Best RAG AI tools
Retrieval-augmented generation — tools that ground model answers in your own documents and data. The 15 highest-ranked of the 21 apps tagged RAG in the Onei AI catalogue.
Everything tagged RAG: apps, skills and MCP servers
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An Apache-2.0 TypeScript framework for building AI agents — workflows, memory, RAG and evals — with a local studio and an agentic software factory on top.
Also: Agents, Open Source · Editor's pick
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Turn any website into clean markdown or structured JSON — crawling, JavaScript rendering, and extraction in one API.
Also: API, Data Extraction, Open Source · Editor's pick
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Vectify AI
A vectorless RAG engine that builds a tree index of long PDFs and lets an LLM reason its way to the right section, with page-level citations.
Also: Document Processing, MCP, Open Source · Editor's pick
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You.com sells web search, content extraction, answer and research APIs for AI agents; its consumer chat closed to new users in 2026.
Also: API, Developers, MCP
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Google
Google's AI research notebook (formerly NotebookLM): ask cited questions of your sources and turn them into audio, video and study guides.
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Retool
Retool's AI layer: generate internal apps from prompts on live company data, plus AI workflows and hourly-billed agents with enterprise controls.
Also: Agents
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IBM (DataStax)
Open-source, MIT-licensed visual builder for AI agents, RAG apps and MCP servers, maintained by IBM's DataStax and extensible in Python.
Also: Agents, MCP, Open Source
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Evokoa
Turn a Postgres database into working memory for AI agents — relational rows, graph traversal and vector search fused into one ranked, token-budgeted context block.
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Olostep Technologies, Inc.
One API to search, scrape, crawl, map and monitor the web, returning clean structured text that AI agents and RAG pipelines can use directly.
Also: API, Data Extraction, Developers
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Glean Technologies, Inc.
Enterprise Work AI platform — permission-aware search across every company app, plus an assistant and agents that act on the results.
Also: Semantic Search
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A search API purpose-built for RAG and agents — returns synthesised, cited content instead of a list of links.
Also: API, Developers, Web Search
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ETL for unstructured data — turn PDFs, slides, emails, and images into clean, AI-ready structured output.
Also: Data Extraction, Document Processing, PDF
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An open-source AI-native database combining vector search, structured filtering, and built-in model integrations.
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A fully managed vector database for semantic search and retrieval at billion-scale, with no infrastructure to run.
Also: Semantic Search, Vector Database
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Document parsing and retrieval built for agents — turn messy PDFs into structured, queryable context.
Also: Developers, Document Processing, PDF
How this list is ranked
Ranked by editorial weight (0–100), plus 5 points per bookmark up to 10, plus or minus up to 20 for the average review rating; ties go to featured apps, then the most recently updated. Discontinued apps are never ranked.