idealo is a German price comparison portal that lists offers from online merchants so consumers can compare prices and follow links to the shops. It was launched in Berlin in 2000 and is operated by idealo internet GmbH, headquartered in Berlin-Mitte. Merchants are charged per referred visit or a share of the sales generated through the portal. A checkout that let users order products directly on idealo was discontinued at the end of 2022.
Axel Springer SE acquired a majority stake in idealo internet GmbH in 2006 and is listed as its parent company. idealo is a German company, so EU data protection law applies to its processing of personal data of European users. The service is a consumer-facing website rather than self-hosted software, so no open-source or on-premise option applies. Organisations that share data with the portal or advertise on it should read its privacy terms before doing so.