What font does TripAdvisor use? The closest font you can get for the TripAdvisor logo is Frutiger Roman…
What font does AT&T use? The closest font you can get for the AT&T logo is Avenir Medium font.
Designers: Adrian Frutiger
Free alternative fonts for AT&T logo:
The closest free font you can get is FrancophilSans Font.
About free fonts:
Fonts by Manfred Klein