Developers launching multiple landing pages can cut hosting costs by using a shared waitlist backend instead of deploying individual full-stack apps. Rather than paying for separate backends, static sites hosted on Netlify or GitHub Pages can use CORS to send sign-ups to a single backend endpoint. That backend, which can be self-hosted for around $4/month, writes entries directly to Google Sheets—eliminating newsletter service fees.

This approach gives complete control over form behavior and post-submission actions, unlike services like Netlify Forms, which limit customization. The setup uses standard `fetch()` calls and handles cross-origin requests with proper CORS headers. One developer has open-sourced their Java-based waitlist backend on GitHub and currently runs over 10 free landing pages using this method.

It’s a practical, low-cost workaround for indie hackers and startups managing multiple product launches without engineering overhead.