Subscription and billing management service

We are looking for a reliable web platform to manage subscriptions and billing for a growing online service. We want to configure pricing plans, billing periods and free trials with full flexibility, and to renew subscriptions and charge customers automatically without manual work from our staff. The system must issue invoices, generate closing documents and keep a complete payment history for every customer in a single place. Clear reports on revenue, customer churn and overdue payments are essential for us, so that we can see the real state of the business at any moment and make decisions based on numbers rather than guesswork. We need automatic notifications sent to customers about upcoming renewals, failed charges and the end of a trial period, delivered by email and through messengers. We expect a convenient administrator panel, granular staff permissions and an action log so that every change stays transparent and traceable. Integration with several payment gateways, automatic retries of failed charges and export of data to accounting would be very welcome. The solution must handle a rising number of customers without losing speed and stay easy to operate for people without long training.