English rugby's governing body said on Friday Bristol Bears Women, Ealing Trailfinders Women, Exeter Rugby Club, Gloucester-Hartpury Women's RFC, Harlequins, Leicester Tigers, Loughborough Lightning/Northampton Saints and Saracens were offered places.
However, there was no place for Wasps, Worcester, Sale and Darlington Mowden Park Sharks following a tender process which saw "strong proposals" submitted. But the RFU said that there was still a chance for teams to join at a later stage.
It added that it would work with the league and clubs on their potential to play in the league.
"The selection panel also made a strong recommendation for the RFU and WP15 to explore how greater geographical spread can be provided in the league," the RFU said in a statement.
"This process will begin in January when discussions with clubs and institutions will take place and will form part of the RFU's wider review of the women's competition structure in England."
Sale CEO Sid Sutton said that the team was "absolutely devastated" by the decision.
"We felt our submission fulfilled the criteria laid out by the RFU and demonstrated the commitment that everyone at the club has to our women's team and the wider women's game," Sutton said in a statement.
"As a result, everyone at Sale Sharks is absolutely devastated at today's decision to reject the club's application to remain part of the Premier 15s league."
DMP Sharks said in a statement they were in talks with the RFU to find a competitive solution for next season and beyond.
Sale CEO Sid Sutton said that the team was "absolutely devastated" by the decision.
"We felt our submission fulfilled the criteria laid out by the RFU and demonstrated the commitment that everyone at the club has to our women's team and the wider women's game," Sutton said in a statement.
"As a result, everyone at Sale Sharks is absolutely devastated at today's decision to reject the club's application to remain part of the Premier 15s league."
Clubs that have not been offered a place in next season's Premier 15s competition can appeal, the RFU said.
