Antoine Courvoisier was born in Geneva in 1994. From the age of five, he took piano lessons, and at ten joined the Cie Acrylique's theatre workshop. 

Since graduating from the École de Théâtre Serge Martin in 2016, he has worked on several occasions with Evelyne Castellino (Macbeth, Juste après ou Juste avant, Un Discours, À la ligne), Joan Mompart (Intendance, Mon Chien-Dieu, D'eux), Françoise Courvoisier (Oldamir Alsmatoff, La Remplaçante, Il jouait du piano debout). He tours in France and Switzerland in 2018-19 with Les Séparables by Fabrice Melquiot, Christiane Suter and Dominique Catton, as well as Le Dernier Métro by Dorian Rossel, then from 2020 to 2024 with Normalito by Pauline Sales.

He has also created shows as part of a collective, including La Nef des Fous in 2018 and Tchekhov Revisité in 2020. With Delphine Barut, Angelo Dell'Aquila and Clea Eden, he founded Compagnie Mokett in 2014, whose two most recent productions are Le Paradis des Chats at TMG in 2022 (directed by Delphine Barut, based on Zola), and Dégueu at Am Stram Gram in 2023 (written and directed by Antoine Courvoisier). He is also touring Le Promptu with Bastien Blanchard and Les Cabarets with Charlotte Filou as a musicomic duo.

In 2022 he created Le Discours, a one-man show adapted from the novel by Fabcaro. In 2024, he took part in the musical creation of Au Service Secret de la Confédération (Gaspard Boesch and Philippe Cohen), then co-wrote and co-directed Broker at the Théâtre du Loup with Angelo Dell'Aquila.

In the 2024-25 season, he continues his collaboration with Pauline Sales as actor, composer and pianist in Les Deux Déesses, touring France, and will next direct a show at the Théâtre du Poche in Geneva.