Trade of steam, hot water and cooled air companies in Konstanz

Konstanz ·Currently listed companies in the Trade of steam, hot water and cooled air industry headquartered in Konstanz.

17 companies

4contrade GmbH HRB 708789 Freiburg (Freiburg im Breisgau) · 2012
c5a30e3aff…
Bernhard Trüb GmbH HRB 381549 Freiburg (Freiburg im Breisgau) · 1998
38b8646611…
Climate Proof UG (haftungsbeschränkt) HRB 728397 Freiburg (Freiburg im Breisgau) · 2023
61aca5ec53…
cool down UG (haftungsbeschränkt) HRB 733006 Freiburg (Freiburg im Breisgau) · 2025
53b4ee3493…
Der Kaminofen GmbH HRB 705060 Freiburg (Freiburg im Breisgau) · 2010
bfb46b2dd2…
Diehl & Team Isolierungen GmbH HRB 703950 Freiburg (Freiburg im Breisgau) · 2009
f871a0d523…
DIETENMEIER + HARSCH Haustechnik Service GmbH HRB 734058 Freiburg (Freiburg im Breisgau) · 2025
a9dc100093…
Dietenmeier und Harsch Energie- und Unternehmensberatung GmbH HRB 381751 Freiburg (Freiburg im Breisgau) · 2000
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Energy Depot EU GmbH HRB 721590 Freiburg (Freiburg im Breisgau) · 2020
6d5afa6595…
Gautschi Engineering GmbH HRB 702359 Freiburg (Freiburg im Breisgau) · 2008
4d614560a6…
GrønKomfort e.K. HRA 708539 Freiburg (Freiburg im Breisgau) · 2024
826b406c8e…
H & F - Kundendienst und Service GmbH HRB 381898 Freiburg (Freiburg im Breisgau) · 2002
e891dc5b06…
Hexis GmbH HRB 701155 Freiburg (Freiburg im Breisgau) · 2007
5e6b0fab95…
Hydro-X GmbH HRB 714752 Freiburg (Freiburg im Breisgau) · 2016
c0f6d36165…
Stadtwerke Konstanz GmbH HRB 381756 Freiburg (Freiburg im Breisgau) · 2000
5fb937028c…
Wasserkraft Musikinsel Zahn/Jorde GmbH HRB 718583 Freiburg (Freiburg im Breisgau) · 2018
ad067e6fda…
Wunderpixel GmbH HRB 719270 Freiburg (Freiburg im Breisgau) · 2014
aec6950524…

All industries in Konstanz

Live API

GEThandelsregister.ai/api/v1/search-organizations

?limit=20

&filters={"city":"Konstanz","industry_code":"35.30.3","industry_scheme":"WZ2025"}

# pip install handelsregister
from handelsregister import Handelsregister

client = Handelsregister(api_key="YOUR_API_KEY")  # or set HANDELSREGISTER_API_KEY
page = client.search_organizations(
    filters={
        "city": "Konstanz",
        "industry_code": "35.30.3",
        "industry_scheme": "WZ2025"
    },
    limit=20,
    skip=0,
)
print(page["total"])
for item in page["results"]:
    print(item["name"], item["registration"]["register_number"])

// npm install handelsregister
import { Handelsregister } from 'handelsregister';

const client = new Handelsregister('YOUR_API_KEY'); // or set HANDELSREGISTER_API_KEY
const page = await client.searchOrganizations({
  filters: {
      "city": "Konstanz",
      "industry_code": "35.30.3",
      "industry_scheme": "WZ2025"
  },
  limit: 20,
  skip: 0,
});
console.log(page.total);
for (const item of page.results) {
  console.log(item.name, item.registration.register_number);
}

// npm install handelsregister
const { Handelsregister } = require('handelsregister');

const client = new Handelsregister(process.env.HANDELSREGISTER_API_KEY);
(async () => {
  const page = await client.searchOrganizations({
    filters: {
        "city": "Konstanz",
        "industry_code": "35.30.3",
        "industry_scheme": "WZ2025"
    },
    limit: 20,
    skip: 0,
  });
  console.log(page.total);
  for (const item of page.results) {
    console.log(item.name, item.registration.register_number);
  }
})();

curl 'https://handelsregister.ai/api/v1/search-organizations?limit=20' \
  -H 'x-api-key: YOUR_API_KEY' \
  -G --data-urlencode 'filters={"city":"Konstanz","industry_code":"35.30.3","industry_scheme":"WZ2025"}'

{
    "results": [
        {
            "entity_id": "<32-char hex>",
            "name": "<string>",
            "registration": {
                "court": "<string>",
                "register_type": "<string>",
                "register_number": "<string>"
            },
            "address": {
                "house_number": "<string>",
                "street": "<string>",
                "postal_code": "<string>",
                "city": "<string>",
                "county": "<string>",
                "state": "<string>",
                "country": "<ISO country>",
                "coordinates": {
                    "latitude": "<float>",
                    "longitude": "<float>"
                }
            },
            "registration_date": "<ISO date>",
            "purpose": "<string>"
        }
    ],
    "total": "<int>",
    "meta": {
        "request_credit_cost": "<int>",
        "credits_remaining": "<int>"
    }
}

results[]

entity_id string

Stable 32-char hex identifier. Pass straight into /fetch-organization as `q`.

name string

Registered company name.

registration object

address object

Postal address with street, house_number, postal_code, city, county, state, country and coordinates (latitude/longitude).

registration_date date

Initial entry into the commercial register (ISO date).

purpose string

Stated business purpose (Unternehmensgegenstand).

top-level

total integer

Total result count for pagination.

meta.request_credit_cost integer

Credits actually charged for this call.

meta.credits_remaining integer

Account credit balance remaining after this call.

Location · Industry · Legal form · Full-text

Filters & master data — via search-organizations

City, industry, legal form, registration date: every argument combinable through the filters parameter. One REST endpoint, every German company.

Location & geo Filter by city, postal code, state and county through city, postal_code, state and county.
Industry (WZ2025) Industry segmentation via the official WZ2025 codes — industry_code combined with industry_scheme.
Legal form GmbH, AG, KG, OHG and more via legal_form_code.
Company size bs_company_size_category – small, medium, large based on balance-sheet totals.
Active status Restrict to active entries or include deleted companies via active.
Registration date Date ranges via registration_date_from and registration_date_to.
Full-text search Free-text query via the q parameter (min. 2 characters).
Pagination skip and limit (up to 30 results per call) for deep lists.
Master data per result entity_id, name, address, registration and registration_date – pass entity_id straight to /fetch-organization.

Run every filter live with an API key. Get an API key →

Code · AI-Agents · No-Code · Workflows

Drops into any stack

The search-organizations API speaks every mainstream client: REST, Python, Node, MCP for AI agents, n8n and webhook platforms.

REST API Simple GET request with the X-API-KEY header and JSON-encoded filters. Python requests, httpx or your favourite library — pass filters via json.dumps. Node.js fetch or axios with URLSearchParams. Works in edge, worker and browser runtimes. MCP Server Directly in Claude, Cursor or any MCP-aware AI client as the search_organizations tool. n8n Pre-built custom node for workflow automation — city, industry and size as filter inputs. Webhook Callable from Zapier, Make or any other webhook platform.

This list in your app

Grab an API key and filter every German company by city, industry, size and more — straight from your application. One REST endpoint, every result.

Get an API key

Filters & master data — via search-organizations

Drops into any stack

This list in your app

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