Papeeria's website notes that it is for use with with "pure LaTeX" or in combination with Markdown. Like Overleaf, it is web-based and requires only a web browser to use; it runs on both desktop and mobile devices.
Papeeria offers a variety of templates for various types of publications (although, as noted elsewhere in this research guide, we strongly encourage you to use the template provided by the Evans Library when preparing a thesis or dissertation).