Overview
Rime is a text-to-speech platform purpose-built for real-time, human-sounding voice in production systems — contact centers, IVR menus, and AI voice agents rather than podcast or audiobook narration. It streams audio in under 100 milliseconds and exposes two models: Mist v3 for the lowest latency and Coda for the most natural expression. Unlike creator-first TTS vendors, Rime charges by usage (per 1,000 characters) instead of a flat seat fee, and it can run in the cloud, inside a VPC, or fully on-premises. For teams shipping voice into regulated or high-volume workflows, that combination of latency, pricing transparency, and deployment control is the core reason to pick it.
Key Features
- Sub-100ms streaming with Mist v3 (first audio in as little as ~37ms) and Coda for expressive speech
- Usage-based pricing from about $0.03 per 1,000 characters, no monthly seat minimum
- 180+ voices across many languages with a Spell function for exact pronunciation
- Cloud, VPC, and on-prem deployment via Docker or Kubernetes with HIPAA BAA and SOC 2 Type II
- Framework support for LiveKit, Pipecat, and Twilio plus word-level timestamps
Pricing
| Plan | Price | For |
|---|---|---|
| Starter | Free ~800 min, then from $0.03 / 1K chars | Prototyping, 20 concurrent gens, no card needed |
| Growth | Volume commit (≈$5K/yr in some docs) | Sustained workloads, higher concurrency, SOC 2 + BAA |
| Enterprise | Custom | Unlimited clones, on-prem/VPC, SLAs, dedicated support |
Comparison
Compared to ElevenLabs, Rime trades a giant consumer voice marketplace for lower latency and predictable per-character billing that scales with call volume. Compared to Cartesia, Rime is narrower (TTS only, no bundled STT/LLM orchestration) but offers on-prem and VPC deployment that regulated contact centers often require.