Stan Rogow and Elliot Lurie are suing 18-year-old Carpenter, along with her parents and manager, for breach of contract and are seeking damages and restitution, according to The Hollywood Reporter.
Rogow and Lurie claim they were brought in after Carpenter signed with manager Bill Perlman because she wanted to boost her representation in the music industry.
They signed a music management agreement in 2011, under which they wouldd get half of Perlman's commissions, according to the complaint filed Wednesday in Los Angeles County Superior Court.
"Plaintiffs worked tirelessly to promote Sabrina and her music until their service were terminated, without cause," attorney Neville Johnson said in the complaint.
The duo was fired in August 2014.