Have you looked at Outseta? https://www.outseta.com/billing https://www.outseta.com/billing and https://www.outseta.com/demo https://www.outseta.com/demo . I ha

Have you looked at Outseta? https://www.outseta.com/billing https://www.outseta.com/billing and https://www.outseta.com/demo https://www.outseta.com/demo . I haven't used it but it looks great. I'd love to hear what you think.