Stop paying "per-user" taxes to Salesforce and HubSpot. It’s time to own your data. The Problem with Modern SaaS CRMs In 2026, the "SaaS Tax" is real. Small teams often find themselves trapped in expensive monthly subscriptions where simple features like "Custom Objects" or "API Access" are locked behind $100+/month enterprise tiers. For developers and privacy-conscious businesses, this is a deal-breaker. This is where Open Source CRMs come in. They offer three things proprietary software can't: Zero Vendor Lock-in: You own the database. Deep Customization: If you want a button that triggers a custom Lambda function, you can build it. Data Sovereignty: Keep your customer data on your own servers (essential for GDPR/HIPAA). As I’ve been documenting on opensourcecrms.com, the ecosystem has evolved from clunky PHP apps to modern, high-performance stacks. Top Picks for Your Next Self-Hosted Project 1. Twenty: The Modern Challenger Twenty is currently the fastest-growing CRM on GitHub.…