2. Maxio

Maxio is a subscription billing and management platform that supports B2B Saas companies manage recurring revenue and usage-based billing. It handles billing, subscriptions, contract terms, invoicing, and revenue recognition, making it dependable for companies with scaling pricing and multi-line product catalogs.

Key features

• Usage-Based, Tiered, and Hybrid Billing: You can set up flexible pricing models; usage-based, tiered, or hybrid so that your customers pay only for what they use, while you keep billing simple and scalable.

• ASC 606 compliant revenue recognition: Stay audit-ready with built-in revenue recognition that meets ASC 606 standards, so your financials are always accurate and compliant.

• Multi-currency and tax workflows: Support global customers effortlessly with multi-currency billing and automated tax workflows, making cross-border payments smooth and hassle-free.

• Contract-based invoicing: Automatically generate and send invoices based on contract terms, so every deal is billed accurately and on time.

• Financial dashboards and analytics: Get real-time visibility into your key metrics like MRR, ARR, and churn, so you can make smarter, data-driven decisions for your business.

3. Younium

Younium is a B2B subscription and billing management platform for SaaS companies that manages complex contract structures and usage rules. It is helpful for companies with negotiated deals, large customer accounts, and multi-year agreements that require accurate billing and controlled entitlement management.

Key features

• Contract-level subscription and usage rules: You can set up detailed rules for each contract, so every deal no matter how complex is billed accurately and automatically.

• Support for tiered and hybrid pricing:ou can mix and match pricing models like tiered, hybrid, and milestone-based billing to match your customers’ needs

• Multi-entity and multi-currency support: You can manage multiple entities and currencies in one place, making international expansion and large customer accounts easier.

• Subscription lifecycle management: You get full control over your subscriptions from onboarding to renewal so that you can scale without manual hassle.

• Integration with CRM and ERP systems: You can sync billing data seamlessly with your CRM and ERP, keeping sales, finance, and operations aligned.

4. Recurly

Recurly is a subscription billing system that supports metered and tiered usage as add-ons. It is designed for companies with recurring revenue models, such as SaaS, streaming, and subscription box services, to handle the complexities of billing, customer lifecycle management, and revenue optimization.

Key features

• Usage-based add-ons and metered pricing: You can offer flexible, usage-based add-ons that bill customers precisely for what they consume, from API calls to compute minutes.

• Smart dunning and revenue recovery: Recurly helps reduce failed payments and recover revenue with intelligent retries and automated dunning campaigns, so your cash flow stays steady.

• Global currency and tax support: Easily handle international customers with multi-currency billing and automated tax calculations, simplifying global operations.

• Customer lifecycle management: You get a full view of your subscribers’ journey, enabling you to improve engagement, retention, and upselling strategies.

• Flexible subscription flows: Create smooth, customizable subscription processes including trials, pauses, and cancellations to suit your customers' needs.

5. Zenskar

Zenskar is a B2B billing platform built for SaaS teams that supports powerful contract engines and detailed finance workflows to manage complex pricing structures across customers and product lines.

Key features

• Contract-based usage and subscription terms: You can set billing and subscription terms per contract, so every deal is tailored to your customers’ needs.

• Hybrid pricing support: You can offer flexible pricing models; tiered, volume-based, or hybrid to match any customer segment or usage pattern.

• Usage ingestion and aggregation: You can capture and aggregate usage data from multiple sources, ensuring accurate billing and reporting for complex SaaS products.

• Automated billing workflows: You can automate invoicing, payments, credits, and collections, reducing manual work and minimizing errors.

• Finance and revenue reporting: You get real-time financial dashboards and automated reports, so you can track revenue, expenses, and profitability with ease.

Key Features to Look for in Usage-Based Billing Tools

• Ability to Meter Real Usage Accurately

Your choice of tool should let you define your own metrics, set up aggregation rules, and ingest events in real time. The best platforms record usage data continuously, so that you never lose track of what is being billed.

• Flexible Pricing Configuration & Experimentation

Your billing tool should make it easy for you to test and launch different pricing models; be it usage tiers, volume discounts, hybrid plans, feature bundles, credits, and even customer-specific overrides. The more the flexibility, the faster you can experiment and respond to market needs.

• Real-Time Visibility into Usage and Costs

Transparency is the key. Customer dashboards, alerts, invoice previews, and margin visibility help both your customers as well as your teams avoid billing surprises and disputes. When everyone can see usage and costs in real time, you build trust both internally and externally.

• Strong Integration Ecosystem

A great billing tool connects seamlessly with your CRM, customer portal, payment gateways, data warehouses, and other internal systems. This keeps your workflows smooth and consistent.

• Support for Credits, Wallets, and Prepayments

If your product relies on prepaid credits or wallets which is common in SaaS, AI, communication, and automation platforms where your billing system should handle drawdowns, rollovers, and expirations with ease.

• Reliability and Accuracy at Scale

When usage spikes or your customer base grows, your billing tool must handle high-volume data without errors. Consistent results and zero billing drift are non-negotiable for scaling your SaaS business.

How Flexprice Helps you Navigate the Landscape

• Designed for Modern SaaS and AI Pricing Models

With Flexprice, you get the flexibility to launch or evolve usage-based, hybrid, or credit-based pricing without rewriting billing logic. It matches the needs of companies building AI agents, APIs, automation tools, and infrastructure services. It helps you to scale your product and business needs conveniently.

• Built for Engineering Teams that Want Control and Not Constraints

Flexprice is open-source and can be self-hosted, allowing your teams to deploy your own custom pricing and billing logic, integrate seamlessly with your internal systems, maintain data privacy, or run pricing workflows. You get full control over your data at a granular level without any vendor lock-ins

• Helps you Avoid Billing Rewrites as you Scale

With event-driven metering, credit wallets, entitlements, and contract-level overrides, Flexprice supports you with future pricing changes without disrupting your product or customers.

• A Complete, Extensible Billing Foundation

You can use Flexprice as the central pricing engine while connecting it to payment gateways, CRMs, invoicing tools, or finance systems. It is the extensible foundation that grows with your business.

Frequently Asked Questions (FAQs)

1. How do I prevent billing disputes with usage-based pricing?

Key features that reduce disputes: Real-time usage dashboards; Invoice previews; Customer dashboards; Audit-safe raw events; Contract-level overrides with transparency. Flexprice provides these out of the box.

2. How do I know if my SaaS is ready for usage-based pricing?

You’re ready if your product has API usage, tokens or compute workloads, feature-level entitlements, large differences in customer usage, unpredictable workloads and enterprise customers demanding flexibility. If billing rewrites or pricing updates slow you down, its time you implement usage-based pricing.

3. How do I avoid billing rewrites as my pricing model evolves?

Choose a platform with an extensible, event-driven foundation like Flexprice that allows you to adapt pricing, metering, and contracts without major backend changes or rewrites.

4. Can usage-based billing tools handle enterprise contracts with custom pricing?

Yes, leading platforms like Flexprice support contract-level pricing, custom entitlements, minimum commitments, and overrides. This allows enterprises to negotiate unique terms while maintaining accurate and automated billing.

5. What’s the difference between traditional and usage-based billing tools?

Traditional tools focus on fixed subscriptions, while usage-based platforms like Flexprice track real-time consumption (API calls, tokens, compute, etc.) and support flexible pricing models, entitlements, and hybrid billing for modern SaaS and AI products.