introducer

/ˌɪntrəˈdusər/
noun
  1. A person who makes someone known to another person or who presents something, such as a speaker or a program.
    • He was the introducer at the awards ceremony.
    • She acted as the introducer for the guest lecturer.
    • The introducer forgot the speaker's name for a moment.
  2. A person or thing that brings something into use or existence for the first time.
    • The company is the introducer of several popular apps.
    • She is known as the introducer of yoga classes in our town.
    • The inventor was the introducer of the new engine design.