How I beat the "Serverless Tax" using Go and Redis

Derrick — Fri, 30 Jan 2026 14:30:00 +0000

The Problem

I love Vercel and Netlify for side projects. The developer experience is unmatched.

But I hate the "Success Tax."

The moment a side project gets traction, the function invocation limits kick in. You go from the "Free Tier" to "Enterprise Pricing" overnight, often for traffic that isn't even monetized yet.

I didn't want to migrate to Kubernetes, but I didn't want to pay $20/mo per project just to handle a few spikes.

The Solution: A "Poor Man's" Load Balancer

I realized that while one free tier has limits, three free tiers have triple the limits.

I built a lightweight API Gateway called Crate using Go and Redis.

The Architecture

The Gateway: A Go binary running on a cheap bare-metal server (Colocrossing).
The State: Redis is used for distributed rate limiting and analytics tracking.
The Routing: It uses httputil.ReverseProxy with in-memory round-robin logic to split requests across multiple backends.

Instead of pointing my domain to Vercel, I point it to Crate. Crate then splits the traffic:

33% -> Vercel Project A
33% -> Vercel Project B
33% -> Netlify Backup

The Result

I effectively multiplied my free tier limits. I can now handle 3x the traffic without paying a cent in overage fees.

I also use it to run Hybrid Architectures. I split traffic 50/50 between a Serverless Function (for scale) and a fixed-cost VPS (for baseline load). This keeps my bill predictable.

Want to try it?

I'm looking for 10 developers to help me stress-test the Go implementation.

I'm charging $5/mo (locked in for life) just to cover the server costs.