Overleaf is a free, collaborative, online LaTeX document creation platform for university students, staff, and faculty. LaTeX is a document preparation system that uses a markup language to format and display information and print it out on paper in the form of a scientific paper pdf e-book. Overleaf is a collaborative cloud-based LaTeX editor used to write, edit, publish scientific documents to a common format for both a scientific journal or an international conference proceedings book with international scientific works. It can be upgraded when you need to organize an international conference or support an international journal publication. Get the best Overleaf experience with flexible plans for everyone—from students, lecturers and individual researchers, to large businesses and universities. For small teams and departments that want to write and collaborate easily in LaTeX. For teams and organizations that want streamlined logins and our strongest cloud security. For large organizations and facilities that need site-wide access or an on-premises solution. With upgrade costs ranging from free to $7.45, $16.60, $33.25 per month, billed annually.