there were some past submissions that seem to indicate they were playing around in the "clone your voice, fool your friends" space

https://news.ycombinator.com/item?id=29786132 -- Show HN: Clone your voice and speak a foreign language (January 3, 2022 — 513 points, 112 comments)

https://news.ycombinator.com/item?id=31728939 -- Show HN: Voice Clones for Creators (June 13, 2022 — 71 points, 63 comments)

clicking on the domain name next to any submission shows their other ones https://news.ycombinator.com/from?site=coqui.ai