T
- Tablet Hotels
- Tabu Chat
- TAP Portugal
- Tarot
- Tecnosport
- Tele2
- Telepass
- TeleTu
- teleunit
- Terminal A
- Terminal A IT
- Terravision
- TGO
- TGV-Europe
- The Gigastore
- TheClub
- TheKult
- Ticket Accor Services
- Tifoshop
- Tim
- TIM CAFE
- Tiscali
- tiscali business services
- Todomondo
- TomTom
- Top Viaggi
- Topman
- TradeDoubler
- Traghettilines
- Transavia
- TransCash
- Travel Experience
- Travelmix
- Trawelfly
- Trend Micro
- TripCruises
- Trovolavoro
- Trudi Sevi Olli
- TUI
- TUIfly
- TuneUp