The Algeria international will see his current contract in Germany expire at the end of the season.
He says Frankfurt are keen to agree fresh terms, but the 27-year-old is yet to put pen to paper.
Instead, he is keeping his options open, with there reported to be interest in his services from Premier League outfit Fulham and Ligue 1 pair Marseille and Lyon.
Matmour said: "I have three interesting offers at the moment, but I could stay in Germany because Eintracht want me to sign a new contract.
"I want to go to a club where I could play regularly and score goals for them."
Asked about Fulham, he added: "Fulham are a good London club and attractive to me, so you never know.
"I do not know if they are interested in me, but we will see in the next few weeks when I make a decision."