LangChain vs LlamaIndex: Which Should Your Agency Use?

The Orchestration Layer

You shouldn't write raw API calls to OpenAI. You need an orchestration framework. The industry is currently split between LangChain and LlamaIndex.

LlamaIndex: The Data Heavyweight

If your SaaS is purely focused on RAG—ingesting massive amounts of complex data (PDFs, Notion, SQL databases) and searching it—LlamaIndex is the superior tool. Its data connectors and indexing algorithms are highly optimized for document retrieval.

LangChain: The Agentic Toolkit

If you want to build autonomous agents that can use tools (e.g., an AI that searches Google, writes code, and sends an email), LangChain is unmatched. It provides the complex routing and memory management needed for true Agentic AI.

At Oktuv, our AI engineers are experts in both frameworks, allowing us to choose the right weapon for your specific SaaS use case.