Free forever
This service wouldn't exist without a bunch of awesome open-source projects so logically it's our duty to help back, and make it free for every open source project.
Free for now
We haven't set up payment processing just yet, so until we do you can enjoy FeatHub for free.
Don't worry though, when it'll become a paid service, its pricing will be very reasonable (i.e. cheaper than GitHub or Travis for example).