Fly.io
Deploy full-stack apps and containers globally close to users — run Docker images on hardware in 30+ regions with persistent volumes and Postgres.
Proprietary
Go
Why Fly.io?
Containerized apps that need global distribution and low-latency reads
Apps with persistent state (databases, websockets) that don't fit serverless
Migrating from Heroku with minimal config changes
Signal Breakdown
What drives the Trust Score
Download Trend
Last 12 months
Tradeoffs & Caveats
Know before you commitStatic sites and JAMstack — Vercel or Netlify are simpler and cheaper
Apps that don't need containers or global distribution
Pricing
Free tier & paid plans
Free allowances for small VMs and storage
Pay-as-you-go from ~$2/mo per VM
Alternative Tools
Other options worth considering
Heroku-alternative PaaS that auto-deploys from Git — web services, background workers, cron jobs, and managed PostgreSQL with zero infrastructure.
Frontend cloud platform for deploying static sites, SSR apps, and serverless functions — git-based deployments with branch previews and edge network.
Often Used Together
Complementary tools that pair well with Fly.io
Learning Resources
Docs, videos, tutorials, and courses
Get Started
Repository and installation options
View on GitHub
github.com/superfly/flyctl
curl -L https://fly.io/install.sh | shQuick Start
Copy and adapt to get going fast
# Install flyctl and deploy
curl -L https://fly.io/install.sh | sh
fly auth login
fly launch
# Deploy updates
fly deployCommunity Notes
Real experiences from developers who've used this tool