Top 11 ai engineering · retrieval augmented generation that work with Elasticsearch
Haystack is the highest-ranked provider in the Top 11 LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026 that integrates with Elasticsearch.
Why this answer
Filtered to entries that publicly document a Elasticsearch integration. We do not include "API available" as proof of integration — there has to be a named connector or first-class workflow.
Showing all 1 matches. Top 11 publishes whatever the data supports — we don’t pad lists. See the full ranked LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026.
#1Haystack(rank #3 in LangChain vs LlamaIndex vs Haystack: 11 Best RAG Frameworks 2026)
8.9/9.4A mature, enterprise-focused framework for building scalable neural search and complex RAG pipelines.
Methodology: /methodology · No paid placement ever · Verified .