Felipe Massa says he is not limiting talks about his future solely to Williams as he looks to extend his stay in Formula One into a 15th season.
Williams are yet to confirm either of its drivers for next season and although the British outfit is likely to retain Valtteri Bottas for a fifth year, rumours have circled over Massa's future at the team.
Jenson Button has been linked with a return to the team he started his F1 career with in 2000, while Sergio Perez's non-committal stance over his future at Force India has seen him also emerge as a potential target for Williams.
When asked whether he has started contract negotiations with Williams, Massa revealed he has been in contact with multiple teams.
"The talks is for sure happening since a little bit of time," Massa said. "I would not say just here, in this team, but around. I think now we don't have 100 percent the right answer and at the time will be the right answer, so we see what is going to happen.
"I don't want to really say names of teams or whatever but I am interested in being able to drive in a team that I feel important, that I feel that we can have a good result, a good job, and if I don't have that, maybe I will not be here next year."
Massa -- who made his F1 debut with Sauber in 2002 -- said he is only interested in securing a drive at a team where he feels valued and admitted that if that is not a possibility, he may consider a switch to another series.
"I'm doing what I love to do, which is racing, but I'm not here just to participate. I'm here to do what I feel that I can do, and to feel happy and to feel that I am an important key in the team that I am working for, and if I don't have that I'm not interested to carry on.
"You always have some interests outside but I think maybe when the decision is one hundred per cent sure, we will see what we are looking at after that."