Galfleet

Galfleet was the exploratory and defense service of the United Federation of Planets in the 31st century. It was likely the successor to Federation Starfleet. 

History
When Federation Temporal Agency operative Jena Noi was stranded in an alternate timeline on Day 266, 3051, she found the sleek TIA transports not too different from their Galfleet counterpart, except with regards to their heavier armament.