Best Free Usage-Based Billing Software

Paddle is a subscription commerce and billing platform for Software and SaaS companies. It’s more difficult than ever to keep up with customer demands, to find new international growth opportunities, and to manage your internal resources effectively. With Paddle, you spend less time on fixing internal roadblocks and can focus on scaling your business. Paddle provides a full suite of tools from optimized checkout to sell your software, to recurring billing, fraud detection, manual invoicing, sales taxes, global currencies, customer support, analytics and much more, all in one platform. Choose how you want to sell, Paddle supports every type of sales motion. Optimize your checkout for conversions, scale your sales-assisted invoicing to more business accounts, and add subscription billing

The first scalable monetization platform, for the modern billing stack. Eliminate risk, retain focus, and power more pricing and packaging options with less code. A monetization platform is a standalone middleware that sits between your application and your business applications, as part of the modern enterprise billing stack. Stigg unifies all the APIs and abstractions billing and platform engineers had to build and maintain in-house otherwise. Acting as your centralized source of truth, with a highly scalable and flexible entitlements management, rolling out any pricing and packaging change is now a self-service, risk-free, exercise. Stigg gives engineers fine-grained control over what can be packaged and priced separately. You can set limits and govern your customers’ commercial permissions at the feature level, abstracting away complex billing concepts from your code. Entitlements are the modern way to software monetization and truly flexible hybrid pricing.

Alguna is an AI-native quote-to-revenue platform built for AI, SaaS, and fintech companies that require speed, accuracy, and flexibility across the revenue lifecycle. It unifies pricing, CPQ, billing, payments, usage metering, invoicing, and revenue recognition in one system so teams can launch pricing models quickly, automate revenue workflows, and operate from a single source of truth. It replaces fragmented billing stacks and patchwork systems that create manual work, unreliable integrations, data silos, invoice disputes, reconciliation headaches, and revenue leakage. With no-code configurability and real-time metering, Alguna helps companies monetize faster and scale without operational drag, supporting subscriptions, consumption pricing, outcome-based pricing, and hybrid pricing models. Teams can configure pricing models and discount rules without code, connect quotes directly to subscriptions, invoices, billing, and revenue reporting.