Escape SaaS Lock-In: Building a Custom Newsletter Engine with n8n and Gemini

As SaaS newsletter platforms impose rising subscription fees and limit customization, this article demonstrates how developers can build a fully self-hosted alternative using n8n workflows, Gemini AI, and Supabase. The guide covers critical security considerations like CORS configuration, XSS prevention in email templates, and token management, making it practical for anyone seeking data ownership without platform dependencies. For small to medium lists, self-hosting can reduce costs to nearly zero while providing complete design control.