Fly.io is the serious choice when you need long-running containers on globally distributed VMs, and you've outgrown serverless cold-start economics. The platform's "Machines" model, Docker containers that boot in seconds and bill per second, is the cleanest container-as-a-primitive in this category. The trade is real: Fly deprecated free hosting in 2024, and the per-second pay-as-you-go model can be hard to predict without the calculator. Default pick for stateful backends and global Postgres; less of a fit for static-frontend-only workflows.
- Per-second billing on Docker-based "Machines"
- 30+ regions globally, deploy close to users with one command
- Managed Postgres with read replicas across regions
- Run anything that boots in Docker, no platform lock-in
- Reserved Machines option for 40% discount on always-on workloads
- No free tier for new signups since 2024, 2 VM hours / 7-day trial only
- Pay-as-you-go pricing harder to predict than fixed tiers
- Managed Postgres starts at $38/month, pricier than competitors
- Support starts at $29/month (Compliance package at $99/month)
- Less polished framework integrations than Vercel/Netlify for frontends
Fly.io runs Docker containers as “Machines”, micro-VMs that boot in seconds, scale to zero, and bill per second of actual use. The 2026 product is a pay-as-you-go container platform with 30+ global regions, managed Postgres, and persistent volumes. It’s the right shape for backends that need real CPU and stateful workloads.
Where it fits
Fly is the right pick when you need long-running processes, WebSockets, real CPU time, or globally distributed databases, and serverless cold-start economics don’t fit. The Machines model maps cleanly to “Docker container that boots in a second, runs as long as it needs to, and bills by the second.” For Postgres specifically, the managed-Postgres + read-replicas-across-regions story is unusually strong.
It’s a poor fit for static-frontend-only workflows, Vercel, Netlify, or Cloudflare Pages will be simpler, cheaper, and faster to set up. Fly’s wedge is “real containers, real CPU, real global distribution”, pay for those, you get them; if you don’t need them, choose a higher-level platform.
Pricing in practice
Fly deprecated its Hobby/Launch/Scale plans in 2024 and no longer offers free hosting to new signups, new users get a 2 VM-hour or 7-day trial, whichever comes first. Compute starts at roughly $0.0027/hour for a shared-CPU-1x 256MB instance, a minimal always-on app runs about $1.94/month. Managed Postgres starts at $38/month. Reserved Machines offer 40% off for always-on workloads. Support starts at $29/month; a compliance package is $99/month. The lack of fixed tiers means cost modeling needs the pricing calculator before committing to production scale.
How it compares
Railway, Closest peer: container-friendly PaaS with template deploys. Railway has a usable Hobby tier at $5/mo and stronger DX for non-Docker workflows. Pick Railway when DX matters more than global distribution.
Render, Full-stack PaaS with Postgres, cron, workers. Pick when you want a managed full-stack platform rather than container primitives.
Cloudflare, Edge-first compute with Workers + Containers (beta). Pick when global edge presence matters more than long-running container time.
Vercel, Frontend cloud with serverless functions. Pick for frontend-first stacks where container compute isn’t the wedge.
What changed recently
The biggest 2024–2026 shift was the deprecation of free hobby hosting, new signups get a minimal trial, not a free tier. Existing customers on legacy plans retain their old allowances until they migrate. The platform leaned into the “no plans, just usage” pricing story in 2026, with the calculator becoming the primary cost-modeling tool. Reserved Machines (40% discount for always-on workloads) became the standard way to optimize cost for production deployments. GPU support continued to expand for inference and training workloads. The platform stayed focused on the container + global-distribution wedge rather than chasing the frontend-cloud positioning.
Sources
- Fly.io Pricing, fly.io, May 2026
- Fly.io Resource Pricing Docs, fly.io
- Fly.io Pricing Calculator, fly.io
- Fly.io Pricing 2026 breakdown, costbench.com
- Fly.io Free Tier 2026 status, saaspricepulse.com