in the portal or fetch the same data through the REST API.

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Search is free. You only pay for contact details you reveal.

Example KVK34512879

Bakkerij Voorbeeld B.V.

Utrecht · SBI 1071 · 2-10 employees

Email: •••••@voorbeeld.nl; Available
Phone: +31 30 •••• •••; Available
Website: voorbeeld.nl; Available
Contact person: Not available; Not available

1 credit to reveal, then free for your organization

What you get

The KVK registry, plus how to reach each company

active companies: 3.6M; Registered with the KVK, with address, SBI code, size, legal form and founding year.
contact fields: 4; Email, phone, website and contact person, where known.
credits to search: 0; Searching, filtering and viewing profiles is free.
pay per company: 1×; Once revealed, a company stays free for your whole organization.

How it works

Search for free, pay per contact

You see up front which contact fields are available. Credits are only used when you reveal details.

01
Search for free

Filter by industry (SBI), province, city, postcode, size, legal form and founding year, and by availability of email, phone or contact person.
02
Pay per contact

Reveal contact details only for the companies you pick. That costs 1 credit per company. Anything your organization already revealed stays free.
03
Export or integrate

Keep companies in lead lists and saved searches, export to CSV, or fetch the same data through the REST API.

Portal and API

One dataset, two ways in

Portal

For sales and marketing teams

Search and select in the browser, nothing to install.

Search with every filter, paged results
Lead lists and saved searches
CSV export, ready for your CRM
Team accounts sharing one allowance

Request access

API

For data and engineering teams

The same data and the same billing, from your own code.

REST API with API keys per environment
Search, profile by KVK number and bulk contacts
OpenAPI 3.1 document
Test keys with sample data, never charged

Go to the API

For developers

One request, JSON back

Searching through the API costs no credits. The availability fields show what a reveal would return.

Bearer authentication with bzd_live_ and bzd_test_ keys
Cursor pagination
Every response carries a request_id

All endpoints

curl --request GET \
  --url 'https://api.bizstackdata.com/v1/companies/search?sbi=1071&province=Utrecht&has=email&limit=25' \
  --header 'Authorization: Bearer YOUR_API_KEY'

const res = await fetch('https://api.bizstackdata.com/v1/companies/search?sbi=1071&province=Utrecht&has=email&limit=25', {
  headers: { Authorization: `Bearer ${process.env.BZD_API_KEY}` },
});
const { data, meta } = await res.json();

import os, requests

res = requests.get(
    'https://api.bizstackdata.com/v1/companies/search?sbi=1071&province=Utrecht&has=email&limit=25',
    headers={'Authorization': f"Bearer {os.environ['BZD_API_KEY']}"},
)
print(res.json()['data'])

{
  "data": [
    {
      "registration_number": "34512879",
      "legal_name": "Bakkerij Voorbeeld B.V.",
      "employees": "2-10",
      "address": { "city": "Utrecht", "province": "Utrecht" },
      "availability": { "email": true, "phone": false, "website": true, "contact_person": false }
    }
  ],
  "meta": { "count": 1, "total": 34, "credits_charged": 0 }
}

Hosted in the EU

The application and database run on servers in the European Union.
Source: KVK registry

Base data comes from the Dutch Business Register, enriched by data partners.
GDPR

A data processing agreement is available. You only see contact details your organization revealed.
No tracking

This website sets no analytics or tracking cookies.

Start searching

Request access. We get back to you within 1 business day to set up your account and allowance.

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