“EndNote or Zotero” is rarely a question about features. Both collect references from your browser and from library databases, store PDFs, insert citations into Word while you write, and format a bibliography in whatever style a journal demands. Compare them line by line and the lists come out nearly identical.
The difference that matters is structural. EndNote is a commercial product, currently published by Clarivate, that most academics get through an institutional licence. Zotero is free, open-source software from a non-profit, the Corporation for Digital Scholarship. Everything downstream of that — support, cost, portability, who you can work with — is harder to reverse later than any feature on either list.
Four questions settle it.
1. Is EndNote licensed for you, and who fixes it when it breaks
For most people the price question is not theirs to answer. Many universities carry a campus-wide EndNote licence, which makes it free at the point of use and usually brings a support contract with it — a vendor your library can escalate to when nobody local can fix your problem. That escalation path is the part Zotero has no equivalent of; library-run Zotero training and help-desk support are common enough, but behind them nobody is under contract. If you would rather not debug a citation plugin the week before a deadline, that matters more than any feature table.
But the entitlement belongs to the institution, not to you. It ends, or changes shape, when your affiliation does — you finish the PhD, move labs, leave academia, or a renewal decision goes the other way. Those things arrive mid-project.
Zotero’s answer is the same in all of them: free, identical at home and at the next institution, unaffected by your leaving. Its support is documentation and an active user forum — usually good, sometimes slow, and nobody is obliged to answer you.
So ask your librarian two things: is EndNote licensed here, and what happens to my access when my affiliation ends. The second answer varies by institution.
2. What it costs to leave
Zotero keeps your library in a database on your own disk, and the code that reads it is open source. Everything exports — RIS, BibTeX, CSL-JSON — and its styles are CSL, an open format shared with other tools, so those are portable too.
EndNote’s library is a proprietary format: a library file plus a data folder that travels with it. References export well enough through RIS or EndNote’s own XML; what travels badly is what hangs off them — attachments, some notes, and unusual item types that map imperfectly onto the other tool’s fields.
But the expensive part of switching is not the library. It is the manuscripts you have already started. A Word document written with EndNote’s Cite While You Write carries EndNote field codes; one written with Zotero’s add-in carries Zotero’s. They do not convert. Switching mid-manuscript means finishing that manuscript in the old tool, or unlinking every citation and reinserting it.
Which is the argument for settling this now: trying both costs an afternoon at the start of a project, and a week of relinking in month eight.
3. What you write in
Word. Both insert citations as you write, competently. EndNote is the incumbent, and many labs’ shared conventions are built around it.
Journal styles. Both ship very large style collections — EndNote’s own output styles, and the community-maintained CSL repository Zotero draws on, which is the larger of the two by count. EndNote’s edge is not breadth but supply: many publishers distribute an EndNote style file for their own journals, so an obscure requirement is often one download away. When a CSL style is missing, CSL is text a person can edit. The question is which one already has your target journal.
Google Docs and LibreOffice. Both reach past Word now. Zotero has plugins for Word, LibreOffice and Google Docs, on Windows, macOS and Linux alike. EndNote has a Cite While You Write add-on for Google Docs too, from version 21 onward — it needs your library synced to an EndNote Web account — alongside Word Online, Apple Pages, OpenOffice Writer and LibreOffice, though its LibreOffice route is Windows-only and needs a 32-bit LibreOffice. What still differs is what happens when a document moves between them: Zotero has a “switch word processors” step that carries live citations between Google Docs, Word and LibreOffice, while Clarivate’s own guidance is that a Word document’s EndNote encoding is stripped when it goes through Google Docs. If your co-authors live in Google Docs and the manuscript has to come back to Word, that gap can decide it.
LaTeX. Not a contest. Zotero with the Better BibTeX plugin gives you stable,
human-readable citation keys and a .bib file kept in sync with your library. EndNote
can export BibTeX, but that is an export, not a workflow.
4. Who you collaborate with
An EndNote shared library requires the other person to have EndNote. Inside one licensed department that is invisible. Across institutions, or with a co-author whose university standardised on something else, it turns into “can you buy a licence” — which is where a lot of shared-library plans quietly die.
A Zotero group library requires a free account and nothing else. The constraint there is storage rather than access: files in a private group are charged against the group owner’s quota, so a lab library full of PDFs eventually needs someone on a paid plan.
The practical rule: the tool that wins is the one your external collaborators can install without asking permission.
The short version
| If… | Choose |
|---|---|
| Your institution licenses it, you are staying, and you want a support desk | EndNote |
| Your journals ship EndNote styles and you write in Word | EndNote |
| You write in LaTeX | Zotero + Better BibTeX |
| Your co-authors are outside your institution, or a draft has to move between Google Docs and Word | Zotero |
| You want the library to survive whatever happens to your affiliation | Zotero |
The job neither of them is built for
Both are libraries, and both are good ones. They hold what you have already found and turn it into a correctly formatted bibliography. What they have in common is near-silence about the step before that: when you have one key paper and need to know which work it rests on and who has since argued with it, neither gives you much. EndNote links a reference out to Web of Science’s related records and citing articles, but only if your institution subscribes, and it is a link out rather than a graph you can follow. For that you go back to a search box.
Citation-graph tools exist for that step. Litlas is one: a search across several open bibliographic sources at once (OpenAlex, Crossref, arXiv, PubMed and DBLP among them), a graph view that expands a paper’s references on one side and its citations on the other, and a library where what you keep carries your own notes. BibTeX and RIS go both ways, so it sits next to EndNote or Zotero without a migration, and it formats citations in APA, Chicago (author-date), IEEE, MLA and Vancouver.
What it is not, because in a comparison the absences matter more than the features:
- No Word plugin. If “cite while I write in Word” is a requirement, EndNote and Zotero do it and Litlas does not; its editors (markdown, LaTeX compiled in the browser, rich text) live in the browser.
- No site licence. Nothing here for your university to have already bought, and no help desk trained on it.
- No offline desktop client. EndNote and Zotero are desktop applications that work on a plane. Litlas runs in the browser, and its Chrome extension installs from a downloaded ZIP rather than a browser store.
- No systematic-review tooling. No screening workflow, no PRISMA diagram.
- The AI button is a hand-off, not a summariser. It opens the paper in Gemini, ChatGPT, Claude or Gemini Notebook; Litlas runs no model of its own.
- The free plan needs no card, but it caps daily searches, graph views and hand-offs, and caps how many papers and boards you can keep.
Deciding in an afternoon
- Email your librarian the two questions from section 1. That answers most of it.
- Look at what you write in: LaTeX points at Zotero, and so does a draft that has to move between Google Docs and Word; Word plus publisher-supplied EndNote styles points at EndNote.
- Look at who your co-authors are. External collaborators decide this more often than your own preference.
- Then test: import the same twenty references into each and write a paragraph with live citations. The one that annoys you less is the answer.
- Ask separately whether your problem is holding papers or finding them. Neither tool addresses the second.