Consumers Software is a computer networking company based in Canada. The company originally created early spreadsheets utilities and later developed Network Courier, an email product based on the concept of one or more connected 'post offices'. The post office could be connected to legacy email systems, such as PROFS, DEC and other largely mainframe based email system using connectors.
Consumers Software was one of two companies actively selling email systems at the time. The other was cc:Mail, based in California.