SHAHRIAR LABSIntelligence in Motion
    Launched · letx.app

    Collaborate on LaTeX
    in Real Time

    LetX is a browser-based collaborative LaTeX editor — a modern alternative to Overleaf with CRDT-powered live sync, secure cloud compilation, and zero installation required.

    Open LetX — It's FreeAll Products

    Everything you need to write LaTeX faster

    LetX combines powerful LaTeX tooling with a collaborative editing experience built for researchers, students, and teams.

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    Real-Time Collaboration

    CRDT-powered sync. Multiple authors edit simultaneously — changes appear instantly for everyone, zero merge conflicts.

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    Cloud LaTeX Compilation

    No local TeX installation needed. Secure cloud servers compile pdflatex, XeLaTeX, and LuaLaTeX documents in seconds.

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    Browser-Native Editor

    A fast, distraction-free editor built for technical writers. Syntax highlighting, auto-complete, and split PDF preview — all in your browser.

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    Secure & Private

    Your documents are encrypted in transit and at rest. Compilation happens in isolated sandboxes. Your research stays yours.

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    Project Management

    Organize your papers, theses, and presentations into projects. Share with co-authors via link. Role-based access control.

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    Academic-Ready

    Ships with IEEE, ACM, Springer, Nature, and APA templates. BibTeX and natbib citation management built in.

    Trusted for academic, research & industry LaTeX projects

    IEEE-format papers·PhD theses·Springer submissions·ACM papers·Research proposals

    Frequently Asked Questions

    What is LetX?
    LetX is a real-time collaborative LaTeX editor that runs entirely in the browser. It lets multiple authors edit the same document simultaneously, compiles LaTeX to PDF via secure cloud compilation, and works as a modern alternative to Overleaf with faster performance and a cleaner interface.
    How does LetX compare to Overleaf?
    LetX offers real-time collaboration, cloud-based LaTeX compilation, and a distraction-free editing experience similar to Overleaf. Key differences: LetX loads significantly faster, compilation runs on dedicated infrastructure, and the UI is designed for deep focus writing. LetX is built by Shahriar Labs and is actively adding collaborative features.
    Is LetX free to use?
    LetX offers a free tier that lets you create, edit, and compile LaTeX documents in real-time. You can collaborate with others on shared projects without any upfront cost. Premium features for larger teams and advanced storage are available on paid plans.
    How does real-time collaboration work in LetX?
    LetX uses CRDT (Conflict-free Replicated Data Type) synchronization to merge edits from multiple authors simultaneously without conflicts. Every keystroke is synced in real time across all collaborators on a document. Changes appear instantly for all connected users, and the document state is always consistent.
    Can I compile LaTeX in the browser with LetX?
    Yes. LetX sends your LaTeX source to Shahriar Labs' secure cloud compilation servers, which run a full TeX distribution including pdflatex, XeLaTeX, and LuaLaTeX. The compiled PDF is returned to your browser within seconds. No local LaTeX installation is required.

    Start writing LaTeX today

    No installation. No credit card. Just open LetX and start collaborating.

    Open LetX Free →

    Built by Shihab Shahriar Antor at Shahriar Labs