LangChain vs Semantic Kernel
Side-by-side comparison of two AI agent tools
Short answer
- LangChain is growing faster: +23,097 GitHub stars in the last 30 days vs +165 for Semantic Kernel.
- Pick LangChain for: the agent engineering platform. Pick Semantic Kernel for: integrate cutting-edge LLM technology quickly and easily into your apps.
From GitHub data refreshed daily.
LangChainopen-source
The agent engineering platform
Semantic Kernelopen-source
Integrate cutting-edge LLM technology quickly and easily into your apps
Metrics
| LangChain | Semantic Kernel | |
|---|---|---|
| Stars | 147.4k | 28.6k |
| Star velocity /mo | 23.1k | 165 |
| Commits (90d) | 542 | 59 |
| Releases (6m) | 10 | 10 |
| Downloads (30d, npm + PyPI) | 169.4M | 287.7K |
| Overall score | 0.8918400192125109 | 0.661646916269183 |
Pros
- +Extensive ecosystem with seamless integration between LangGraph, LangSmith, and hundreds of third-party components
- +Future-proof architecture that adapts to evolving LLM technologies without requiring application rewrites
- +Strong community support with 131k+ GitHub stars and comprehensive documentation for both Python and JavaScript
- +Model-agnostic design supports multiple LLM providers including OpenAI, Azure OpenAI, Hugging Face, and local models
- +Enterprise-ready with built-in observability, security features, and stable APIs for production deployments
- +Multi-language support (Python, .NET, Java) with comprehensive agent orchestration and multi-agent system capabilities
Cons
- -Significant learning curve due to the framework's extensive feature set and multiple abstraction layers
- -Potential over-engineering for simple use cases that might be better served by direct API calls
- -Heavy dependency on the LangChain ecosystem which can create vendor lock-in concerns
- -Requires significant programming knowledge and understanding of AI agent concepts
- -Complex setup and configuration for advanced multi-agent workflows
- -Learning curve for mastering the framework's extensive feature set and architectural patterns
Use Cases
- •Building complex multi-agent systems that require planning, tool use, and coordination between different AI components
- •Creating production LLM applications with observability, debugging, and deployment infrastructure via LangSmith
- •Developing chatbots and conversational AI with memory, context management, and integration with external data sources
- •Building enterprise chatbots and conversational AI applications with reliable LLM integration
- •Creating complex multi-agent systems where specialized AI agents collaborate on business processes
- •Developing AI applications that need flexibility to switch between different LLM providers and deployment environments
FAQ
- Which is more popular, LangChain or Semantic Kernel?
- LangChain has more GitHub stars (147,399 vs 28,620).
- Which is more actively developed, LangChain or Semantic Kernel?
- LangChain had more commits in the last 90 days (542 vs 59).
- Should I use LangChain or Semantic Kernel?
- 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.