PayWhirl is a cloud-based solution that helps businesses manage subscription billing and recurring payments via a unified portal. The software allows organizations to send custom emails/invoices or communicate with clients using predefined templates. PayWhirl allows enterprises to embed a personalized widget or self-service portal to the existing website, letting customers log in and manage subscription plans. It offers various features such as one-time payments, secure gateway connections, API, and more. PayWhirl allows users to track monthly revenue and gain insights into sales metrics, annualized run rate (ARR), customer lifetime value (CLV) and other metrics.