Germany
Jahn Ingenieur GbR is an independent planning firm specializing in building technology and supply technology, operating in private, industrial, and commercial sectors. It offers a wide range of services, including the execution of heating and sanitary systems, as well as all variants of supply technology in various industries.
Browsing, company names, locations and sectors are always free. A free account adds 5 contact releases every month — e-mail and phone, view or export. Need more? Contact packs start at 19 € for 50, or upgrade to a monthly plan.
Yes — no card required. Browsing is always free, and a free account adds 5 contact releases every month.
Your first 5 contact releases each month are included in the free account. After that, packs start at 19 € for 50 contacts (view or export), or a monthly plan for regular use.
Companies are harvested from the open web — registers, websites and industry directories — not self-registered sign-ups. Contact details are shown only once you use a release or credit, never invented.