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Top 11 ai engineering · retrieval augmented generation that work with Opensearch

Haystack is the highest-ranked provider in the Top 11 The 11 Best RAG Frameworks (2026) that integrates with Opensearch.

Why this answer

Filtered to entries that publicly document a Opensearch integration. We do not include "API available" as proof of integration — there has to be a named connector or first-class workflow.

Showing all 2 matches. Top 11 publishes whatever the data supports — we don’t pad lists. See the full ranked The 11 Best RAG Frameworks (2026).

  1. #1Haystack(rank #3 in The 11 Best RAG Frameworks (2026))

    8.9/9.4

    A mature, enterprise-focused framework for building scalable neural search and complex RAG pipelines.

    Full Haystack review · Compare: Haystack vs Amazon Bedrock Knowledge Bases · Alternatives

  2. #2Amazon Bedrock Knowledge Bases(rank #7 in The 11 Best RAG Frameworks (2026))

    8.1/9.4

    A fully managed service for building RAG applications, tightly integrated with AWS data sources and models.

    Full Amazon Bedrock Knowledge Bases review · Alternatives

Methodology: /methodology · No paid placement ever · Verified .