You can invite your friends to Wickr Me who are not already in Wickr by going to your Settings > Contacts > Tapping + Invite to Wickr.
This will allow you to invite your friends by either sending a text or email from your device. The SMS/email will point them to the App stores to download the app and provide your potential future Wickr contact with your Wickr ID. The target contact will need to download the app, and create a Wickr ID to communicate with you in the Wickr App.
We never store your device contacts on our servers. All invitations are generated locally on your device, without sharing any information with us.
To add Contacts who already have a Wickr ID (username), please see: