purporter
/pɜːrˈpɔːrtər/Definitions
1. noun
One that purports or professes something; a person who claims or asserts something, especially something false or unproven.
“The self-proclaimed expert turned out to be a mere purporter of false information.”
2. noun
A person or thing that purports to do or provide something, especially something of value or utility.
“The new app is a purporter of streaming services and online entertainment.”