Zero-Cost Next.js Deployments: Avoiding Hidden Charges in Vercel and Supabase

Free tiers aren't truly free—unexpected costs lurk in bandwidth caps, database connection limits, and automatic project suspension. This hands-on guide exposes the three major pitfalls that catch developers off guard when using Vercel and Supabase, and provides proven solutions like connection pooling, external CDN integration, and automated health checks. For anyone running personal projects or small-scale apps on free tiers, these insights are the difference between sustainable cost savings and surprise bills.