Flinkhub is free to join and use.
While creating your own Circles, each circle gets 5 free seats, and the following plans can be bought for adding more people into your circles.
University Circles maintained by Flinkhub are free for all members, and you can leverage them to grow your network.
Any number of seats
Annual plans (for 12 months) are available at 10 months pre-payment.
You can upgrade your Circles after signing in to your account in the Circles page.