upii is an open-source, local-first memory and retrieval-augmented generation (RAG) library for AI applications. It allows developers to build AI systems that answer questions over personal documents with cited sources, all running 100% on-device for privacy. Ideal for privacy-conscious AI developers and applications requiring local data processing.
In the RAG, search & retrieval space, upii takes a focused approach. It focuses on enabling private, on-device retrieval-augmented generation and memory for AI over personal documents. It is built as an open-source project for AI developers seeking local RAG solutions. upii is open source under the MIT license. upii is available on the command line, and it can be self-hosted.
It is developed by maddymaster, and the product first shipped in 2026. Key capabilities include local storage, cited answers, and document ingestion.
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