Corpus

What it does

Document research shouldn't cost five figures. Corpus is an open-source research engine that turns mountains of documents into structured answers. Upload hundreds of files, ask dozens of questions, get back a clean spreadsheet—in parallel across your entire corpus. No more reading PDFs one by one or copy-pasting into chatbots. Upload, query, extract. Built this solo because I needed a better way. AGPL licensed, open codebase. Contributors welcome.

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  Consensus2022 · consensus.app · ▲407

  A search engine that finds you answers in scientific papers

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  Open Paper2025 · openpaper.ai · ▲289

  Hi HN! Open Paper allows you to annotate and understand your research papers with an AI copilot. I wanted a paper-reading assistant that let met actually dig into papers in-place while benefiting from AI tooling. When it comes to studying, I'm not a fan of the typical chat interfaces that obfuscate uploaded files and turn them into black box 'content'. Hence, I've implemented a split-pane view. To mitigate the risk of hallucinations, all AI responses come with grounded citations that refer back to the source material in-flow. Some feature highlights: - Actually read your papers in one place…

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  Corpus Insight2025 · corpusinsight.com · ▲29

  The OS for modern work

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  Documind – Open-source AI tool to turn documents into structured data2024 · github.com · ▲169

  Documind is an open-source tool that turns documents into structured data using AI. What it does: - Extracts specific data from PDFs based on your custom schema - Returns clean, structured JSON that's ready to use - Works with just a PDF link + your schema definition Just run npm install documind to get started.

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  corpora.ai2025 · corpora.ai · ▲18

  Corpora.ai is the first AI-powered research engine.

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  Corpus-X2023 · ▲105

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