Sulu is a billing and payments platform built for modern software in the AI age. Whether you’re a developer, engineer, startup founder, or solopreneur creating the next generation of applications, Sulu helps you monetize your products quickly and efficiently.

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What Problem Does Sulu Solve?

Traditional billing systems often struggle with the complexities of modern software, especially AI-powered or usage-based products. Simple fixed subscriptions don’t always fit when costs fluctuate based on consumption (like LLM token usage) or outcomes.

Builders face numerous challenges:

  • Real-time Billing: Accurately tracking and billing for high-volume usage events as they happen.
  • Flexible Pricing: Implementing diverse pricing models (per-user, tiered, usage-based, outcome-based, dynamic) that might vary per customer.
  • Prepaid Balance Management: Handling prepaid credits, ensuring entitlements are checked in real-time against balances, and preventing overspending.
  • Usage Limits: Enforcing limits in postpaid models to manage risk.
  • Payment Complexities: Dealing with chargebacks, fraud, disputes, and integrating separate billing and payment systems across different geographies.

Building robust systems to handle these issues distracts from your core product development. This is why we built Sulu.

Sulu is designed from the ground up to handle the demands of modern pricing models, especially usage-based and outcome-based billing common in AI applications. We abstract away the billing and payment complexity, allowing you to implement the pricing you need.

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Billing and Payments, Together

At Sulu, we believe billing and payments are two sides of the same coin. Separating them, especially with dynamic, usage-based models, creates significant friction and risk.

  • Postpaid Risks: Aggregated usage billing at the end of a cycle exposes businesses to non-payment, fraud, and cash flow issues, particularly when underlying costs (like AI model usage) are high.
  • Prepaid Complexity: Managing prepaid credits, linking them to real-time feature access (entitlements) across distributed systems, and providing customers with clear usage visibility is an engineering challenge.
  • Integration Headaches: Stitching together separate billing platforms and payment gateways adds complexity and potential points of failure.

Sulu tackles both billing and payments cohesively. Our integrated platform provides:

  • Billing Abstractions: Tools to define products, track usage (Billable Metrics), and set flexible pricing (Plans & Prices).
  • Real-time Wallets: A core component enabling true pay-as-you-go, prepaid credits, and instant entitlement checks.
  • Integrated Payments: A compliant payment system that scales with your business and customer base.

With Sulu, you get a unified system ready to go, enabling you to build your product and stop worrying about getting paid.

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Make it yours

We want to build this future together with you.

As a young startup, we have the benefits of speed and agility. We want to listen to you, your ideas, feedback, and suggestions. We want to build the products that you need.

Ways that you can build this future with us: