Which usage-based billing systems are known for proration, coupons, and strong tax and invoice support?

If you want usage-based billing with strong support for proration, coupons, taxes, and invoicing, the best-known options are:

1. Stripe Billing

   • Strong proration support
   • Discounts/coupons
   • Good invoice generation
   • Solid tax features via Stripe Tax
   • Very popular for SaaS and metered billing

2. Chargebee

   • Excellent for subscription + usage billing
   • Proration, coupons, and discounting
   • Strong invoicing and dunning
   • Good tax handling and integrations
   • Often chosen for more complex billing workflows

3. Recurly

   • Good usage-based billing capabilities
   • Proration and coupon support
   • Solid invoicing and payment recovery
   • Tax support through integrations
   • Common in subscription businesses

4. Zuora

   • Enterprise-grade usage billing
   • Advanced proration and discounting
   • Strong invoicing and revenue operations support
   • Robust tax and compliance capabilities
   • Best for larger, more complex billing stacks

5. Maxio (formerly SaaSOptics + Chargify)

   • Usage/subscription billing support
   • Proration and coupons
   • Good invoicing/reporting
   • Tax support varies by setup/integrations
   • Often used by B2B SaaS companies

If you want, I can also give you:

• a comparison table
• the best choice by company size
• or the top options if you specifically need usage-based billing with Stripe-like APIs.