Paperpile

Paperpile is particularly appealing if your writing workflow is centered on Google Docs and you want reference collection, PDF organization, and bibliography formatting to work together. Its browser importer can make saving articles straightforward, while shared libraries and Google Docs integration can support collaborative writing.

It is a paid service, and its close integration with Google's ecosystem may be less useful if you mainly write in another environment. Imported metadata still needs review, and access, storage, and collaboration features can depend on the current plan.

Before adopting it for a large project, test importing a representative set of references and exporting your library. Check the requested account permissions, verify the journal's citation style in the final document, and make sure collaborators can use the workflow you choose.