Brazilian Massa is retiring, and he admitted that his next move will probably be into Formula E.
"I think it's the most interesting place to compete and win again. It's the future of the cars we will be driving," he told Spanish newspaper AS.
Massa also wishes Formula 1, Williams and his current teammate Lance Stroll well, saying that F1 "has a good future" in the hands of Liberty Media.
"To win a championship again, Williams needs more money, but I think if they can improve many things they can be on the podium," Massa said, referring to the British team.
"[Stroll] is a lot better now compared to when the year started, but I think we can say more about his future in the second or third year."
Massa says that the best teammate he has shared a team with was Alonso.
"I would say [Michael] Schumacher was at a similar level, the same as Lewis [Hamilton]," he added.
"After that Vettel is a great driver but at a lower level and also maybe [Max] Verstappen, although he lacks consistency."
As for how Alonso will do with Renault power at McLaren next year, Massa answered: "Next year will be better for him but he will not fight for the title."
The current season comes to a close this weekend.