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AI · March 28, 2026

RustyRAG

The Fastest RAG API

What it does

Open-source RAG API written in Rust. Sub-200ms time to first token, 94.5% accuracy on 3,000+ questions. Hybrid search with reranking, streaming answers. Upload PDFs, ask questions, get answers fast. Self-host the whole thing in minutes. Connect knowledge to your Voice AI, AI Agents and any product where retrieval speed is the bottleneck.

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    Hey there HN! We’re Antonio, Luca, and Yuhang, and we’re excited to introduce Fast GraphRAG, an open-source RAG approach that leverages knowledge graphs and the 25 years old PageRank for better information retrieval and reasoning. Building a good RAG pipeline these days takes a lot of manual optimizations. Most engineers intuitively start from naive RAG: throw everything in a vector database and hope that semantic search is powerful enough. This can work for use cases where accuracy isn’t too important and hallucinations are tolerable, but it doesn’t work for more difficult queries that…

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    Hey HN, I’m Zach from Superpowered AI (YC S22). We’ve been working in the RAG space for a little over a year now, and we’ve recently decided to open-source all of our core retrieval tech. spRAG is a retrieval system that’s designed to handle complex real-world queries over dense text, like legal documents and financial reports. As far as we know, it produces the most accurate and reliable results of any RAG system for these kinds of tasks. For example, on FinanceBench, which is an especially challenging open-book financial question answering benchmark, spRAG gets 83% of questions correct,…

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