Question 1

Is LangChain better than LiteLLM?

Accepted Answer

It depends on your use case. LangChain is known for Framework for building applications with large language models, while LiteLLM Unified API proxy for 100+ LLM providers — one interface, any model. See our full comparison above for a detailed breakdown.

Question 2

Is LangChain free?

Accepted Answer

LangChain pricing: Free + LangSmith paid.

Question 3

Is LiteLLM free?

Accepted Answer

LiteLLM pricing: Free (open-source), hosted proxy available.

Question 4

What are the main differences between LangChain and LiteLLM?

Accepted Answer

LangChain and LiteLLM differ in features, pricing, and platform support. LangChain: Framework for building applications with large language models. LiteLLM: Unified API proxy for 100+ LLM providers — one interface, any model. See the full side-by-side comparison above for details.

Feature	LangChain	LiteLLM
Category	AI Agent Frameworks	LLM APIs & Inference
Pricing	Free + LangSmith paid	Free (open-source), hosted proxy available
GitHub Stars	✓ More stars 98k	16k
Platforms	macOS, Linux, Windows	Linux, macOS, Docker
Key Features	✓ Chain composition ✓ RAG pipelines ✓ Agent toolkits ✓ Memory systems ✓ Streaming ✓ Multi-model ✓ LangGraph	✓ Unified API for 100+ LLM providers ✓ Load balancing across multiple API keys/providers ✓ Automatic fallbacks when providers fail ✓ Spend tracking and budget alerts per team/project ✓ Rate limiting and retry logic built-in ✓ OpenAI SDK compatible — zero code changes ✓ Self-hostable proxy server ✓ Supports streaming, function calling, vision
Pros	+ Massive ecosystem and community + Modular and composable + Supports every major LLM provider + Excellent documentation + LangSmith for monitoring	+ One API for 100+ providers + Built-in load balancing and fallbacks + Spend tracking and rate limiting + OpenAI SDK compatible
Cons	− Can be overly complex for simple tasks − Frequent breaking changes − Abstraction overhead − Steep learning curve	− Adds a proxy layer (slight latency) − Complex config for advanced features
Tags	open-sourceframeworkpythonjavascriptragchains	api-gatewaymulti-providerproxyopen-source

LangChainvsLiteLLM

LangChain

LiteLLM

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