AG-UI vs LangChain

Side-by-side comparison of two AI agent tools

Short answer

  • LangChain has had no commit in 32 months; AG-UI is actively maintained (1,674 commits in the last 90 days).
  • AG-UI is growing faster: +1,300 GitHub stars in the last 30 days vs +2 for LangChain.
  • Pick AG-UI for: aG-UI: the Agent-User Interaction Protocol. Pick LangChain for: reference implementations of several LangChain agents as Streamlit apps.

From GitHub data refreshed daily.

A
AG-UIopen-source

AG-UI: the Agent-User Interaction Protocol. Bring Agents into Frontend Applications.

LangChainopen-source

Reference implementations of several LangChain agents as Streamlit apps

Metrics

AG-UILangChain
Stars16.3k1.6k
Star velocity /mo1.3k2.2105263157894735
Commits (90d)1.7k0
Releases (6m)100
Downloads (30d, npm + PyPI)8.9M—
Overall score0.88886734710595560.16744302204886327

Pros

    • +Multiple complete, working examples covering diverse agent patterns from basic chat to complex document Q&A systems
    • +Ready-to-deploy Streamlit applications with live demos available for immediate testing and exploration
    • +Demonstrates best practices for LangChain-Streamlit integration including callback handling, memory management, and user feedback collection

    Cons

      • -Some examples use potentially unsafe tools like PythonAstREPLTool that are vulnerable to arbitrary code execution
      • -Limited to the LangChain ecosystem and may not showcase integration with other agent frameworks or libraries
      • -Most examples require external API keys and services to run fully, creating setup barriers for immediate testing

      Use Cases

        • •Rapid prototyping of conversational AI agents with interactive web interfaces for testing and demonstration
        • •Building document Q&A systems that can chat about custom content and provide contextual answers from uploaded files
        • •Creating natural language interfaces for database queries and data analysis tools
        View AG-UI DetailsView LangChain Details

        FAQ

        Which is more popular, AG-UI or LangChain?
        AG-UI has more GitHub stars (16,275 vs 1,644).
        Which is more actively developed, AG-UI or LangChain?
        AG-UI had more commits in the last 90 days (1,674 vs 0).
        Should I use AG-UI or LangChain?
        Compare their capabilities, limitations and "best for" notes above. Both are open source, so trying each on a small task is the fastest way to decide.