I have a project that requires many people working together on a large flowchart with a few thousand entries. There are many flowchart software (or website) out there but is there any that allows you to work together as a group like google docs does without having to save and send updated copies to everyone every time someone makes an edit? Also, preferably free.
https://www.lucidchart.com/ has a good colloborative offering. They have a free version, but limited. They also allow you to connect it to Google Drive.