Reference managers compared

A reference manager collects the sources you read, stores PDFs and notes, and inserts correctly formatted citations and a bibliography into your text. For most students, Zotero is the safest default because it is free, open source and runs on all major platforms. Citavi, Mendeley and EndNote are good alternatives in specific situations, especially when your university licenses and supports them.

What a reference manager does for you

• Collects references from databases, library catalogues and websites with one click, usually through a browser extension.
• Stores and annotates PDFs so you can find a quote again months later.
• Formats citations in thousands of styles, including APA, Harvard and IEEE, and updates the bibliography automatically.
• Supports group work through shared libraries.
• Keeps your data portable through standard export formats.

If you are just starting a thesis, set one up before your literature search, not after. Rebuilding citations by hand is one of the most avoidable time sinks in academic writing.

The four tools at a glance

	Zotero	Citavi	Mendeley	EndNote
Provider	Non-profit, open source	Lumivero	Elsevier	Clarivate
Cost model	Free; paid cloud storage beyond the free quota	Paid; often via campus licence	Free; storage limits apply	Paid licence; often via institution
Desktop platforms	Windows, macOS, Linux	Windows (Citavi Web in the browser)	Windows, macOS, Linux	Windows, macOS
Word processor plug-ins	Word, LibreOffice, Google Docs	Word	Word	Word (and others, depending on version)
Citation styles	CSL, very large library	Own style format, large library	CSL	Own style format, large library
Knowledge organisation	Notes, tags, annotations	Strong: quotes, ideas, task planning	Notes, annotations	Notes, annotations
LaTeX	Very good (Better BibTeX)	Possible	Possible	Possible

Status October 2026, based on provider documentation. Features and prices change; check the provider’s website before you decide.

Zotero

Zotero is free, open source and developed by a non-profit organisation. It runs on Windows, macOS and Linux, captures sources reliably from most databases and has an active plug-in ecosystem. According to the Zotero website, the free account includes 300 MB of cloud storage for attachments, with paid tiers above that; reference data itself syncs without that limit. Group libraries are free. Zotero uses the Citation Style Language (CSL), which gives you access to a very large collection of styles.

Citavi

Citavi combines reference management with knowledge organisation: you can save quotes, link them to ideas and outline chapters inside the tool. Many universities in Germany, Austria and Switzerland provide campus licences. The full desktop application is Windows-only; Citavi Web runs in the browser and is licensed separately. If you work on a Mac or Linux, check whether Citavi Web covers what you need.

Mendeley

Mendeley is owned by Elsevier. The current desktop app, Mendeley Reference Manager, replaced the older Mendeley Desktop, which is no longer offered for new installation. The free account includes 2 GB of storage according to the provider. Mendeley is easy to start with, but some users are cautious about storing their research library with a large publisher. Our Zotero vs Mendeley comparison goes into detail.

EndNote

EndNote, from Clarivate, is a long-established paid tool, common in medicine and the life sciences and often licensed by institutions. It handles very large libraries and offers many output styles. If your institution does not provide it, the licence cost is a real consideration for students.

How to choose

1. Ask your library which tools it licenses and supports with training. Support matters when something breaks close to a deadline.
2. Check your platform. On macOS or Linux, Citavi’s desktop version is out.
3. Check your writing tool. Word, LibreOffice, Google Docs and LaTeX are supported to different degrees.
4. Think about collaboration. If co-authors already use a tool, matching it saves friction.
5. Think about the long term. Choose a tool whose data you can export, especially if a campus licence ends after graduation.

Note: when you leave university, a campus licence may expire. Export your library in RIS or BibTeX format, together with your PDFs, before your account is closed.

Data protection

Your library reveals what you are working on. Check where the provider stores data, whether syncing is optional and what happens to uploaded PDFs. Zotero lets you work entirely locally. Cloud-first tools are convenient, but read their privacy policy, especially for unpublished or sensitive projects.

Setting up well from day one

• Install the desktop app and the browser connector.
• Install the word processor plug-in and test it with one citation.
• Choose the citation style your department requires; our guide to citation styles helps.
• Create a folder or collection structure that mirrors your chapters.
• Check imported metadata, because databases sometimes deliver incomplete records.
• Set up a backup or sync before your library grows.

More comparisons are in the tools section.