Paperpile vs Qiqqa

Paperpile is a reference manager for collecting, organizing and writing with research papers. It can import references, extract PDF metadata, organize libraries with folders and labels, detect duplicates, repair metadata and search collections. Plans include unlimited storage for research PDFs. Citation support includes more than 10,000 styles, with plugins for Google Docs and Microsoft Word. Shared folders and libraries, access permissions, and collaborative PDF annotations and citations support group work. The Android and iOS apps sync with the web library and support highlights, notes and drawn annotations. Users can also search 150 million articles across sources including PubMed, arXiv and CrossRef, and save PDFs with one tap. Integrations include Google Drive sync, Overleaf, browser extensions, and academic databases and publishers. Regular costs $4.15 a month and Expert costs $5.75 a month, with all plans billed annually; a 30-day trial is available. New sign-ups are currently available on Chrome, while Safari and Firefox access is in beta.

Qiqqa is a research and reference manager for finding, reading, and annotating PDFs and turning research into bibliographies. Its library tools include document previews, duplicate detection, automatic PDF import, OCR, and full-text search across multiple libraries. It imports references from Mendeley, Zotero, EndNote, JabRef, and other BibTeX-exporting programs. Expedition groups library contents into themes, while citation, author, keyword, and related-document tools help locate papers. The PDF viewer supports highlights, annotations, and free-form drawing, with reports that can collect abstracts, notes, and marked passages. Qiqqa InCite supports Microsoft Word citations and bibliographies using community-contributed styles, and can suggest papers from a library while writing. Users can share libraries, assign roles, and collaborate on annotations and metadata. A free Android companion app supports offline viewing, annotation, and highlighting. The open-source repository describes a Windows tool and says commercial Web Library cloud sync ended in 2021. Premium costs $6.67 a month; Premium+ costs $41.67 a month.