I'm trying to add a SaaS recurring billing solution to my app, which is written in Ruby, we use the Sinatra framework and things like Riak.
The nice to have would be:
- A RESTful API
- Ruby API
- Returns and get JSON data (since with that will be easy to integrate with Riak)
- Cheap (we are a startup, so no enterprise solutions)
So far I was looking at: http://chargify.com/