AllCitations vs Mendeley: Styles, Storage, and Word

Mendeley is a reference manager with an account attached. AllCitations is a citation generator with nothing attached. That is the whole of the AllCitations vs Mendeley decision, and you can usually make it by answering one question: are you building a library you will still be using in two years, or do you need six references formatted before a deadline? Mendeley is built for the first job and asks for a signup, an install and some setup before it does anything. A generator does the second job in the time it takes to paste a DOI.

Every claim below about Mendeley comes from mendeley.com and Elsevier's Mendeley Support Center, fetched on 17 September 2026. Claims about AllCitations come from the app's own style list and the code that produces its output. Where a page could not be fetched, the claim is left out.

One note on research for this post, since it affects what you are reading. Reddit's discussion of Mendeley is genuinely hard to harvest, because "reference" pulls in job references and employment checks far more than reference managers. So this comparison is built from first-party documentation, and where a number is absent from Mendeley's own pages, it is absent here too.

Quick comparison

What Mendeley does well

Mendeley is a real reference manager and it is free at the tier most students will ever touch. Its home page calls it "the free all-in-one reference manager" and says it "helps you stay organized, do more in less time, and bring ease to your research workflow." The free account includes "2GB of free storage," which covers the PDFs you attach. Reference records are tiny by comparison.

The library is the reason to install it. Mendeley holds your sources, the PDFs, and the annotations you make on them, and it keeps them across the devices you sign into. You can "instantly expand your Mendeley library by importing PDFs or entire folders," drag and drop documents into it, and set up Watched Folders so that anything you save into a designated folder on your desktop gets pulled in automatically. That last feature is quietly one of the best things about it. If your habit is to download papers to ~/Downloads and lose them, a watched folder turns that habit into a filing system without asking you to change anything.

Mendeley Cite is the feature a generator structurally cannot match. It is "a citation add-in for Microsoft Word" that lets you "seamlessly insert references and bibliographies into your document." Change the style in week nine of a twelve-week project and the document reformats. Fix an author's name once in your library and every citation of that source updates. The add-in also does something the old plugin could not: you can "cite without having Mendeley Desktop open or even installed, minimizing potential performance loss." If you are writing a thesis, that single feature pays back the setup cost inside a week.

Its Word support is broader than people assume. Elsevier's support pages list Mendeley Cite for Word 2016, Word 2019 and Office 365 on both Windows and macOS, for Microsoft Word for iPad, and for Word Online. Web-based Word is a genuinely useful inclusion, because a lot of students are working on a borrowed or locked-down machine.

The Web Importer browser extension will "import papers, web pages and other documents directly into your reference library from search engines and academic databases," and it runs in Chrome, Firefox, Safari and Edge. Private groups give you "shared libraries where colleagues, course-mates or co-authors can add references, annotate PDFs," which matters for a lab or a co-authored paper.

Style coverage is deep, and the architecture is the reason. Mendeley's support documentation says it "supports many citation styles, from the widely used APA and MLA formats to more than 10 variations of the Chicago Manual of Style," and that "styles are fetched from the CSL citation styles repository." That repository is the community-maintained CSL catalogue on GitHub, which runs to thousands of styles. If your target journal has a house style, it is probably in there.

If a reference manager is what you actually need, our guide to setting up Zotero covers the same ground for the main open-source alternative, and the AllCitations vs Zotero comparison is the closer fight on features.

Where Mendeley falls short

Every friction point below comes from Mendeley's own documentation.

An account is required, and it is an Elsevier account. The support center is direct: an account is necessary to use Mendeley Reference Manager, and you create one "for free" at mendeley.com. If you already have credentials for ScienceDirect or Scopus, those work, because they are the same identity system. Mendeley is owned by Elsevier. For some researchers that is a non-issue and for others it is the entire reason they use something else, and it is worth knowing before you reach the signup screen.

There are two Mendeleys, and the older one is frozen. Mendeley Desktop and Mendeley Reference Manager are different applications. Desktop sits at version 1.19.8, and Elsevier's support page states plainly that "there will be no further software updates" and that "its compatibility with future operating systems cannot be guaranteed." The long-term plan is on the record too: eventually Elsevier will "begin the process of ceasing the availability of Mendeley Desktop to download and stopping all sign-ins," with notice beforehand.

The history here is worth a sentence, because it is why people still ask whether Mendeley is dying. Elsevier previously signalled that Desktop sign-ins would stop, then reversed that in a blog post dated 9 July 2025 titled "Mendeley Desktop is Here to Stay," which committed to "essential maintenance support" including critical security fixes while confirming no new feature development. So Desktop is supported but static, Reference Manager is the active product, and the thing that alarmed everyone has been walked back. The feature gap between the two is also the most common substantive complaint about Mendeley on review sites: users comparing the new application against the old one and finding things missing.

