Seafile Online excel and word editor

Hi all, we are currently using OnlyOffice as the online editor.
However, it only supports 20 connections at the same time.
It has a lifetime license of $2400 for 100 simultaneous connections.
Wondering is there any other solutions for online editor? Does it support Microsoft or something else?

Thanks in advance.

Hi Vincent,

of course, there are other solutions.

For CE, you can also use Collabora:

Seafile PE, besides ONLYOFFICE and Collabora, also support MS OOS: