TL;DR:
Railway is a solid choice for agency demos, pitch builds, and discovery-phase prototypes. It is a weak default for client production workloads.
The shared failure domain, the lack of guaranteed SLAs on standard tiers, the single-volume database limits, and the usage-based billing model all raise the stakes for agencies running multiple client accounts on one platform.
For production work, match the platform to the workload: Vercel, Netlify, or Cloudflare for frontend-heavy sites; Render, Heroku, DigitalOcean App Platform, or Upsun for full-stack and AI apps; Fly.io for region-sensitive workloads; and Northflank, AWS, GCP, or Azure for enterprise and BYOC requirements.
Railway can be tempting for agencies.
