Overleaf
The dominant cloud LaTeX editor for academic writing — collaborative, real-time, and used by most journals for author submission. The paid tier adds AI writing assistance, unlimited collaborators, and tracked changes.
What it does
Overleaf is a cloud-based LaTeX editor that has become the default writing environment for most scientific fields that use LaTeX — physics, mathematics, computer science, engineering, and increasingly biology and chemistry. It runs entirely in the browser: no local LaTeX installation required, nothing to configure, and collaborative editing works like Google Docs.
Core features:
- Real-time collaborative editing with multiple authors
- Compilation to PDF in the browser (pdfLaTeX, XeLaTeX, LuaLaTeX)
- Rich template library (journal submission templates, thesis templates, CVs, posters)
- Git/GitHub sync for version control
- Tracked changes and review comments (paid tiers)
- Integration with reference managers (Zotero, Mendeley) via bibliography import
AI writing features (2024–2026)
Overleaf has progressively integrated AI writing assistance into the editor, powered by a combination of in-house models and third-party LLMs:
Autocomplete. Context-aware sentence completion as you type, similar to GitHub Copilot but tuned for academic prose and LaTeX syntax. It completes mathematical descriptions, transitions, and standard academic phrasing.
Rephrase and shorten. Select a passage, right-click, and ask Overleaf to rephrase or shorten it. The AI suggestions stay in the editor as tracked changes, so you can accept, reject, or modify them.
Error explanation. When LaTeX compilation fails, Overleaf’s AI can explain the error in plain English and suggest a fix — significantly reduces the frustration of debugging cryptic TeX error messages for occasional LaTeX users.
Overleaf Copilot (beta). A chat interface for asking questions about LaTeX syntax, requesting code snippets for specific formatting, or getting help with mathematical notation.
Why researchers use Overleaf
Journal submission compatibility. Most high-impact journals in physics, CS, and math require or strongly prefer LaTeX submissions, and Overleaf supports most journal templates directly. Submitting from Overleaf to arXiv or directly to a journal requires a single export step.
Collaboration without version conflicts. The real-time editing model eliminates the “who has the latest version?” problem that plagues Word-based collaboration. Tracked changes (paid) gives a revision history comparable to Google Docs.
Template library. The Overleaf template gallery includes official templates for Nature, ACS, IEEE, Springer, Elsevier, and most major journals, pre-configured with the correct formatting, bibliography style, and section structure.
Limitations
LaTeX has a learning curve. Overleaf makes LaTeX accessible but does not make it easy. Researchers unfamiliar with LaTeX syntax will spend time learning the language before they can write fluently. For fields where Word submission is standard (many social sciences, medicine), LaTeX has no practical advantage.
The free tier is genuinely limited. One collaborator means the free tier is effectively a personal tool. Teams need a paid plan. Check institutional licenses first — many R1 universities provide Professional access to all faculty and students.
Compilation times can be slow for large documents with many figures. The free tier has shorter compile time limits; Professional offers longer sessions.
AI features are on paid tiers. The autocomplete and AI writing assistance require a Standard or Professional subscription.