Flexprice
Flexprice is an open source, developer-first platform designed to simplify metering, pricing, and invoicing for SaaS and AI products. It enables teams to build usage-based, credit-based, or hybrid pricing models with full control. Flexprice's real-time usage metering allows you to define granular events, such as API calls, compute time, or custom actions, and track them reliably, even at scale. It supports prepaid and promotional credits, auto top-ups, and expiration rules, all configurable without extra logic. Its flexible pricing engine lets you define and iterate on seat-based, usage-based, or hybrid plans, override them per customer, and adapt pricing over time without additional engineering effort. With built-in feature management, you can define Boolean, metered, and config features per plan and customer, enforcing limits directly in your backend. Flexprice generates accurate invoices from real-time usage, subscriptions, or credits.
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BlueSnap
BlueSnap's All-in-One Accounts Receivable Automation solution, formerly Armatic, is the highest rated software solution for Payment Processing, Billing/Invoicing, Recurring Billing and Subscription Management.
Billing and Invoicing: Create beautiful invoices with our powerful invoice editor synced into your accounting system. Provide a customer portal, automatic charging, payment collection, and apply late fees.
Recurring Billing & Subscription Management: BlueSnap provides enterprise-class subscription billing management for fast-growing businesses worldwide. Enable trial periods, manage plans, or prorate subscriptions.
Payment Processing: BlueSnap is processor agnostic and provides integrations to all types of payment solutions from credit card payments, ACH, SEPA to wires. We handle partial payments, automatic failed payment retry, and automatic payment recovery.
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Hyperline
Hyperline is a unified revenue management platform built to simplify the entire quote-to-cash cycle for modern businesses by bringing CPQ (configure-price-quote), automated billing, subscription and usage-based pricing, invoicing, payment collection, and real-time reporting into one system that scales with complex pricing models and diverse customer needs. It lets sales teams generate accurate, branded quotes, approvals, and contracts quickly, directly integrated with your CRM, while finance teams automate invoicing, reconcile revenue, and gain visibility into key metrics like ARR and cash flow without manual work or spreadsheets. The flexible pricing engine supports flat fees, seat-based charges, usage-based billing, hybrid models, custom terms, and subscription phases so teams can tailor offerings to customers without engineering help, and it connects with major payment providers, CRMs, ERPs, and analytics tools to keep all revenue data synchronized.
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OneBill
OneBill is an end-to-end subscription management, billing, and revenue management platform that powers the entire customer lead-to-revenue generation experience. OneBill supports all types of billing models such as one-time billing, subscription billing, recurring billing, and usage-based billing. OneBill’s seamless integration with other enterprise systems such as carriers & service providers, payment gateways, accounting & admin, taxation, and CRM & ERP platforms is made possible with open APIs.
The platform covers all aspects of a business from CPQ, automated order provisioning & activation, billing & invoicing, all the way to revenue reporting, customer subscription management, and channel partner commission management.
OneBill has been helping SMBs, SMEs, and large enterprises to reduce billing errors, compliance risk and drive greater efficiency with an end-to-end billing and revenue management solution fully integrated with some of the world’s leading solutions.
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