Google Vertex AI Search vs RAGatouille
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
Google Vertex AI Search ranks higher on Top 11 (#6 vs #11) for Developers shipping RAG pipelines into production. A fully managed, highly scalable RAG-as-a-service for enterprises operating on Google Cloud.
At a glance
| Google Vertex AI Search | RAGatouille | |
|---|---|---|
| Top 11 rank | #6 / LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026 | #11 / LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026 |
| Score (out of 9.4) | 8.2 | — |
| Best for | Managed RAG on GCP | Advanced ColBERT retrieval |
| Pricing | Usage-Based | Free (Open Source) |
| HQ | Mountain View, USA | Remote |
| Founded | 2021 | 2023 |
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
RAGatouille
A specialized library implementing the advanced ColBERT model for more accurate, fine-grained retrieval.
github.com/bclavie/RAGatouilleSee 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.