LlamaIndex vs Google Vertex AI Search
Side-by-side from the Top 11 ranking of LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026. Last verified May 31, 2026.
The short answer
LlamaIndex ranks higher on Top 11 (#2 vs #6) for Developers shipping RAG pipelines into production. A data-centric framework excelling at advanced indexing and retrieval strategies for high-accuracy RAG.
At a glance
| LlamaIndex | Google Vertex AI Search | |
|---|---|---|
| Top 11 rank | #2 / LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026 | #6 / LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026 |
| Score (out of 9.4) | 9.2 | 8.2 |
| Best for | Best for data-centric RAG | Managed RAG on GCP |
| Pricing | Free (Open Source) | Usage-Based |
| HQ | San Francisco, USA | Mountain View, USA |
| Founded | 2022 | 2021 |
LlamaIndex
A data-centric framework excelling at advanced indexing and retrieval strategies for high-accuracy RAG.
www.llamaindex.ai/See full entry in LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026
Google Vertex AI Search
A fully managed, highly scalable RAG-as-a-service for enterprises operating on Google Cloud.
cloud.google.com/vertex-ai-search-and-conversationSee full entry in LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026
Methodology and scoring weights live at /methodology. No vendor pays for placement — see about.