--- title: "LangChain vs LlamaIndex: Which is searched more?" description: "Is LangChain or LlamaIndex more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the AI agent frameworks set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time." canonical: "https://gobrandwave.com/demand/global-en/categories/ai-agent-frameworks/compare/langchain-vs-llamaindex" publisher: "Brandwave" --- # LangChain vs LlamaIndex: Which is searched more? Is LangChain or LlamaIndex more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the AI agent frameworks set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time. ## Key facts - **Compared**: LangChain and LlamaIndex - **Competitive set**: AI agent frameworks - **Market**: Global - **Month measured**: Sep 2026 - **LangChain Share of Search**: 59.6% - **LlamaIndex Share of Search**: 5.4% ## Is LangChain or LlamaIndex more popular in search? - In September 2026, LangChain had more branded searches than LlamaIndex among AI agent frameworks worldwide. LangChain had about 246,000 branded searches, while LlamaIndex had 22,200. LangChain made up 59.6% of all AI agent framework searches we track, and LlamaIndex accounted for 5.4%. - LangChain was ahead of LlamaIndex in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, LangChain’s share of searches among AI agent frameworks worldwide moved from 56.8% to 59.6%, and its estimated monthly branded searches moved from 301K to 246K. - Across the 12 months ending September 2026, LlamaIndex’s share of searches among AI agent frameworks worldwide moved from 7.6% to 5.4%, and its estimated monthly branded searches moved from 40.5K to 22.2K. ## Top AI agent frameworks in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, LangChain was mentioned in three out of five: in one of the three ChatGPT answers and in both Google AI Overviews. LlamaIndex was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. LlamaIndex was listed before LangChain in three out of five answers. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | CrewAI | 1st | 3 of 3 | 2 of 2 | 5 of 5 | | OpenAI Agents SDK | 2nd | 3 of 3 | 2 of 2 | 5 of 5 | | Pydantic AI | 3rd | 2 of 3 | 1 of 2 | 3 of 5 | | AutoGen | 4th | 1 of 3 | 1 of 2 | 2 of 5 | | LangChain | 5th | 1 of 3 | 2 of 2 | 3 of 5 | | LlamaIndex | 6th | 3 of 3 | 0 of 2 | 3 of 5 | | Semantic Kernel | 7th | 1 of 3 | 1 of 2 | 2 of 5 | ## Every AI answer about AI agent frameworks - Asked ChatGPT "Which AI agent framework should I use?": 1. OpenAI Agents SDK, 2. CrewAI, 3. LlamaIndex - Asked ChatGPT "What are the best AI agent frameworks?": 1. OpenAI Agents SDK, 2. CrewAI, 3. Pydantic AI, 4. LlamaIndex, 5. LangChain, 6. AutoGen, 7. Semantic Kernel - Asked ChatGPT "What's the best AI agent framework for building agents?": 1. OpenAI Agents SDK, 2. CrewAI, 3. Pydantic AI, 4. LlamaIndex - Searched Google, AI Overview "ai agent framework": 1. AutoGen, 2. CrewAI, 3. Pydantic AI, 4. LangChain, 5. Semantic Kernel, 6. OpenAI Agents SDK - Searched Google, AI Overview "build ai agents": 1. CrewAI, 2. OpenAI Agents SDK, 3. LangChain Brands are listed in the order each answer named them. The answers were collected in the United States on October 20, 2026. ## How did search popularity change for AI agent frameworks worldwide in September 2026? - In September 2026, LlamaIndex lost share of searches among AI agent frameworks worldwide, from 6.7% to 5.4%. - In September 2026, LangChain lost share of searches among AI agent frameworks worldwide, from 60.8% to 59.6%. ## Month by month | Month | LangChain estimated searches | LangChain Share of Search | LangChain rank | LlamaIndex estimated searches | LlamaIndex Share of Search | LlamaIndex rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 301K | 56.8% | 1 | 40.5K | 7.6% | 4 | | Nov 2025 | 301K | 61.1% | 1 | 33.1K | 6.7% | 4 | | Dec 2025 | 301K | 64.6% | 1 | 33.1K | 7.1% | 4 | | Jan 2026 | 301K | 59% | 1 | 40.5K | 7.9% | 4 | | Feb 2026 | 301K | 58% | 1 | 33.1K | 6.4% | 4 | | Mar 2026 | 368K | 55.1% | 1 | 49.5K | 7.4% | 4 | | Apr 2026 | 301K | 52% | 1 | 40.5K | 7% | 4 | | May 2026 | 301K | 55.8% | 1 | 40.5K | 7.5% | 3 | | Jun 2026 | 301K | 58.9% | 1 | 33.1K | 6.5% | 4 | | Jul 2026 | 246K | 56.7% | 1 | 33.1K | 7.6% | 3 | | Aug 2026 | 246K | 60.8% | 1 | 27.1K | 6.7% | 4 | | Sep 2026 | 246K | 59.6% | 1 | 22.2K | 5.4% | 4 | ## How each brand is measured Brandwave collects information about searches that people make online using LangChain’s and LlamaIndex’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading. - **LangChain**: Measured on the search term “langchain”. - **LlamaIndex**: Measured on the search term “llamaindex”. - [LangChain profile](/demand/global-en/brands/langchain) - [LlamaIndex profile](/demand/global-en/brands/llamaindex) - [All AI agent frameworks worldwide](/demand/global-en/categories/ai-agent-frameworks): The set both shares are measured inside, 7 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is LangChain or LlamaIndex more popular in search? In September 2026, LangChain had more branded searches than LlamaIndex among AI agent frameworks worldwide. LangChain had about 246,000 branded searches, while LlamaIndex had 22,200. LangChain made up 59.6% of all AI agent framework searches we track, and LlamaIndex accounted for 5.4%. ## Cite this page Brandwave. "LangChain vs LlamaIndex: Which is searched more?". https://gobrandwave.com/demand/global-en/categories/ai-agent-frameworks/compare/langchain-vs-llamaindex This page is also available as HTML at https://gobrandwave.com/demand/global-en/categories/ai-agent-frameworks/compare/langchain-vs-llamaindex. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.