--- title: "paper-qa vs opendataloader-pdf" type: "comparison" canonical_url: "https://www.graphcanon.com/compare/future-house-paper-qa-vs-opendataloader-project-opendataloader-pdf" tools: ["future-house-paper-qa", "opendataloader-project-opendataloader-pdf"] --- # paper-qa vs opendataloader-pdf *GraphCanon updated Aug 18, 2026* ## Verdict Pick paper-qa if paperQA2 version 5 is a retrieval-augmented generation (RAG) system optimized for extracting information from scientific documents, enhancing user queries with citations; pick opendataloader-pdf if opendataloader-pdf is an open-source PDF parsing library in Java that transforms PDFs into AI-ready data by supporting OCR recognition, bounding box generation, and table extraction. [paper-qa](https://futurehouse.gitbook.io/futurehouse-cookbook) reports 9.0k GitHub stars, 907 forks, and 141 open issues, last pushed Aug 12, 2026. [opendataloader-pdf](https://opendataloader.org) has 29k stars, 2.7k forks, and 82 open issues, last pushed Aug 18, 2026. Figures are from public GitHub metadata via [paper-qa's repository](https://github.com/Future-House/paper-qa) and [opendataloader-pdf's repository](https://github.com/opendataloader-project/opendataloader-pdf). | | [paper-qa](/tools/future-house-paper-qa.md) | [opendataloader-pdf](/tools/opendataloader-project-opendataloader-pdf.md) | | --- | --- | --- | | Tagline | High accuracy RAG for answering questions from scientific documents with citations | PDF Parser for AI-ready data | | Stars | 9,048 | 28,528 | | Forks | 907 | 2,724 | | Open issues | 141 | 82 | | Language | Python | Java | | Adopt for | PaperQA2 version 5 is a retrieval-augmented generation (RAG) system optimized for extracting information from scientific documents, enhancing user queries with citations. | Opendataloader-pdf is an open-source PDF parsing library in Java that transforms PDFs into AI-ready data by supporting OCR recognition, bounding box generation, and table extraction. | | Persona | - | - | | Runtime | - | - | | License | 'Apache-2.0' - Permissive free software license that allows for both non-commercial use and commercial exploitation of the package. | Opendataloader-pdf uses Apache License 2.0, making it a fully permissive license that allows easy integration into commercial projects without copyleft obligations. Prior to version 2.0, the tool was | | Categories | Data & Retrieval, Model Training | Data & Retrieval, Model Training | ## Trust and health _Sourced signals - not a safety guarantee. No winner column._ | | [paper-qa](/tools/future-house-paper-qa.md) | [opendataloader-pdf](/tools/opendataloader-project-opendataloader-pdf.md) | | --- | --- | --- | | Days since push | 5d | 0d | | Open issues (now) | 141 | 82 | | Stars delta | +154 (30d) | +1.1k (30d) | | Open issues delta | 0 (30d) | +8 (30d) | | Full report | [trust report](/tools/future-house-paper-qa/trust.md) | [trust report](/tools/opendataloader-project-opendataloader-pdf/trust.md) | ## Decision facts: paper-qa - **Requirements:** Min 4 GB RAM - **Adopt for:** PaperQA2 version 5 is a retrieval-augmented generation (RAG) system optimized for extracting information from scientific documents, enhancing user queries with citations. - **License detail:** 'Apache-2.0' - Permissive free software license that allows for both non-commercial use and commercial exploitation of the package. ## Decision facts: opendataloader-pdf - **Adopt for:** Opendataloader-pdf is an open-source PDF parsing library in Java that transforms PDFs into AI-ready data by supporting OCR recognition, bounding box generation, and table extraction. - **License detail:** Opendataloader-pdf uses Apache License 2.0, making it a fully permissive license that allows easy integration into commercial projects without copyleft obligations. Prior to version 2.0, the tool was ## Choose when ### Choose paper-qa if… - paper-qa is primarily Python; opendataloader-pdf is Java. - Requirements: Min 4 GB RAM. - Tags unique to paper-qa: rag, science, search. - Your project specifically requires processing and querying scientific documents, as PaperQA2 offers specialized capabilities tuned for this domain. ### Choose opendataloader-pdf if… - opendataloader-pdf is primarily Java; paper-qa is Python. - Tags unique to opendataloader-pdf: a11y, accessibility, bounding-box, document-parsing. - - **You require precise control:** Opendataloader-pdf