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Fly.io vs Railway

Monthly hosting costs for typical app profiles — computed with the same recommendation engine as StackPlan stack reports. Assumes balanced budget and ops preferences unless noted.

Pricing data:Fly.io · updated Jun 2025Railway · updated Jun 2025

Web app

MetricFly.ioRailway
Cost at 1k DAU$32.10/mo$28.25/mo
Cost at 100 DAU$5.95/mo$6.25/mo
Cost at 1K DAU$32.10/mo$28.25/mo
Cost at 10K DAU$190.95/mo$248/mo
Cost at 100K DAU$1782.20/mo$2460.25/mo
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Railway · App Service · Hobby
  • Railway · Postgres · Pro
Fit score78/10092/100
Verdict: It flips at scale: Railway cheaper at 1k DAU, Fly.io at 100k.

SaaS product

MetricFly.ioRailway
Cost at 1k DAU$32.50/moNot a fit for this app type
Cost at 100 DAU$5.95/moNot a fit for this app type
Cost at 1K DAU$32.50/moNot a fit for this app type
Cost at 10K DAU$196.55/moNot a fit for this app type
Cost at 100K DAU$1841.80/moNot a fit for this app type
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Cloudflare · Queues · Paid
  • AWS (serverless) · EventBridge Scheduler · Free
Not a fit for this app type
Fit score57/100—
Verdict: Fly.io is the only viable option for this app type.

E-commerce store

MetricFly.ioRailway
Cost at 1k DAU$37.06/moNot a fit for this app type
Cost at 100 DAU$6.45/moNot a fit for this app type
Cost at 1K DAU$37.06/moNot a fit for this app type
Cost at 10K DAU$240.49/moNot a fit for this app type
Cost at 100K DAU$2277.52/moNot a fit for this app type
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Fly.io · Tigris · Standard
Not a fit for this app type
Fit score86/100—
Verdict: Fly.io is the only viable option for this app type.

API / backend service

MetricFly.ioRailway
Cost at 1k DAU$32.10/mo$28.25/mo
Cost at 100 DAU$5.95/mo$6.25/mo
Cost at 1K DAU$32.10/mo$28.25/mo
Cost at 10K DAU$190.95/mo$248/mo
Cost at 100K DAU$1782.20/mo$2460.25/mo
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Railway · App Service · Hobby
  • Railway · Postgres · Pro
Fit score88/10092/100
Verdict: It flips at scale: Railway cheaper at 1k DAU, Fly.io at 100k.

Mobile app backend

MetricFly.ioRailway
Cost at 1k DAU$37.06/moNot a fit for this app type
Cost at 100 DAU$6.45/moNot a fit for this app type
Cost at 1K DAU$37.06/moNot a fit for this app type
Cost at 10K DAU$240.49/moNot a fit for this app type
Cost at 100K DAU$2277.52/moNot a fit for this app type
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Fly.io · Tigris · Standard
Not a fit for this app type
Fit score96/100—
Verdict: Fly.io is the only viable option for this app type.

Realtime / collaborative

MetricFly.ioRailway
Cost at 1k DAU$32.10/mo$28.25/mo
Cost at 100 DAU$5.95/mo$6.25/mo
Cost at 1K DAU$32.10/mo$28.25/mo
Cost at 10K DAU$190.95/mo$248/mo
Cost at 100K DAU$1782.20/mo$2460.25/mo
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Railway · App Service · Hobby
  • Railway · Postgres · Pro
Fit score87/10093/100
Verdict: It flips at scale: Railway cheaper at 1k DAU, Fly.io at 100k.

Jobs & pipelines

MetricFly.ioRailway
Cost at 1k DAU$32.50/moNot a fit for this app type
Cost at 100 DAU$5.95/moNot a fit for this app type
Cost at 1K DAU$32.50/moNot a fit for this app type
Cost at 10K DAU$196.55/moNot a fit for this app type
Cost at 100K DAU$1841.80/moNot a fit for this app type
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Cloudflare · Queues · Paid
  • AWS (serverless) · EventBridge Scheduler · Free
Not a fit for this app type
Fit score67/100—
Verdict: Fly.io is the only viable option for this app type.

AI app

MetricFly.ioRailway
Cost at 1k DAU$37.06/moNot a fit for this app type
Cost at 100 DAU$6.45/moNot a fit for this app type
Cost at 1K DAU$37.06/moNot a fit for this app type
Cost at 10K DAU$240.49/moNot a fit for this app type
Cost at 100K DAU$2277.52/moNot a fit for this app type
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Fly.io · Tigris · Standard
Not a fit for this app type
Fit score86/100—
Verdict: Fly.io is the only viable option for this app type.

Internal tool

MetricFly.ioRailway
Cost at 1k DAU$32.10/mo$28.25/mo
Cost at 100 DAU$5.95/mo$6.25/mo
Cost at 1K DAU$32.10/mo$28.25/mo
Cost at 10K DAU$190.95/mo$248/mo
Cost at 100K DAU$1782.20/mo$2460.25/mo
Services used
  • Fly.io · Machines · Shared CPU 1x
  • Fly.io · Postgres · Standard
  • Railway · App Service · Hobby
  • Railway · Postgres · Pro
Fit score78/10092/100
Verdict: It flips at scale: Railway cheaper at 1k DAU, Fly.io at 100k.

These numbers assume a typical profile

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