What Overleaf is
Overleaf is a browser-based LaTeX editor. You write in a text pane, the PDF compiles on Overleaf’s servers and appears beside it, and collaborators open the same project through a link and edit simultaneously.
The reason it dominates academic LaTeX is that it removed the two barriers that kept most co-authors out. Installing a TeX distribution and getting a build chain working is genuinely a barrier for people whose contribution to the paper is the clinical expertise rather than the typesetting, and emailing .tex files between four authors is how sections get lost. Overleaf solves both by putting the whole toolchain on a server and the whole project behind one URL. Everything you gain and everything you give up follows from that: nothing to install, and nothing that works offline.
Why researchers use it
- Collaboration that actually happens — a link, simultaneous editing, and comment threads, which is the difference between co-authors contributing and co-authors sending you tracked-changes Word files.
- Nothing to install — the co-author who has never opened a terminal can still fix their own paragraph.
- Thousands of journal and thesis templates — most major publishers maintain official Overleaf templates, and starting from one prevents an argument about margins later.
- Direct journal submission — several publishers accept submission straight from an Overleaf project.
- Full history and version comparison — see what changed and when, without anyone maintaining it deliberately.
Where it fits in a research workflow
Overleaf is where the manuscript lives when more than one person writes it. Upstream is a .bib file — Overleaf links directly to a Zotero or Mendeley library, which is the integration most people underuse — and figures produced elsewhere in matplotlib, Inkscape, or BioRender. Downstream is a submitted PDF, or a .docx via Pandoc for the supervisor who insists on commenting in Word.
The important architectural point is that Overleaf projects can sync with Git, which is the escape hatch from every limitation below. That lets you write locally in TeXstudio or VS Code while co-authors work in the browser, with Git as the meeting point — the offline LaTeX setup is the other half of that arrangement. Git sync is a paid feature, which is the single most consequential thing to know when choosing a plan.
Getting started
Fifteen minutes, and start from a template.
- Check whether your institution has a site licence before creating a personal account. Many universities provide Overleaf’s paid tier to all staff and students, and paying personally when that exists is the standard avoidable expense here.
- Start a project from your target journal’s official template rather than a blank document. Formatting arguments avoided at the beginning are formatting arguments you never have.
- Link your reference manager — Overleaf pulls a
.bibfrom Zotero or Mendeley and keeps it current, which removes the manual export step most people never automate. - The step people skip: turn on Git or Dropbox sync if your plan has it, and pull a local copy periodically. A cloud-only manuscript with no local copy is one account problem away from a very bad week.
Overleaf vs the alternatives
| Alternative | Does it better | Pick it if |
|---|---|---|
| TeXstudio | Offline work, unlimited compile time, no project size limits | You write alone and locally |
| VS Code | LaTeX plus code plus notes in one editor, with real Git | You want one tool and already use it |
| Typst | A far better writing experience, where the venue permits it | You control the output format |
| Quarto | Executing analysis code inside the manuscript | Your figures and numbers come from code |
Overleaf wins on collaboration and loses on everything requiring offline work or scale. For a solo thesis, a local editor is genuinely better.
Cost, licensing, and your data
The free tier is real and usable for solo work or a small collaboration: unlimited private projects, but with a compile timeout measured in minutes, a single collaborator per project, and no Git or Dropbox sync. Paid plans lift those limits. Institutional site licences are common — check before subscribing.
Two things deserve attention. First, your manuscript lives on Overleaf’s servers, which for most unpublished papers is unremarkable but is worth a moment’s thought for embargoed results, commercially sensitive work, or anything under a data-processing agreement. Second, and more practically: the free tier’s lack of Git sync means your only copy is in a browser. Download or sync a local copy of anything you would be devastated to lose, on any plan. A .tex project is a few megabytes; there is no defensible version of having exactly one copy of a thesis.
The honest review
Strengths. Overleaf made LaTeX collaborative, and in doing so made LaTeX viable for the large multi-author papers that dominate most fields. The template library and direct submission paths remove genuine friction at exactly the points where deadlines bite. For a five-author paper across three institutions, it is not the best option — it is effectively the only one that works without someone becoming the build engineer.
Limitations. The free tier’s one-collaborator limit is restrictive precisely where collaboration is the product, and the compile timeout bites on exactly the documents that matter — long theses with many figures. It requires a connection, so writing on a plane or a bad hotel network is not an option. Large projects with many files and custom fonts get sluggish. Git sync, the feature that makes serious version control and local editing possible, is paid. And a cloud-only manuscript is a dependency on a company’s continued operation and on your continued access — a small risk with a large downside.
Verdict. Adopt it when the paper has co-authors who will not install a toolchain, which is most collaborative papers. Skip it for a solo thesis, where a local editor gives you speed, unlimited compiles, and proper version control for nothing. The condition that flips the answer is the number of people editing, not the size of the document.
.tex project is tiny; there is no version of this trade-off that favours one copy.Common questions
Is Overleaf free?
There is a real free tier — unlimited private projects, but with a compile timeout, one collaborator per project, and no Git or Dropbox sync. Paid plans remove those limits, and many universities hold site licences covering staff and students. Check with your library before paying personally.
Can I use Overleaf offline?
No. It compiles on Overleaf’s servers and requires a connection. If offline work matters, use TeXstudio or VS Code locally, optionally syncing with Overleaf through Git on a paid plan.
How do I get my Zotero references into Overleaf?
Overleaf links directly to a Zotero or Mendeley library and pulls a .bib file that stays current. Set it up once in the project’s bibliography settings — it removes the manual export step most people otherwise repeat and eventually forget.