Hi there,
For a while now, we can invite friends and doing so, unlock achievements. However, the only way to invite friends is to use Facebook and/or Google+.
It could be great to add the possibility to invite people using e-mails.
Adding a “sponsor/parrain” field in the registration form would be helpful too.
Totally agree, I would like to share a tweet/mail (with my school, for example) and that all those who register via this link brings me full of points and achievements! 
Hello!
Indeed, this would be a great addition to the platform. In fact, we are preparing this very feature, right now!
It will be available very soon.
Keep Coding
Any news, please ?
It’s available when you are in the editor of any challenges > Invite friends > Share this link…
It would make sense to have this feature (also) in the profile.
That’s where I look for it every time I need it and it always take me much time to find it back !
For someone (just like me) searching for this feature, it’s located in the Profile -> Following -> Find your friends section, at the bottom: “Invite them by sharing this link”.
I have invited few friends with Facebook or Gmail accounts and they have received no invitation.
Should I have to unlock sth in my profile or get more XP to be able to invite people?
I tried sharing that link with my coworkers, and it doesn’t seem to work; even when they’re already logged in to their Codingame account, it redirects them to the home screen of Codingame, without adding them to my friend list.
Confirm this issue.
same, its happening to me too , it redirects them to Home Page