Tools
Octave vs Rime Mist
Octave or Rime Mist? Their plans monthly and yearly, the capabilities their makers state, security and latest updates, side by side — read from the makers' own pages.
In short
- Both: Text to speech, Voice cloning, Many languages, API
Octave
Octave is Hume's text-to-speech API for expressive speech, custom voices, emotional delivery, and real-time audio streaming.
Plans
Free
Free
- 10,000 monthly included characters
- 5 minutes of monthly EVI usage included
- 15 requests per minute
- 1 concurrent connection
- Unlimited voice cloning (create and use)
Starter
- $3 / month
- 30,000 monthly included characters
- 40 minutes of monthly EVI usage included
- 5 concurrent connections
- Unlimited voice cloning (create and use)
Creator
- $14 / month
- 140,000 monthly included characters
- 200 minutes of monthly EVI usage included
- 75 requests per minute
- 5 concurrent connections
- Unlimited voice cloning (create and use)
Pro
- $70 / month
- 1,000,000 monthly included characters
- 1,200 minutes of monthly EVI usage included
- 10 concurrent connections
- Unlimited voice cloning (create and use)
Scale
- $200 / month
- 3,300,000 monthly included characters
- 5,000 minutes of monthly EVI usage included
- 20 concurrent connections
- 3 team seats
- Unlimited voice cloning (create and use)
Business
- $500 / month
- 10,000,000 monthly included characters
- 12,500 minutes of monthly EVI usage included
- 30 concurrent connections
- 5 team seats
- Unlimited voice cloning (create and use)
Enterprise
Price on request
- As much text-to-speech usage as you need
- As much EVI usage as you need
- As many concurrent connections as you need
- Unlimited team seats
- Unlimited voice cloning (create, use and access via API)
- Slack support
Prices checked 2026-09-25 on the maker’s page.
Capabilities
- Text to speech — “Generate expressive, natural-sounding speech that conveys the full range of human emotion.” source
- Voice cloning — “Choose from a curated library of expressive voices, clone any voice from a sample, or design entirely new voices from natural language descriptions.” source
- Many languages — “Native-quality speech in 16+ languages with authentic accents.” source
- API — “Octave is Hume's text-to-speech API with emotional intelligence.” source
Latest updates
- Octave 2: next-generation multilingual voice AI (Octave 2)
Launching Octave 2 for text-to-speech in 11 languages and EVI 4 mini for the speech-to-speech API.
Rime Mist
Rime Mist is an API-based text-to-speech model for real-time voice agents, customer calls, IVR systems, and other spoken applications.
Plans
Starter
- $0.03 / 1K characters
- $0.05 / 1K characters
- Get ~800 minutes free (about 800k characters)
- 20 concurrent TTS generations
- Public Slack support
- No credit card required
Enterprise
Price on request
- Volume pricing for large organizations running at scale
- Unlimited concurrent TTS generations
- Unlimited custom TTS voice clones
- SLAs + dedicated support
- Cloud, on-prem, or VPC
- BAA (HIPAA) and SOC 2 reports
Prices checked 2026-09-25 on the maker’s page.
Capabilities
- Text to speech — “Today we're releasing Mist v3 , our fastest and most efficient text-to-speech model to date, built for the latency and throughput demands of enterprise production voice deployments.” source
- Voice cloning — “Unlimited custom TTS voice clones” source
- Many languages — “Real fluency across 50+ languages, plus regional dialects and accents — with the same pronunciation controls to get names and terms right every time.” source
- API — “Yes. Drop Rime in through a simple API, or self-host when compliance demands it.” source
Security
- SOC 2 Type II — “As of May 2025, we are SOC 2 Type 2 compliant .” source
- SOC 2 — “As of May 2025, we are SOC 2 Type 2 compliant .” source
- GDPR — “work through MSAs, BAAs, and data processing agreements as part of enterprise onboarding” source
- HIPAA — “As of February 2024, we are HIPAA compliant .” source
- Not trained on your data — “We never use customer text or audio to train our models” source
Latest updates
- Product Updates
Model update with native coverage of natural sounding number sequences, word spelling, and pausing; users can add custom pauses and pronunciations.