What is the best free alternative to Sesame CSM?
Copilot Audio Expressions is the closest free alternative to Sesame CSM: same AI Voice & Speech sub-category, and it is free. Turns text into expressive speech using Microsoft's MAI-Voice models
Best free Sesame CSM alternatives
Looking for a free alternative to Sesame CSM? Here are 9 ai voice & speech worth trying — 9 with a free tier. Sesame CSM itself is free.
| Tool | Sesame CSM (you searched) | Copilot Audio Expressions | Zonos | Kokoro Web |
|---|---|---|---|---|
| Pricing | free | free | free | free |
| Best for | Open Apache-2.0 conversational speech model generating context-aware, natural speech | Turns text into expressive speech using Microsoft's MAI-Voice models | Apache-2.0 TTS with emotion, pitch and speaking-rate conditioning | Free web front-end and API for the Kokoro-82M TTS model, self-hostable and OpenAI-compatible |
| Visit | Open ↗ | Open ↗ | Open ↗ | Open ↗ |
Sesame CSM alternatives — straight answers
Are there free Sesame CSM alternatives?
Yes — 9 of the 9 alternatives listed here are free or freemium: Copilot Audio Expressions, Zonos, Kokoro Web, ElevenLabs, Cartesia. None of them are paid-only.
Is Sesame CSM free?
Sesame CSM is free. There is no paid plan attached to it in the catalog.
How were these Sesame CSM alternatives chosen?
They are the other tools in AI Voice & Speech, then the rest of Content & Media Generation, ordered free tiers first and capped at 9. There is no sponsorship and no paid placement in that ordering — only the pricing tier decides.
All Sesame CSM alternatives
Browse AI Voice & Speech →Copilot Audio Expressions
AI Voice & Speech
✦ WhyA Sesame CSM alternative — Turns text into expressive speech using Microsoft's MAI-Voice models.
- Turns text into expressive speech using Microsoft's MAI-Voice models
- Control emotion, style and personality
- Free in the browser, no mandatory login per press reports
- MAI-Voice-2 supports 15 languages
Zonos
AI Voice & Speech
✦ WhyA Sesame CSM alternative — Apache-2.0 TTS with emotion, pitch and speaking-rate conditioning.
- Apache-2.0 TTS with emotion, pitch and speaking-rate conditioning
- Voice cloning from a short reference clip
- Multilingual output; free playground on Zyphra site
Kokoro Web
AI Voice & Speech
✦ WhyA Sesame CSM alternative — Free web front-end and API for the Kokoro-82M TTS model, self-hostable and OpenAI-compatible.
- Free web front-end and API for the Kokoro-82M TTS model, self-hostable and OpenAI-compatible
- Browser-only versions run the model locally via WebGPU with no signup
- Many English and multilingual voices; unlimited use
ElevenLabs
AI Voice & Speech
✦ WhyA Sesame CSM alternative — Most natural text-to-speech and voice cloning.
- Most natural text-to-speech and voice cloning
- Dubbing into 30+ languages
- Voice design and a huge voice library
- Free monthly characters
Cartesia
AI Voice & Speech
✦ WhyA Sesame CSM alternative — Ultra-low-latency real-time voice (Sonic).
- Ultra-low-latency real-time voice (Sonic)
- Ideal for voice agents and calls
- Instant voice cloning
- Free tier for developers
Hume AI
AI Voice & Speech
✦ WhyA Sesame CSM alternative — Emotionally expressive voice interface (EVI).
- Emotionally expressive voice interface (EVI)
- Detects and responds to tone
- Customizable empathic voices
- Free developer credits
Fish Audio
AI Voice & Speech
✦ WhyA Sesame CSM alternative — 15-second voice cloning claimed near-perfect fidelity.
- 15-second voice cloning claimed near-perfect fidelity
- S2.1 Pro real-time emotionally-controllable voice model, free to start for devs
- Bundles TTS, voice cloning, STT and a full voice-agent stack in one platform
Speechify
AI Voice & Speech
✦ WhyA Sesame CSM alternative — Free tier includes unlimited basic TTS at up to 1.5x speed with 10 voices.
- Free tier includes unlimited basic TTS at up to 1.5x speed with 10 voices
- Scan & Listen turns physical text/photos into audio
- AI Podcasts and Voice AI Assistant bundled into Premium beyond plain reading
Rime
AI Voice & Speech
✦ WhyA Sesame CSM alternative — 3,000 free minutes on signup, no card required, before any payment.
- 3,000 free minutes on signup, no card required, before any payment
- Two model options: Mist (ultra-low latency) vs Coda (natural expression)
- 600+ voices across 50+ languages built for real-time voice-agent use