Rime Review, Pricing & Alternatives (2026)

Rime is a voice AI company for production text to speech and speech to text in voice agents, IVR, and telephony. Its platform includes a regional cloud API, virtual private cloud deployment, and on premises installation through Docker Compose or Kubernetes. Rime does not publish a founding year, employee count, or total funding. Its cloud catalog lists 313 Coda voices across ten languages and 78 Mist v3 voices across four languages. Coda was released in May 2026, while Mist v3 launched in March 2026. The company reports approximately 37 milliseconds P50 time to first audio for Mist v3 in its benchmark, although that figure does not represent guaranteed end to end network latency. Enterprise plans add custom voice cloning, provisioned concurrency, service level agreements, dedicated support, and a HIPAA Business Associate Agreement.

A typical integration sends text to an HTTP or WebSocket endpoint and receives audio as generation proceeds. Coda is the recommended model for new applications, offering ten cloud languages and 313 voices, while Mist v3 prioritizes low time to first audio, custom pauses, and English inline pronunciation control. Speech-to-text accepts live audio through WebSocket or recordings through gRPC, with English and Spanish supported. Rime provides Python and Node quickstarts, word-level timestamps, custom lexicons, spelling controls, speed adjustment, and integrations with LiveKit and Pipecat. STT supports interim results for live calls, clean or word-for-word formatting, and custom vocabulary of up to 1,024 characters per request. Cloud, VPC, and on-premises deployment support different operating requirements. This workflow suits developers building interruption-aware assistants, IVR systems, or telephony products rather than occasional narration files.

Coda, released in May 2026, combines an LLM backbone with a dedicated speech engine trained on full-duplex conversational data. Rime reports sub-100-millisecond model latency, 313 voices across ten cloud languages, and word-level timestamps. Mist v3, released in March 2026, targets lower time to first audio and provides 78 voices in English, French, German, and Spanish. Its published benchmark reports approximately 37 milliseconds P50 time to first audio. Mist v3 supports custom pauses and English inline pronunciation control, while Rime also documents custom lexicons, spelling controls, and speed adjustment. Both models stream through HTTP and WebSockets and can run through Rime’s cloud API, virtual private cloud, or on-premises installations using Docker Compose or Kubernetes. These measurements describe model or benchmark performance, not guaranteed end-to-end network latency.

Rime’s pay-as-you-go TTS rates are $0.03 per minute for Mist v3 and $0.05 per minute for Coda v2. Billing is based on characters, with approximately 1,000 generated characters treated as one minute, while STT billing uses audio duration. STT remains free through November 19, 2026, then costs $0.002 per minute beginning November 20. The usage plan permits 15 concurrent Mist streams, 10 concurrent Coda streams, and 10 concurrent STT sessions. STT supports English and Spanish, with live WebSocket input and file transcription. Rime does not present a permanent free TTS plan. Enterprise pricing is custom and can add volume discounts, cloud, VPC, or on-premises deployment, provisioned concurrency, custom voices, SLAs, dedicated support, SOC 2 documentation, and a HIPAA BAA. Monthly card billing has no minimum, but agreement-specific billing terms should be checked.

Rime is strongest for production voice agents where low latency, pronunciation control, streaming, and deployment options affect live conversations. Its pay as you go TTS costs $0.03 per minute for Mist v3 and $0.05 for Coda v2, while STT supports English and Spanish and remains free through November 19, 2026. It is less suitable for creators wanting a visual studio, consumer voice marketplace, audiobook or video editing workflow, or fixed-price narration subscriptions. Compared with ElevenLabs, Rime is more focused on agent APIs, documented concurrency, and VPC or on-premises deployment. Compared with Cartesia, Rime offers both TTS and STT and documents on-premises installation. Compared with Deepgram, Rime has a larger published TTS catalog, while Deepgram is closer for transcription. Regulated teams building latency-sensitive voice software should choose Rime.