“The margins is around 80%.”

Run a $17K MRR OSS SaaS at 80% margins on Railway, Vercel, and Cloudflare

A small open-source SaaS can hit 80% margins on Railway + Vercel + Cloudflare R2 + Resend with everything else on OSS-tier free tools. The biggest single line item tends to be AI inference — around $600/month for Postiz — and the rest is small, off-the-shelf, and unfunded.