The company (not a startup but an enterprise) I work for uses Lync and it is awesome!<p>If you work in a startup or founded a startup, what app do you use? And, what are your experiences with it?
For team/internal chats we use a combination of Skype & <a href="https://www.hipchat.com/" rel="nofollow">https://www.hipchat.com/</a>