Chatwoot: Free Open-source Support Center Platform 

This is a great tool. Even has a REST API to integrate it with other applications. Thanks for the recommendation!

One more of the great open source software has coming thanks for the great explanation we'll try to install and integrate into our mobile applications

a video on erxes?

This is a really cool tool. Iam already using it a bit.

But self hosted option only have 5 agents limit!!!!