The best open source alternative to Formance is Hyperswitch. If that doesn't suit you, we've compiled a ranked list of other open source Formance alternatives to help you find a suitable replacement. Other interesting open source alternatives to Formance are: Lago, Crater, Paymenter, and Flowglad.
Formance alternatives are mainly Payment Infrastructure Tools but may also be Fintech Infrastructure Tools or Subscription & Billing Management Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Formance.
A unified payment infrastructure that connects multiple payment processors through a single API integration, enabling global payment processing

Hyperswitch is a powerful open-source payment orchestration platform that simplifies global payment processing.
Key benefits include:
The platform offers modular components including payment processing, reconciliation, analytics, and fraud prevention that can be customized based on business needs.
Looking for open source alternatives to other popular services? Check out other posts in the alternatives series and openalternative.co, a directory of open source software with filters for tags and alternatives for easy browsing and discovery.
Open-source billing system that handles metering, usage-based pricing, and invoicing at scale. Perfect for AI, cloud, and API companies needing flexible monetization.

Lago delivers enterprise-grade billing infrastructure that scales with your business needs. The platform excels at processing high-volume usage data (up to 15,000 events/second) and converting it into accurate invoices through real-time metering.
Key capabilities include:
As an open-source solution, Lago provides full transparency and customization options. Companies can audit the code, maintain data control, and build custom features on top of the core platform. The system integrates seamlessly with popular tools like Stripe, NetSuite, AWS Marketplace, and accounting software.
Trusted by industry leaders including Mistral AI, Algolia, and Github, Lago has proven its ability to handle complex billing requirements at scale. The platform is particularly valuable for AI companies, cloud services, API providers, and fintech firms needing sophisticated usage-based monetization.
Crater offers AI-driven invoicing workflows, payments, and working capital tools to enhance your platform with minimal technical effort.

Crater: Revolutionizing Financial Operations with AI
Crater is an innovative AI-powered embedded AR/AP automation solution designed to transform how platforms handle financial operations. With minimal technical lift, you can integrate powerful tools that streamline invoicing, payments, and working capital management.
Key Features:
Intuitive Invoicing Workflows: Simplify the process of paying and getting paid with user-friendly interfaces.
Seamless Payment Integration: Offer ACH and card acceptance with simplified onboarding for your users.
Working Capital Tools: Solve cash flow challenges with advanced AR/AP features, including 'Buy Now, Pay Later' options.
Accounting Automation: Enable effortless data integration between your platform and popular accounting software.
AI-Powered Financial Copilot: Get instant answers to financial questions, create invoices, and generate reports with ease.
Benefits for Your Platform:
Crater's AI-driven approach ensures that your platform stays at the forefront of financial technology, offering a competitive edge in today's fast-paced digital economy. By automating complex financial processes, you free your users to focus on growing their businesses while providing them with the tools they need to succeed.
Get Started with Crater
Transform your platform into a fintech powerhouse. Contact us today for a demo and discover how Crater can elevate your offering and drive user satisfaction.
Automate subscriptions and manage payments with a flexible, open-source billing system designed specifically for hosting providers.

A powerful billing platform built specifically for hosting businesses, Paymenter offers comprehensive payment management without vendor lock-in. The platform features automated subscription handling, multi-currency support, and seamless service deployment integration.
Key capabilities include:
The platform is highly customizable with themes and extensions, allowing you to create a tailored billing experience.
The system offers exceptional performance, responsive design across all devices, and cloud deployment options starting at $5/month. Perfect for hosting providers seeking a transparent, community-driven billing solution with extensive integration options.
Build payment systems with real-time billing state and full-stack SDK. Design pricing in natural language, deploy checkout and metering instantly with zero webhooks.

Open-source payment infrastructure that eliminates the complexity of traditional payment integrations. Build sophisticated billing systems without wrestling with webhooks or managing fragile data synchronization.
Real-time billing state means your application always has access to current customer entitlements and usage data directly from the source. No more webhook delays or sync failures that break your user experience.
The full-stack SDK provides React hooks and backend functions that let you implement checkout flows, customer portals, and usage tracking with minimal code. Design pricing models using natural language and deploy instantly.
Key advantages:
Built by developers for developers, with transparent pricing that scales with your business. Currently processes payments through Stripe with plans to support additional providers. Perfect for SaaS applications, API services, and any business requiring sophisticated billing logic without the traditional complexity.