Founder and owner of b2bkontakty.pl. Author of the articles published here on company data, public registers and the rules for contacting businesses.
Who is behind b2bkontakty.pl
b2bkontakty.pl is run by Martin Adamec, a sole trader based in the Czech Republic. The content, the choice of data sources and the replies to enquiries come from a specific person who can be found in a public register – not an agency.
Czech business ID (IČO)
19552319
Legal form
sole trader entered in the Czech trade licence register
In business since
24 July 2023
Address
Mírová 1541, 516 01 Rychnov nad Kněžnou, Czech Republic
The articles on b2bkontakty.pl answer one question: how do you work with company data in practice and within the law? They explain where company data comes from, how to check it and where the legal limits of contact lie.
The principle: give figures with a date and source, say openly what is not known and never round in our own favour. Our way of working is described on the Data sources and methodology page, the current scope on the Database status page.
Free Polish company data: what CEIDG, KRS and REGON offer13 October 2026 – The largest free company databases in Poland are run by the state. What you can get from CEIDG, KRS and REGON, through which API – and what is not there.
PKD 2025: Polish industry codes for company lists13 October 2026 – Two classifications in one register: which sections changed letters, which codes changed meaning and how to filter companies until the end of 2026.
GDPR and B2B Outreach: What Applies When Contacting Czech Companies9 October 2026 – What sales and marketing teams need to know about contacting Czech companies lawfully – GDPR legitimate interest, Czech Act 480/2004 and the line between company data and personal data.
VAT Payer Reliability in Czechia: What You Must Know18 September 2026 – Buying from Czech suppliers? An invoice from an “unreliable VAT payer” can make you liable for their unpaid VAT – here is how to protect yourself.
