Best AI tools for retrievers
3 tools in the RAG category, filtered to retrievers.
LangChain
RAG · BYO (any major LLM)
8.3
The broad LLM application framework — chains, agents, retrievers.
Freemium· Free open-source; LangSmith paidgeneral LLM appsRAG
Haystack
RAG · Multi-model
6.9
Open-source Python framework from deepset for building production RAG pipelines and LLM agents.
Freemium· Open-source free; deepset Enterprise Support and AI Platform via salesragagents
ClickHouse
RAG
The open-source columnar database powering real-time analytics — and, increasingly, LLM observability and RAG backends.
Freemium· Open-source self-managed: free. ClickHouse Cloud: from $50/month (usage-based on compute + storage, AWS/GCP/Azure). Enterprise tier available with dedicated support and BYOC options.LLM trace and cost analyticsRAG retrieval with hybrid vector + metadata filters