Which is more popular, Pipecat or Ultravox?

Pipecat has more GitHub stars (16,152 vs 4,573).

Which is more actively developed, Pipecat or Ultravox?

Pipecat had more commits in the last 90 days (2,870 vs 0).

Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.

Side-by-side comparison of two AI agent tools

Ultravox has had no commit in 9 months; Pipecat is actively maintained (2,870 commits in the last 90 days).
Pipecat is growing faster: +830 GitHub stars in the last 30 days vs +30 for Ultravox.
Pick Pipecat for: open Source framework for voice and multimodal conversational AI. Pick Ultravox for: a fast multimodal LLM for real-time voice.

From GitHub data refreshed daily.

Open Source framework for voice and multimodal conversational AI

Ultravoxopen-source

A fast multimodal LLM for real-time voice

+Voice-first architecture with built-in speech recognition and text-to-speech integration for natural conversational experiences
+Comprehensive ecosystem with client SDKs for multiple platforms and additional tools for structured conversations and UI components
+Modular, composable pipeline system that supports integration with various AI services and transport protocols for flexible development

-Python-only framework which may limit developers working primarily in other languages
-Real-time voice processing complexity may require significant learning curve for developers new to audio/video handling

•Building voice assistants and AI companions for customer support, coaching, or meeting assistance applications
•Creating multimodal interfaces that combine voice, video, and images for interactive storytelling or creative content generation
•Developing business automation agents for customer intake, support workflows, or guided user interactions with structured dialog systems

Which is more popular, Pipecat or Ultravox?: Pipecat has more GitHub stars (16,152 vs 4,573).
Which is more actively developed, Pipecat or Ultravox?: Pipecat had more commits in the last 90 days (2,870 vs 0).
Should I use Pipecat or Ultravox?: Compare their capabilities, limitations and "best for" notes above. Trying each on a small task is the fastest way to decide.