LetX.app VS Codegres.org

LetX.app's answer

Researchers, postgraduate students and academic staff writing papers, theses and grant proposals, along with the labs and university departments they work in. Usage concentrates around thesis submission and journal deadlines. A secondary audience is job-seekers and engineers using the CV and résumé templates.

LetX.app's answer

Go with Gin for the API; React, TypeScript and CodeMirror 6 on the front end; Yjs CRDTs over WebSocket for real-time collaboration; PostgreSQL, Redis and S3 for storage and coordination; and SQS-queued compile workers running a full TeX Live distribution on AWS ECS Fargate.

LetX.app's answer

LetX is used by individual researchers and students at 90+ universities and research labs in 30+ countries, including INGV Italy, INPE Brazil, CAB CSIC-INTA Spain, UCSD, TUM and Korea University. These are institutions where our users are based rather than institutional accounts.

LetX.app's answer

Overleaf charges as you add collaborators and gates version history behind a subscription. LetX gives unlimited collaborators free, with full history on Pro at $18/month and a separate Academic Pro plan at $9/month for verified students, faculty and university staff.

Against the newer AI-native editors, the difference is what happens to your manuscript. LetX declares ai-train=no, so your unpublished work is never used as training data.

Against desktop editors like TeXstudio or Texmaker, there is nothing to install or maintain, and every co-author gets an identical environment.

LetX.app's answer

Three things nothing else in the category combines. Collaboration is genuinely unmetered: every plan, including free, allows unlimited simultaneous collaborators, so cost never scales with the number of co-authors. The AI assistant runs the actual build and reads the actual error log, rather than producing LaTeX you paste elsewhere and debug yourself. And LetX declares ai-train=no, so unpublished research is never training data. The library is also unusually deep for regional needs: 1,019 templates, including university-specific thesis formats most editors don't carry.

LetX.app's answer

LetX started because collaborative LaTeX was either expensive or private in name only. Overleaf's pricing scales with the people you write with, which is backwards for a thesis committee or a five-author paper. Then the AI-native editors arrived with a worse trade: faster tooling in exchange for sending unpublished work to model vendors.

LetX was built to refuse both unlimited collaborators on every plan, and an explicit ai-train=no declaration. Launched 27 January 2026, it has grown to 3,000+ users across 260+ universities and research labs in 55+ countries, largely by publishing the regional university thesis templates nobody else maintained.