ClosedRime/10 trustVerified

Rime

Name: Rime
Rating: 7

Low-latency expressive TTS for conversational agents: Arcana, Mist and Coda models via one API.

About

Rime is a San Francisco voice-AI startup (founded 2022) that sells low-latency text-to-speech for conversational agents. Its model lineup is built around Arcana, the flagship expressive conversational model, plus Mist v2 and Mist v3 for ultra-low-latency streaming, and Coda, the newest balanced model. The API is a straightforward HTTP POST to users.rime.ai that returns audio bytes, with WebSocket, SSE and streaming variants for real-time use, and the company also sells on-premises deployments to enterprises.

Pricing is $0.03 per 1,000 characters on Starter ($30 per million), $0.04 for Arcana and $0.05 for Coda, with 20 concurrent generations on the no-plan-fee Starter tier. On the independent TTS Arena leaderboard, Coda sat around 55th in the October 2026 snapshot — respectable but not chart-topping. Enterprise buyers get custom voice clones, SLAs and VPC/on-prem options.

Specs

Context window

Up to 3,000 characters per request (Arcana); 500 for ultra-low-latency Mist v3; streaming HTTP/WebSocket/SSE

Pricing

Per 1K chars: $0.03 Starter/Mist v3, $0.04 Arcana, $0.05 Coda; enterprise custom

Free quota

Starter tier has no plan fee; enterprise quotes on request

API access

API available — POST /v1/rime-tts at users.rime.ai (API key); streaming variants supported

Weights

Closed — API only

Released

Not disclosed

Benchmarks

TTS Arena (independent, LMArena-style): Coda ranked ~55th in the Oct 2026 snapshot — mid-table

Provider-reported unless a source says otherwise. Benchmarks are marketing-adjacent by nature — treat them as directional.

Use cases

text-to-speechvoice-agentsconversational-aicustomer-supportreal-time-tts

Trust score — 7/10

/10 trustVerified

Scored 7/10 (TIER verified, metrics-v1). Evidence: rime.ai product and pricing pages; public API docs (docs.rime.ai); TTS Arena ranking (~55th, Oct 2026). Strengths: purpose-built for low-latency conversational use, simple API, no-plan-fee Starter tier, on-prem option. Docked for: (1) mid-table independent benchmark placement; (2) smaller voice/language catalog than the hyperscalers; (3) startup longevity risk. License: proprietary (Rime API).

How the trust score is built

Full methodology →

Adoption · stars/downloads, log-scaled vs peers: 6.0/10
Maintenance · recency, releases, issue load: 6.0/10
Openness · license + docs: 3.0/10
Manual review · sanity read + red-flag check: 7.0/10

· SF startup founded 2022; models: Arcana (flagship), Mist v2/v3 (low-latency streaming), Coda (newest)
· API: POST /v1/rime-tts at users.rime.ai; WebSocket/SSE streaming; on-prem enterprise option
· Pricing: $0.03/1K Starter, $0.04 Arcana, $0.05 Coda; TTS Arena ~55th (Oct 2026, independent)
· Rime logo fetch attempted; staged only if a valid official asset downloads