Yes! Once online, you will have access to a friends list that you can toggle on by clicking on the Echo icon in the bottom right corner.  From there you can:

• See which friends you have already added that are online/offline
• Add a new friend by sending a unique friend code or inputting their code a friend gives you

Anyone you play with will still need to download the Arkheron client for their chosen platform. 

If a friend is online and in-game, you can invite them to party with you by clicking on their profile and sending a party invite. You can party with up to two friends.