This is an example or typesetting an approximation of the Overleaf logo, using the freely available fonts TeX Gyre Adventor and academicons.
We hope you like it! We created it in response to a request from an Overleaf user who wished to include the sentence This document was created in \overleaf in their project. If you'd like to use this in your projects, please feel free to, but please also bear in mind our Acceptable Use Policy; the logo shouldn't be used to imply something is 'official' or otherwise endorsed by Overleaf.
If you have any questions about it please get in touch!