Head-to-Head Comparison

Sesame AI (CSM) vs Chatterbox (Resemble AI)

Compare Sesame AI (CSM) and Chatterbox (Resemble AI) side by side. See which text-to-speech platform is better for your needs in 2025.

S

Sesame AI (CSM)

4.4/5
startup

Conversational Speech Model for emotionally intelligent, human-like AI speech.

C

Chatterbox (Resemble AI)

4.2/5
open-source

Open-source expressive TTS from Resemble AI with voice cloning.

Feature Comparison

FeatureSesame AI (CSM)Chatterbox (Resemble AI)
Rating
4.4/54.2/5
Starting Price
Free tier availableFree tier available
Languages
1+10+
Voice Cloning
API Available
Free Tier
Enterprise Plan

Pros & Cons

Sesame AI (CSM)

Pros

  • • Most natural conversational AI
  • • Emotional intelligence
  • • Open-source model available
  • • Novel approach to TTS
  • • Great for AI companions

Cons

  • • Very new technology
  • • Limited voices currently
  • • Higher compute requirements

Chatterbox (Resemble AI)

Pros

  • • Commercial-grade open-source quality
  • • Backed by established company
  • • Good voice cloning
  • • Active development
  • • MIT license flexibility

Cons

  • • Newer project
  • • Less community documentation
  • • GPU requirements

Other Comparisons

Sesame AI (CSM) vs Dia (Nari Labs)
Sesame AI (CSM) vs ElevenLabs
Sesame AI (CSM) vs OpenAI TTS

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