Word is the word processor. Mendeley Cite is a Word add-in. Elsevier's supported-platforms page lists Word on Windows, macOS, iPad and the web. Google Docs and LibreOffice are not on that list. If your department writes in Google Docs, this is a hard constraint, and it is the single most likely reason for a Mendeley user to start looking at alternatives.

macOS users should check the version line. Reference Manager supports "macOS 10.15 (Catalina) and above," but version 2.144.0 and later require macOS 12 or newer. On an older Mac you can be in the position of running a version that no longer updates.

Setup is not free in time. Create an account, install the desktop app, add the browser extension, add the Word add-in, sync. That is perhaps twenty minutes when nothing goes wrong. Across a dissertation it is nothing. For one annotated bibliography due tomorrow morning, it is the entire task.

2GB is a real ceiling for a PDF hoarder. Reference records are small, but a few hundred scanned PDFs are not. We did not fetch a paid storage page this run, so there is no price quoted here.

The part both tools share: CSL

Most comparison articles frame this as a formatting-quality contest, and that framing is wrong. Mendeley's support documentation says its citation output is powered by CSL and citeproc-js, with styles pulled from the CSL repository. AllCitations renders through a citeproc engine against CSL style files as well. Two tools running the same standard against the same style definition produce the same reference.

So the honest comparison is not about which one formats APA "better." It is about catalogue, workflow, and what happens to the citation after it is generated. Mendeley reaches a far larger style catalogue and puts the result inside your Word document where it stays live. A generator gives you a finished reference to copy, in a smaller and more deliberately chosen catalogue, with no account and no install.

The place the two genuinely differ on correctness is editions, and that is a catalogue problem. "Chicago" is not one style, and Mendeley's own documentation acknowledges this when it counts "more than 10 variations of the Chicago Manual of Style." Working out which CSL file in a repository of thousands implements the 18th edition, and which the 17th, is a research task, and it is one students routinely get wrong. Either way, check the rendered output against the edition you were told to use. That is the same advice as in how to use an APA 7 citation generator.

What AllCitations does well, and where it falls short

Where it wins: you need a correct citation in a specific style and edition in the next few minutes. Thirty styles are available immediately, free, with no signup and no paid tier. The catalogue is narrower than a community repository on purpose, and curated in a particular direction.

Two things follow from that. The first is edition pairs. The app carries APA 6 and APA 7, MLA 8 and MLA 9, Chicago 17 and Chicago 18 in both notes-bibliography and author-date, AMA 10 and AMA 11, Turabian in both notes and author-date, and both the citation-sequence and author-date variants of CSE and Vancouver. You pick the edition your instructor named from a labelled list, and you can render the same source in two editions side by side to see exactly what changed.

The second is hard-to-find styles. The list leans toward the ones students struggle to locate elsewhere: Bluebook, OSCOLA and AGLC for law, ACS for chemistry, ASM for microbiology, CSE for the life sciences, ASA for sociology, APSA for political science, AIAA for aerospace, Nature, and Deutsche Zitierweise alongside three Harvard variants.

Export and import both work, which matters for this specific comparison. A bibliography goes out as BibTeX, RIS or a Word document, and BibTeX and RIS come back in. That makes a generator a reasonable front door to a reference manager: format the awkward source, export RIS, import it, carry on.

Now the honest half.

It is not a reference manager and is not trying to become one. No library. No PDF storage. No annotation. No tags. No sync. No groups. No Word add-in, which means no citations that update when you change your mind about the style in week nine. Every one of those is a reason to install Mendeley instead, and none of them is on a roadmap that would date this post.

Nothing is saved. No account means nothing stored on our side. Export before you close the tab.

Thirty styles is thirty styles. Mendeley reaches the full CSL repository and we do not. If your target journal has its own house style, that is a decisive point against us.

A generator is still a generator. Metadata comes from publishers and publishers get it wrong. A title in the wrong case, a missing issue number, a DOI resolving to the preprint rather than the version of record: none of those are fixed by any tool's formatting step, in either product. Check the output. If the source is one you cannot pin down at all, how to cite a source you can't find covers the fallbacks.

Which one should you use?

Use Mendeley when the bibliography outlives the semester. It is the right call for PDFs and annotations kept in one searchable place, for citations that update inside Word when the style changes, for sources shared with co-authors, for a style that exists only in the CSL repository, or for anyone whose work already runs on an Elsevier login. The setup cost is real, and anything longer than a term paper repays it.

Use AllCitations when you need a named edition rather than a style name. It also suits the law and science styles that general tools handle badly, output with no account and no install, and a BibTeX or RIS file to hand a reference manager later. With a handful of sources and no appetite for acquiring a system tonight, it is simply the faster route.

Look at Zotero when you want a library, write in Google Docs or LibreOffice, and would prefer your references were held by a nonprofit. That is the honest recommendation for a specific and fairly common set of preferences, and the full comparison covers it.

Most people end up with a combination, and it is worth saying plainly: a reference manager as the library, and a generator for the one awkward source at 11pm that the importer refused to capture.