The tramway is operated by the Société d'économie mixte des transports publics de l'agglomération grenobloise (SÉMITAG) on behalf of the Communauté d'agglomération Grenoble Alpes Métropole, the intercommunal structure linking the commune of Grenoble and its suburbs.

At this point there were three main operators: the Société grenobloise de tramways électriques [fr], which operated the urban lines; the Voies ferrées du Dauphiné [fr], which served from Grenoble, the Left Bank of the Isère up to Froges as well as the valley of l'Oisans; and the tramway Grenoble - Chapareillan [fr], which linked the center of Grenoble to Chapareillan and serves the whole Right Bank in the valley of Grésivaudan.

With the rise of the bus, the trolleybus and the private car, ridership and profits declined and the tramways were replaced by buses.

The current network comprises 93 stations, 12 of which are shared by two lines: The Grenoble tramway is served by a total of 103 trams.

They were introduced in successive steps as follows: The Alstom Citadis fleet is composed of 50 trams numbered from 6001 to 6050, and circulates on the A, B and C lines.