Question: I need a real-time billing solution that can enforce limits and block costly overages, do you know of any options?

If you're looking for a real-time billing system that can enforce limits and prevent expensive overages, Zuora could be the way to go. It's a subscription and monetization platform that spans the entire customer lifecycle, with flexible pricing, revenue recognition and payment orchestration. Zuora offers real-time visibility and automated revenue recognition to help you fine-tune pricing and improve customer relationships. It can link to CRM, ERP and other software, so it's good for companies of all sizes.

Another good option is OpenMeter, an open-source, highly scalable usage-based billing system. It offers real-time customer dashboards, balances, credits and quotas management, with low-latency limit enforcement. OpenMeter can link to commonly used programming languages and cloud infrastructure components, so it can be used in a variety of situations. Its transparent pricing and flexible metering abilities make it good for optimizing pricing and controlling costs.

For a full-featured SaaS billing management system, check out Paigo. It can handle a variety of pricing models and offers real-time metering for usage-based pricing. Paigo includes a customizable billing OS for defining and testing pricing strategies, revenue operations automation and analytics to help you extract billing data insights. It can link to thousands of apps, and its pricing plans are flexible, so it's a good choice for companies of all sizes.

Last, Stigg is a headless pricing platform for fast-moving teams. It automates tasks like billing, trials, usage metering and feature limits so developers can focus on higher-level work. Stigg can link to services like Stripe and AWS Marketplace, and it has a pay-as-you-go pricing model with a free tier, so it's good for companies that need to scale.