On December 10, 2015, Franch signed with the National Women's Soccer League club, Portland Thorns FC, after rights to her were traded from the expansion Orlando Pride.[16] As a back-up keeper to Michelle Betos she helped the Thorns win the NWSL Shield in the 2016 season, recording three shutouts in six appearances. As starting keeper in 2017, she set a league record with 11 shutouts in the regular season,[17] helped the Thorns win the NWSL Championship in a 1–0 shutout over the North Carolina Courage, and was named NWSL Goalkeeper of the Year.[18]