Gradium (Kyutai spin-out, Paris) · Voice Agents

Gradium

Paris voice API company spun out of Kyutai by the Moshi team — streaming TTS, STT with 80ms semantic turn detection, speech-to-speech translation across five languages, and the open-source GradBot agent framework. Seed extended past $100M on 8 July 2026 with NVIDIA joining the $70M round closed in December 2025. Paid plans run $13–$1,615/mo.