Reviewed by Alexis Morain · Updated July 14, 2026
A solid, free reference manager backed by Elsevier, a good choice for those in its ecosystem rather than open source.
Mendeley is a reference management tool and academic network published by Elsevier. It lets you organize your library of publications, annotate PDFs, generate citations and bibliographies, and discover new publications, with a social dimension of sharing between researchers.
Mendeley is used to manage research documentation: import and organize references, read and annotate PDFs, insert citations into a word processor, and follow developments in your field. Backed by Elsevier, it integrates with the scientific publishing ecosystem, against an open-source competitor like Zotero.
Against Zotero, open source and independent, Mendeley is owned by Elsevier and fits into its ecosystem. Basic features are similar; the choice depends on preferring a free tool (Zotero) or integration with the Elsevier world (Mendeley).
Mendeley is free for reference management and citation generation, with free cloud storage. Beyond that, paid storage extensions are offered to sync a larger library. Most uses fit within the free version.
Reference management
Organized publication library
PDF annotation
Built-in reading and annotation
Citations
Standards-based bibliographies
Discovery
Suggestions and academic network
Mendeley is free for reference management, PDF annotation and citation and bibliography generation, with free cloud storage. Beyond that capacity, paid storage extensions let you sync a larger library. As with many reference managers, most uses fit within the free version, with payment only for storage.
Free plan / trial
Free with free cloud storage; paid storage extensions beyond.
Mendeley
Reference management · Citations and bibliographies · Free cloud storage
Free
Extended storage
Higher capacity · Large libraries · Optional
Paid subscription
Pricing verified on July 14, 2026
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