paperclub is Bibby AI’s collaborative annotation tool for research papers. Upload a PDF or paste an arXiv link, highlight passages, leave comments in the margins, and see annotations from other readers. It was previously called PaperFace and PaperSpace.

Can I annotate research papers for free?

Yes. paperclub is free to start. Sign in with Bibby, open the shared library, and annotate papers in your browser — nothing to install.

How is paperclub different from Hypothesis or Perusall?

paperclub is built for research PDFs and journal clubs: arXiv links, highlight consensus across readers, moderated margin comments, and a shared library next to Bibby’s citation search and paper review tools.

Was this product called PaperFace or PaperSpace?

Yes. PaperSpace became PaperFace, and PaperFace is now paperclub. Links to /products/PaperFace and /paper-space still work.

Annotate Research Papers Together — paperclub | Bibby AI

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