The best open source alternative to Feedzai is Ballerine. If that doesn't suit you, we've compiled a ranked list of other open source Feedzai alternatives to help you find a suitable replacement. Other interesting open source alternative to Feedzai is Marble.
Feedzai alternatives are mainly Fintech Infrastructure Tools but may also be Financial Risk Management Tools or Security & Privacy Tools. Browse these if you want a narrower list of alternatives or looking for a specific functionality of Feedzai.
Reduce fraud, accelerate underwriting, and maintain compliance with AI-driven merchant risk intelligence for PSPs, banks, and fintechs.

Merchant risk teams spend excessive time on manual data collection and review, often trapped by outdated rule-based systems that generate false positives and miss complex fraud patterns. Ballerine transforms this workflow by converting fragmented merchant data into clear, real-time risk profiles powered by AI agents, enabling underwriters to focus on high-value decision-making rather than data gathering.
The platform delivers measurable impact across three critical areas:
Key capabilities include real-time risk assessment, seamless integration with existing systems and data sources, and compliance-ready infrastructure designed for fintech regulations. The platform scales expertise across your team, allowing smaller compliance departments to handle larger merchant volumes while maintaining rigorous standards.
Customers report significant operational improvements: 70% reduced manual efforts, 49% faster review resolution times, and 30% increase in detected fraud. The solution is trusted by leading PSPs, banks, and fintechs seeking to balance speed with security in merchant onboarding and ongoing risk monitoring.
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.
An open-source platform that enables fintech companies to monitor transactions and user activity, detect suspicious behaviors, and automate fraud prevention in real-time.

Marble is a powerful open-source fraud and AML decision engine built specifically for fintech companies and financial institutions. The platform enables real-time monitoring of various events including transactions, logins, signups, and account changes.
Key benefits include:
As an open-source solution, Marble provides transparency, security, and community-driven development while helping companies scale their fraud prevention efforts effectively.