$22.0M
+$22.0M this year1 filing since 2026 · latest Equity filed
Rime Labs is a San Francisco voice AI company that builds speech synthesis models for high-volume, real-time enterprise conversations. Its models are trained on a proprietary in-house-recorded dataset of spontaneous, full-duplex conversational speech including interruptions, laughter and disfluencies. Rime sells API access and on-premises deployments to companies running automated phone interactions, and reports powering over 1.5 million conversation minutes. It was founded in 2022 by Lily Clifford, Brooke Larson and Ares Geovanos.
What sets it apart
Rime records its own spontaneous conversational speech data rather than training on read audiobook-style corpora, which it uses to deliver sub-100ms time-to-first-byte and deterministic pronunciation control for brand names and IDs - the failure modes that matter in production phone calls rather than in demos.
Rime's conversational text-to-speech model, optimized for real-time dialogue in production voice agents and available via API or self-hosted deployment.
