ChatTTS vs Ultravox

Side-by-side comparison of two AI agent tools

Short answer

  • Ultravox has had no commit in 9 months; ChatTTS is actively maintained.
  • ChatTTS is growing faster: +141 GitHub stars in the last 30 days vs +31 for Ultravox.
  • Pick ChatTTS for: a generative speech model for daily dialogue. Pick Ultravox for: a fast multimodal LLM for real-time voice.

From GitHub data refreshed daily.

A generative speech model for daily dialogue.

Ultravoxopen-source

A fast multimodal LLM for real-time voice

Metrics

ChatTTSUltravox
Stars39.9k4.6k
Star velocity /mo141.269841269841330.634920634920636
Commits (90d)00
Releases (6m)10
Overall score0.34724181031326410.2365584347917388

Pros

  • +专为对话场景优化，支持多说话者和自然对话流
  • +细粒度韵律控制，可生成笑声、停顿等对话元素
  • +超越大多数开源TTS模型的韵律质量表现
  • +无需单独 ASR 阶段，音频直接处理，响应速度更快
  • +支持多种开放权重模型（Llama、Mistral、Gemma）训练和扩展
  • +提供完整的实时语音 AI 代理构建平台和演示

Cons

  • -开源版本仅限学术用途，商业应用受限
  • -目前只支持中英文两种语言
  • -目前仅输出文本，尚未实现直接语音输出
  • -需要大量计算资源（默认 70B 模型）
  • -作为研究项目，生产环境稳定性可能有限

Use Cases

  • •LLM助手和聊天机器人的语音交互功能
  • •多角色对话系统和虚拟助手应用
  • •语音合成研究和对话系统开发实验
  • •构建实时语音客服或语音助手系统
  • •开发需要快速语音理解的多模态应用
  • •研究和实验下一代语音AI技术
View ChatTTS DetailsView Ultravox Details

FAQ

Which is more popular, ChatTTS or Ultravox?
ChatTTS has more GitHub stars (39,889 vs 4,575).
Which is more actively developed, ChatTTS or Ultravox?
ChatTTS had more commits in the last 90 days (0 vs 0).
Should I use ChatTTS or Ultravox?
Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.