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795'104 firms from the commercial register, free to search by name, UID, town or postcode. For each firm you see how many building projects it is involved in.
Firms by canton
Aargau 47'378Appenzell Innerrhoden 2'188Appenzell Ausserrhoden 5'937Bern 70'357Basel-Landschaft 20'889Basel-Stadt 19'612Fribourg 26'674Geneva 58'442Glarus 3'719Graubünden 20'453Jura 7'033Lucerne 35'725Neuchâtel 13'691Nidwalden 5'749Obwalden 4'404St. Gallen 43'909Schaffhausen 6'647Solothurn 18'942Schwyz 23'309Thurgau 24'122Ticino 44'025Uri 2'464Vaud 70'286Valais 36'247Zug 44'380Zurich 138'522
More with Business
With Business you see, for every firm, the building permit applications it filed as project author or developer, plus the directory of all architecture firms with their projects.
Source: commercial register (Zefix, federal open data via LINDAS), updated weekly. Firms without a commercial-register entry are added from the federal UID register when you search.