LlamaIndex: What It Is And How To Get Started [2026 Guide]

LlamaIndex is a data framework designed to enhance artificial intelligence applications by connecting large language models (LLMs) with various data sources such as PDFs, databases, and applications like Slack and Notion. Developed in 2022, LlamaIndex improves the efficiency and accuracy of data retrieval through a process involving data ingestion, processing, indexing, and querying, ultimately integrating with applications for deployment. Its use has shown significant improvements in productivity, cost reduction, and customer engagement for businesses leveraging AI. LlamaIndex is particularly beneficial for industries like customer support, healthcare, e-commerce, and financial services, helping to extract relevant data for improved decision-making and personalized customer experiences. While LlamaIndex excels in efficient data handling, it contrasts with other tools like LangChain, which is better for creating complex workflows, and Voiceflow, which focuses on designing and deploying conversational agents across multiple platforms.