RAGFlow
ragflow.io
An open-source RAG engine with deep document understanding — extracts structured content from PDFs, presentations, spreadsheets, and images using OCR and layout analysis before chunking.
Why it is useful
Solves the hardest part of document RAG: most tools chunk text naively and lose table structure, headers, and visual layout that are critical for accurate retrieval. RAGFlow uses OCR and document layout analysis to preserve this structure, which dramatically improves answer quality for complex documents. Self-hostable alternative to commercial document AI services.
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