Coolify is open source and self-hosted: you point it at a server you own, and it deploys your [Docker](/entry/docker-desktop-vs-podman-vs-rancher-desktop-is-the-docker-tax-worth-paying-2026) apps with a Heroku-like experience. You can run 20+ small apps on one $10/month [Hetzner](/entry/cheapest-vps-in-2026-hetzner-vs-digitalocean-vs-vultr-vs-linode) box and pay nothing beyond the VPS. Railway and Render are the opposite deal — the vendor runs everything and bills you for what your apps consume.
| Model | Cost | You are on call for | |
|---|---|---|---|
| Coolify | self-hosted, open source | ~$10/mo VPS, unlimited apps | patching, backups, incidents |
| Railway | vendor-managed, usage-based | Hobby $5/mo, Pro $20/mo (+$20 credit) | nothing |
| Render | vendor-managed, fixed + usage | free tier for static/small, Starter ~$7/mo | nothing |
The trade is stark and worth being honest about. Coolify wins on cost and control — flat VPS pricing, your data, your server. But you patch it, you back it up, and you get paged when it breaks. In January 2026, 11 critical vulnerabilities were disclosed in Coolify, including authentication bypass and remote code execution — a reminder that "self-hosted" means "your security problem." Railway and Render handle all of that; you trade money for not thinking about it.
Railway tends to be cheapest among the managed options for a typical solo-developer workload and has the smoothest deploy flow. Render is more predictable — fixed instance prices, a real free tier for static sites and small services.
If you want maximum cost control, you already run servers, and operational overhead doesn't scare you: Coolify. If you'd rather pay $5–20/month and never think about patching a control plane: Railway for the workflow and price, Render for predictable billing and a genuine free tier.