Top Open Source Fraud Prevention Tools in 2026
A curated collection of the 18 best free and open-source Fraud Prevention tools in 2026. Compare features, GitHub stars, tech stacks, and self-hosted software.
Tirreno
Open source security framework for threat monitoring
Stars1,503Last commit23d agoLicenseAGPL-3.0
Suprascribe
Open-source subscription tracker for recurring billing
Stars10Last commit17d agoLicenseAGPL-3.0
LearnHouse
Open-source learning platform to create and sell courses
Stars2,205Last commit13d agoLicenseAGPL-3.0Webiny
Open-source AI-programmable headless CMS
Stars8,032Last commit10d agoLicenseOpen Source
Pluton
Open-source self-hosted backup with end-to-end encryption
Stars753Last commit28d agoLicenseApache-2.0
Memos
Open-source self-hosted note-taking tool
Stars62,583Last commit11d agoLicenseMIT
Ueli
Cross-platform keystroke launcher
Stars4,585Last commit17d agoLicenseMIT
Saleor
Open source headless ecommerce platform
Stars23,266Last commit11d agoLicenseBSD-3-Clause
Operately
Open source OKR and project management software
Stars543Last commit10d agoLicenseOpen Source
OpenBB
Build your own financial workspace
Stars72,360Last commit1mo agoLicenseOpen SourceMidday
All-in-one business stack for modern founders
Stars14,927Last commit2mo agoLicenseAGPL-3.0LocalSend
Open-source cross-platform file sharing tool
Stars89,489Last commit14d agoLicenseApache-2.0
Easy!Appointments
Self-hosted appointment scheduling software
Stars4,341Last commit1mo agoLicenseGPL-3.0Deta Surf
AI-powered notebook for organizing web and file research
Stars3,542Last commit3mo agoLicenseApache-2.0CopilotKit
Enterprise-ready frontend stack for AI agents
Stars37,068Last commit10d agoLicenseMIT
