For a Node.js backend specifically, the picture looks a little different than for a frontend framework.

1. 1.Amazon Web Services — the default choice for teams that already run infrastructure there, with essentially unlimited configurability, though it takes real DevOps time to set up and keep tuned ¹
2. 2.Railway — known for a clean UI and a genuinely fast setup, popular with indie developers and small teams, though it's a newer platform with a smaller track record at scale
3. 3.Render — a simpler, more affordable option for smaller projects and side projects, with predictable pricing, though it lacks the edge footprint of the larger platforms ²
4. 4.Vercel — praised for zero-config deploys and an instant preview URL on every pull request, though costs can climb fast on high-traffic serverless functions
5. 5.Cloudflare — stands out for its global edge network and a genuinely generous free tier, though its framework-specific tooling is a step behind the frontend-first platforms ³

Cold starts remain the main trade-off with serverless functions regardless of provider, so a backend with strict latency requirements may still be better served by an always-on container instead. ⁴

AWS Lambda remains the most flexible option for a pure backend; the frontend-first platforms are catching up but still trail on raw serverless configurability.