If you mean our free mobile apps, as you don't get the source code it would be rough to do. But, since SocialNetworking.Solutions provides those for us, you can check with them to see if they have an integration and how much it would cost as the free apps don't have a way to customize without their guidance.
Hello, I had cometchat full paid and was a disaster as assistance and never working good, now that is on cloud I have no idea. Arrowchat I have it for 3 years and never had an issue. What I can suggest is to get anyway the push service so you reduce the use of your own server