Best Citation Manager for Reviews

The best citation manager for a systematic review is the one that handles your search volume, deduplicates reliably, exports cleanly into your screening tool, and fits your budget and your team, which in practice means Zotero, Mendeley, or EndNote for almost everyone. Zotero is the strongest free, open-source choice; Mendeley is its closest free rival and pairs neatly with its writing add-in; and EndNote is the paid heavyweight that institutions standardise on for its mature deduplication and large-library handling. None of the three runs the blinded screening itself, so the real test for review work is how well each gathers, cleans, and exports the references that a dedicated screening tool then takes over.

The criteria that actually matter for review work

Reference managers are often compared on citation styles and note-taking, but a systematic review stresses a narrower set of capabilities. Five criteria decide the choice: how well the tool deduplicates across overlapping database exports; its capacity for thousands of records and attached files; whether it supports collaboration on a shared library; its cost; and the cleanliness of its export into a screening platform. These map directly onto the early review stages, from the systematic literature search through to the hand-off into title and abstract screening, so judging the tools on them keeps the comparison honest.

Deduplication

Because a review searches several databases that index overlapping journals, the combined export is full of repeats, and the quality of automated deduplication directly shapes how much manual cleanup you face. EndNote is widely regarded as the strongest here: it lets you configure which fields define a duplicate and presents matches for review before removal, giving fine control. Zotero and Mendeley both detect and merge the obvious duplicates well but are more conservative on the awkward near matches. Whichever you pick, no tool catches every near duplicate, so a manual scan is always part of the job; the techniques are the same across tools and are set out in our guide to deduplicating search results.

Capacity, collaboration, and cost

On capacity, EndNote’s desktop application is the most comfortable with very large libraries and many attached full-text files, which matters for a broad review. Zotero and Mendeley both handle large libraries but give each free account a fixed online storage allowance, so a review with thousands of attached files will eventually need paid storage or a workaround. On collaboration, all three offer shared libraries or groups, though the size and number of collaborators can be limited on free tiers. On cost, the gap is stark: Zotero and Mendeley are free to use, with charges only for extra online storage, while EndNote’s full desktop product is paid and most users reach it through an institutional site licence. Exact allowances and prices shift over time, so confirm the current terms before committing rather than relying on a figure you half remember.

Export into a screening tool

For review work the most important output is a clean export. All three managers write the standard interchange formats, including RIS, that screening platforms accept, so each can hand its library to a dedicated tool. The differences are small in normal use, but large libraries with unusual characters can occasionally produce a record a screening tool reads imperfectly, so it is worth spot-checking the first import. This export step is where the reference manager’s job ends and the screening tool’s begins, because only a dedicated platform adds the blinded dual screening and conflict tracking a review needs, as our overview of systematic review screening tools describes.

A recommendation by scenario

There is no single winner; the right tool depends on your situation. A few clear scenarios cover most reviewers.

• Student or unfunded review on a budget: choose Zotero. It is free, open source, and more than capable for a small to mid-sized review; our guide to using Zotero in a review workflow shows the full setup.
• You want a free tool and write heavily in a word processor: Mendeley is a strong fit, with a citation add-in that pairs neatly with the writing stage; see our guide to using Mendeley in a review workflow.
• Large review, institutional licence, demanding deduplication: EndNote is the safest choice, especially where your university already supports it; our guide to using EndNote in a review workflow covers its strengths.

The deeper point is that the reference manager is a means, not the deliverable. What matters is a deduplicated, well-documented library that feeds a rigorous screen, and any of the three can produce that. If you are still planning the project, our guide on how to write a systematic review shows where the reference layer sits among everything else, so you can choose the manager that fits the rest of your method rather than choosing the method around a tool.

A note on accuracy

Reviewers sometimes ask which manager is most accurate, meaning which produces the fewest metadata errors. The honest answer is that accuracy depends more on the source of your records than on the manager: imported database records carry the metadata the database supplied, and all three tools then store and restyle it. The way to keep a library accurate is to import from authoritative database exports rather than scraping individual pages, to deduplicate carefully, and to spot-check that the citation style renders correctly before submission. A manager will faithfully reproduce whatever you feed it, so the discipline of a clean search strategy does more for accuracy than the choice between the three tools ever will.