offers detailed features such as bounding box generation and table extraction, which can be crucial when you need precise data positioning from un ## When NOT to use paper-qa - If your use case does not involve scientific document processing, another RAG system better suited to your specific type of documents (e.g., legal, medical) might be more fitting. - In scenarios where real-time performance is critical and extensive indexing or access to external APIs for large-scale paper handling becomes a bottleneck. ## When NOT to use opendataloader-pdf - - **Non-Java Environment:** Since the tool is primarily developed in Java, it might not be suitable if your primary development environment or application is built around another language. ## Common questions ### What is the difference between paper-qa and opendataloader-pdf? paper-qa: High accuracy RAG for answering questions from scientific documents with citations. opendataloader-pdf: PDF Parser for AI-ready data. See the comparison table for live GitHub stats and shared categories. ### When should I choose paper-qa over opendataloader-pdf? Choose paper-qa over opendataloader-pdf when paper-qa is primarily Python; opendataloader-pdf is Java; Requirements: Min 4 GB RAM; Tags unique to paper-qa: rag, science, search; Your project specifically requires processing and querying scientific documents, as PaperQA2 offers specialized capabilities tuned for this domain. ### When should I choose opendataloader-pdf over paper-qa? Choose opendataloader-pdf over paper-qa when opendataloader-pdf is primarily Java; paper-qa is Python; Tags unique to opendataloader-pdf: a11y, accessibility, bounding-box, document-parsing; - **You require precise control:** Opendataloader-pdf offers detailed features such as bounding box generation and table extraction, which can be crucial when you need precise data positioning from un. ### When should I avoid paper-qa? If your use case does not involve scientific document processing, another RAG system better suited to your specific type of documents (e.g., legal, medical) might be more fitting. In scenarios where real-time performance is critical and extensive indexing or access to external APIs for large-scale paper handling becomes a bottleneck. ### When should I avoid opendataloader-pdf? - **Non-Java Environment:** Since the tool is primarily developed in Java, it might not be suitable if your primary development environment or application is built around another language. ### Is paper-qa or opendataloader-pdf more popular on GitHub? opendataloader-pdf has more GitHub stars (28,528 vs 9,048). Stars measure visibility, not whether either tool fits your constraints. ### Are paper-qa and opendataloader-pdf open source? Yes - both are open-source projects on GitHub (paper-qa: Apache-2.0, opendataloader-pdf: Apache-2.0). ### Where can I find alternatives to paper-qa or opendataloader-pdf? GraphCanon lists graph-backed alternatives at [paper-qa alternatives](/tools/future-house-paper-qa/alternatives) and [opendataloader-pdf alternatives](/tools/opendataloader-project-opendataloader-pdf/alternatives) ([paper-qa markdown twin](/tools/future-house-paper-qa/alternatives.md), [opendataloader-pdf markdown twin](/tools/opendataloader-project-opendataloader-pdf/alternatives.md)), ranked by typed relationship edges rather than popularity votes. ### Is there a machine-readable version of this comparison? Yes. The markdown twin at [this comparison](/compare/future-house-paper-qa-vs-opendataloader-project-opendataloader-pdf.md) mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers. ### Which is better maintained, paper-qa or opendataloader-pdf? paper-qa: Very active. opendataloader-pdf: Very active. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance. ### Where are the full trust reports for paper-qa and opendataloader-pdf? GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: [paper-qa trust report](/tools/future-house-paper-qa/trust); [opendataloader-pdf trust report](/tools/opendataloader-project-opendataloader-pdf/trust). --- **Machine-readable endpoints** - JSON: [`/api/graphcanon/graph?tool=future-house-paper-qa`](/api/graphcanon/graph?tool=future-house-paper-qa) - LLM index: [/llms.txt](/llms.txt) - Full corpus: [/llms-full.txt](/llms-full.txt) _GraphCanon - The knowledge graph for AI development. https://www.graphcanon.com/_