App 即时通讯 SDK

1、网易云信

http://netease.im/

2、环信

http://www.easemob.com/customer/im

3、融云

http://www.rongcloud.cn/

4、极光IM

https://www.jpush.cn/common/im/

5、容联云

http://www.yuntongxun.com/api/im