Onebill is a popular billing platform with features like billing and revenue management, customer relationship management, channel partner management, Configure Price Quote, Enterprise Resource Planning, and Provisioning. However, it faces criticism for its default configurations that do not align with business requirements, need for extra technical support, limitations in rectifying invoices, difficult-to-understand features, time-consuming navigation, and limitations in custom reporting. There are alternatives to Onebill such as Togai, Zuora, Recurly, Maxio, and Chargebee, each with their own pros and cons. Businesses should consider these options based on their specific billing requirements.