Question: I need a solution that can help me automate my SaaS billing process without incurring additional transaction fees.

If you want to automate your SaaS billing without paying for transaction fees on top, Paigo is a good choice for a full-featured solution. It can handle many pricing schemes and integrates with thousands of other apps. Paigo offers a billing OS that can be customized, real-time metering for usage-based pricing, and analytics to help you understand billing and usage data. It also offers a free forever plan with unlimited users and access to all features, so you can start with a low cost of entry.

Another option is Metering.ai. This service generates Stripe invoices based on product usage data, so you don't have to worry about manual errors and your finance and operations teams can focus on higher-level work. It can handle complex calculations and integrates with billing services like Stripe, Zuora, Chargebee and Recurly. Metering.ai is geared for companies with usage-based pricing, but you can use its free tool to process CSV files exported from various analytics tools.

If you want an AI-powered order-to-cash service, Streamlined automates invoicing and accounts receivable work. It offers flexible payment options, real-time payment reconciliation and smart customer reminders. Streamlined integrates with e-commerce sites like Shopify, accounting software like QuickBooks and enterprise resource planning tools like NetSuite, so it can help small and large businesses streamline their order-to-cash operations and cut back office expenses.

Last, OpenMeter is an open-source system for usage-based billing and cloud cost management. It can be used with common programming languages and cloud infrastructure components, and it offers features like real-time customer dashboards and high scalability for metering. Its pricing is transparent, including a free option, and OpenMeter can help you optimize pricing and control costs.