Question 1

Is LangChain better than DSPy?

Accepted Answer

It depends on your use case. LangChain is known for Framework for building applications with large language models, while DSPy Programming framework for LLMs — optimize prompts with code, not strings. See our full comparison above for a detailed breakdown.

Question 2

Is LangChain free?

Accepted Answer

LangChain pricing: Free + LangSmith paid.

Question 3

Is DSPy free?

Accepted Answer

DSPy pricing: Free (open-source).

Question 4

What are the main differences between LangChain and DSPy?

Accepted Answer

LangChain and DSPy differ in features, pricing, and platform support. LangChain: Framework for building applications with large language models. DSPy: Programming framework for LLMs — optimize prompts with code, not strings. See the full side-by-side comparison above for details.

Feature	LangChain	DSPy
Category	AI Agent Frameworks	Developer Tools
Pricing	Free + LangSmith paid	Free (open-source)
GitHub Stars	✓ More stars 98k	22k
Platforms	macOS, Linux, Windows	—
Key Features	✓ Chain composition ✓ RAG pipelines ✓ Agent toolkits ✓ Memory systems ✓ Streaming ✓ Multi-model ✓ LangGraph
Pros	+ Massive ecosystem and community + Modular and composable + Supports every major LLM provider + Excellent documentation + LangSmith for monitoring	+ Systematic prompt optimization + Composable and testable LLM programs + Works with any LLM provider + Backed by Stanford NLP
Cons	− Can be overly complex for simple tasks − Frequent breaking changes − Abstraction overhead − Steep learning curve	− Steep learning curve − Different paradigm from traditional prompting
Tags	open-sourceframeworkpythonjavascriptragchains

LangChainvsDSPy

LangChain

DSPy

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