Clustify does not allow you to message multiple primary and/or secondary recipients.

Clustify users are only be able to send messages to/receive messages from individual primary and secondary Clustify contacts.

For clarification: Primary contacts are your friends and colleagues that have installed Clustify. Secondary contacts are the friends and colleagues of your primary contacts.

Coming Soon: Clustify will allow you to create and save lists of preferred contacts that you can send messages to. Recipients will remain oblivious that you have sent your message to multiple Clustify users. Recipients will only be able to respond to you personally.