The email tends to arrive in September: the department did not renew the site licence, or your student status ends in six weeks, and EndNote stops accepting the key it accepted for years. The hard part is not finding another reference manager — it is the library file holding several hundred PDFs and a decade of citations.

EndNote’s own pricing explains the frequency: a full licence is $275 one-time, a student licence $150, an upgrade $125 (endnote.com/buy, checked October 2026). Reasonable for a funded lab, painful for anyone paying personally — which is why most people leave EndNote over cost and ownership, not features.

Below is the order of decisions that actually matters, then picks by situation.

The four differences that decide this

Who still has a licence next year. The first question, and the one people skip. A university site licence covers you while you are enrolled or employed; it does not follow you to a new job, and alumni access disappears quietly. Zotero inverts the model: free open-source software, and you pay only for synced file storage — 300 MB free, then $20/year for 2 GB, $60 for 6 GB, $120 unlimited (zotero.org/storage). Mendeley gives 2 GB free and sells Premium Plus at $4.99/month or $55/year, Pro at $9.99/month or $110/year. EndNote’s one-time purchase is genuinely yours forever, its strongest argument for subscription sceptics.

How PDFs get in, and how you find them again. All four capture a PDF from a publisher page in one click; the difference shows up two years later when you are hunting for a sentence you remember. Zotero 10, released this year, rebuilt full-text search so quoted phrases return almost instantly, made search accent-insensitive, and added a Reading Mode that reflows two-column PDFs into text you can still annotate (zotero.org/blog) — the most substantive update any of these shipped in 2026. Mendeley’s reader is pleasant and its AI answers questions across your library, but the free tier caps storage at 2 GB. Paperpile keeps PDFs in Google Drive, so your ceiling is your Drive quota — convenient if you pay for Google One, awkward if your institution blocks Drive sync.

The Word problem. Citations are only useful if they land in the document your co-authors use. EndNote’s Cite While You Write remains the most predictable plugin for odd journal templates, which is why departments publishing in niche journals keep paying. Zotero installs plugins for Word, Google Docs and LibreOffice and draws on the CSL style repository, covering every common style. Paperpile is the outlier: built around Google Docs, and a lab writing in Word will find it the wrong shape. Mendeley’s Word plugin still works but has felt like maintenance since the old desktop app was retired in 2022.

Whether other people can use your library. Zotero group libraries are free and share citations, PDFs and annotations; storage comes from the group owner’s quota. Paperpile puts shared folders on paid plans — fair for a lab, annoying for a two-person paper. EndNote’s sharing runs through EndNote Web and institutional accounts and has never been its strong point. Mendeley was the social reference manager a decade ago; group work is no longer where its effort goes.

Joplin, the open-source notes app that pairs well with a reference manager for reading notes

Joplin (image: Joplin project). Citation managers store the paper; the notes about why it matters often end up somewhere else — worth deciding where before you migrate.

Picking by situation

One thesis, one year, no budget. Install Zotero and stop reading comparisons. The free 300 MB holds roughly 60 to 100 journal PDFs, depending on scans — enough for a taught master’s dissertation if you are selective. Pair it with Joplin for reading notes and use the free Word plugin for the bibliography. If space runs out mid-thesis, $20 buys 2 GB — less than an EndNote student licence, and it renews only if you want it to.

A doctorate, or a project that will outlive your institution. Pay the $20 a year without agonising, and add JabRef if you write in LaTeX. JabRef has been free and open source since 2003, stores everything in plain BibTeX files, and has no vendor that can discontinue it — the actual risk you are hedging. Keep an exported copy of the library in a cloud folder once a semester. If your supervisor or target journal demands EndNote-specific output, keep one licensed copy for final formatting and do the daily work in Zotero; the export path between them is good enough.

A lab, a writing group, or a shared chapter. Zotero group libraries are the default: free, and annotations travel, so a co-author can see which paragraph you flagged. If everyone writes in Google Docs and the institution pays for Workspace, Paperpile is smoother — 30-day trial, then about $4.15/month billed annually on the entry plan, roughly $5.75 with shared folders and full-text PDF search (paperpile.com/pricing, October 2026). Confirm nobody writes in Word before committing the group.

Your situationStart withWhy
One dissertation, tight budgetZotero (free tier)No licence to lose, Word plugin included
Long research career, LaTeX nearbyZotero + $20/yr storage, JabRef for .bibPortable files, no vendor can retire them
Lab sharing PDFs and annotationsZotero group libraryFree groups, storage billed to the owner
Google Workspace lab writing in DocsPaperpileNative Docs citations, shared folders on paid plans
Journal template only EndNote satisfiesKeep EndNote, work in ZoteroExport before final formatting, not after

Where the switch goes wrong

First trap: treating free storage as free sync. Zotero’s 300 MB goes fast if you keep publisher PDFs rather than linking to them, and people discover this three weeks into a literature review. Decide the storage plan before you import.

Second: importing badly. Dragging an .enl file will fail; EndNote must export to XML or RIS first, and a compressed .enlx has to be unpacked. Custom fields, smart groups and some annotation links do not survive. Import into a test library and check twenty references — one with a corporate author, one with a DOI-only record — before trusting the migration.

Third: cancelling too early. Keep the EndNote licence active until one full document has been formatted end to end in the new tool and your co-authors have opened it. The failure mode is a submitted chapter with broken field codes and no way back.

Questions people actually ask

Can Zotero open my EndNote library directly? Not directly. Export from EndNote to XML (preferred, keeps more fields) or RIS, then import that file into Zotero. Unpack .enlx archives first.

Is Mendeley still a reasonable choice in 2026? Yes if you want 2 GB free, a clean reader and AI answers about your own library, and do not mind paying for the better features. It is a weaker bet for collaboration, and for anyone who wants a library to outlive a company’s product strategy.

Does Zotero work with Word, or only Google Docs? Both, plus LibreOffice. Install the Zotero Connector and the word processor plugin appears; citations stay as fields you can refresh when the style changes.

Do I have to pay Zotero anything? No. The application is free and self-hosting sync is possible; payment is only for Zotero’s own file storage and for the optional extra features tied to it.

What to do this week

Export the EndNote library to XML today, even undecided. Then install Zotero, import into a test library, and format one real document — a chapter, a grant section, anything with fifteen citations — before the licence lapses. If it comes out clean, the decision is made for you. If you are also replacing analysis software that left with the campus licence, the same logic applies in our SPSS alternatives guide; for the writing stage, these research writing tools are worth setting up next.

Pricing and feature details checked against official sites in October 2026. No tool in this article was tested hands-on by us; ratings are omitted deliberately.