Lacuna Research

Save any page to your Lacuna reading list in one click, and ask Althea questions across the papers in a list.

Save any page you are reading to your Lacuna reading list with one click: arXiv papers as papers, everything else as a link. Keep named lists, open a list in Althea and ask a question across the collection: compare methods, find shared limitations, or work out what to read next. The extension retrieves available arXiv HTML full text and attaches it, together with the paper metadata and source links, to Althea’s composer. You review the sources, type your question, and press Send. Missing full texts are marked, and you choose whether to continue with the available sources. You can also copy BibTeX citations and Markdown links, filter saved items, and search machine learning research in Lacuna from the popup or right-click menu. Reading lists are kept in your Lacuna account, so saving requires signing in to Lacuna; the same account works for Althea. Copying citations requires no account. Asking Althea is subject to the service’s access and usage limits; questions can include up to 20 papers at a time. Full-text retrieval supports arXiv HTML where available. Other pages are saved as links and their full text is not retrieved. PDFs are not read. Figures appear as captions and available alternative text. Check citation metadata and AI answers against the original papers. The extension has no analytics and does not collect browsing history. It sends a page address to Lacuna only when you click to save it, reads page metadata when you open it, retrieves arXiv text when you choose Ask, and sends the prepared attachment to Althea when you press Send. See the privacy policy for details. Available in English, German, French, Spanish, Italian, Portuguese (Portugal), Dutch and Polish. By Tiptree Systems. Not affiliated with arXiv or Google.