Here are some Chargify alternatives that we are looking at: Recurly, http://recurly.com/pricing/ at 200 transactions and 500 users $29/m - Spreedly, http://spreedly.com/info/pricing/ at $19/m + $0.20/transaction or 2% per transaction if less - CheddarGetter, https://cheddargetter.com/pricing at $39/m -> 1000 customers, $0 per transaction.
At the moment, we're probably going to switch to Spreedly, since the rates look good and they've been around for a while. Depends on what kind of dunning management they have.
Correct me if I'm wrong, but it's pretty ironic that it was part of the lean startup bundle.