R2R
RAG as a deployable server with an API, not a library to assemble.
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sovereigntyR2R packages retrieval as a service you deploy: a REST API for ingestion and search, user and document management, hybrid search, knowledge-graph construction and observability, all in one container. The distinction from LlamaIndex matters — R2R is closer in shape to what you were buying from Vectara, so the migration is more of a swap and less of a rebuild. MIT licensed.
OPEN SOURCEMITSELF-HOSTLOCAL-FIRST
LicenseMIT
PricingFree, MIT. Optional hosted tier from the maintainers.
Open sourceYes
Self-hostableYes
Local-first dataYes
What it does well
- +Deployable RAG server — closest shape to a managed platform
- +Ingestion, hybrid search and user management included
- +Knowledge-graph construction built in
- +MIT licensed
Where it falls short
- −Younger and smaller community than LlamaIndex or Haystack
- −Server shape means less granular control than a framework
- −Fewer ingest connectors out of the box
R2R as an alternative to
Where R2R shows up in our comparisons, and how it ranked.
R2R head-to-head
Straight comparisons against the tools people weigh it against.