Fly.io
Low RiskRun full-stack apps and Docker containers globally close to your users
Starting Price $0 Free Allowance | Pay-as-you-go from $1.94/mo per VM Micro-VM compute seconds + Persistent Volume Storage + Outbound data
Free Tier Reality Free allowance covers small shared-cpu VMs (up to 3 shared-cpu-1x 256MB VMs)
Recommended Best For Elixir/Phoenix apps, SQLite on the edge, low-latency WebSocket backends
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Hidden Fees & Overage Traps to Watch Out For
Real situations where founders report unexpected bills from Fly.io.
01
Requires credit card entry to activate account even for free allowance
02
Persistent volumes cannot be easily resized downward without migration
03
Dedicated IPv4 addresses cost $2/mo extra (IPv6 is free)
✓ Why Founders Choose Fly.io
- ✓ Run apps physically close to users in 30+ edge regions
- ✓ Deploy any Docker container seamlessly
- ✓ True scale-to-zero capability with fast resume
✕ Real Drawbacks & Limitations
- ✕ CLI-centric workflow without a beginner-friendly GUI
- ✕ Storage volume management requires terminal skill
Compare Cheaper Alternatives to Fly.io
Side-by-side cost comparisons with direct competitors.
Railway
$5/mo Hobby | $20/mo Pro + UsageInstant infrastructure platform to deploy full-stack apps, Docker containers, and databases
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Render
$0 Free | $7/mo Starter Web ServiceModern cloud alternative to Heroku for web apps, background workers, and Postgres
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DigitalOcean App Platform & Droplets
$4/mo Droplet | $5/mo Basic App PlatformSimple cloud infrastructure and managed Kubernetes for growing developers
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