
Seb
Co-Founder, engineering
Sebastien studied at McGill and later worked as a founding engineer at startups in healthcare and aviation. He now builds PolyChat's product and infrastructure.
Languages: English, French, Italian, Spanish
PolyChat is a language learning product built by a small family team. We make conversation practice, free web games, a translator, and original guides for teen and adult learners.
We started PolyChat because most language apps stop at tap-the-right-word drills. People can recognize vocabulary and still freeze when they have to speak. Our work is about getting learners into real sentences faster: dialogues, speaking practice, and games they can repeat without an energy system getting in the way.
The website is part of that product, not a holding page. You can play games in the browser, translate phrases, read study guides, and see original research from PolyChat learners. The mobile app adds full lesson paths, custom lesson creation, and speaking practice.
PolyChat is designed for teens and adults — travelers, students, and professionals. Our website, playable games, and advertising are not directed at children under 13. If you are a parent and believe a child has used the product, email us and we will delete the account.
These are the public pages Google and visitors can use without creating an account:
We show Google ads in playable web experiences and the mobile app, usually as interstitials between sessions or as rewarded ads the user chooses to watch. We do not place ads inside blog articles. How that data is handled is explained in the Privacy Policy.
Questions about the product, privacy, or this website can be sent to support@polychatapp.com.

Co-Founder, engineering
Sebastien studied at McGill and later worked as a founding engineer at startups in healthcare and aviation. He now builds PolyChat's product and infrastructure.
Languages: English, French, Italian, Spanish

Co-Founder, product and language
Jean-Baptiste graduated from the University of Vermont in 2019. He has worked in aerospace and as a freelancer while traveling widely. He writes much of PolyChat's language content and research.
Languages: English, French, Spanish

Co-Founder, design and publishing
Marc founded VidaLingua and Supercollider. He has a computer science degree from UT Austin and an MBA from INSEAD, and he advises the team on product and publishing.
Languages: English, French, Swedish