The council said Thus will take full control of its voice infrastructure and develop a strategy to strengthen its future networking capabilities.
Stirling Council previously relied on a combination of telecoms providers, including Thus, for the provision of its network. The council said it wanted a single provider to cut the "high costs of managing multiple suppliers".
Jim McNeish, of Stirling's corporate asset management unit, said, "With only a small facilities management team responsible for many different council activities, it was important to enlist a supplier that could take on the majority of the network management responsibilities.
"A single supplier model simplifies activities such as bill payment, fault reporting and provisioning. We now have time to add further value to the council in other areas."