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Fly.io

Fly.io runs applications as Firecracker microVMs on hardware it operates itself, deployed from a Dockerfile through the flyctl CLI and billed by usage.

fly.iopricing

Fly high.

Fly.io runs applications as Firecracker microVMs, which it calls Machines, on hardware it describes as “servers we run ourselves” spread across regions on several continents. Deployment is a CLI operation: fly deploy builds the app from an explicitly named image, a [build] section in fly.toml or a Dockerfile in the working directory, then starts it on one or more Machines.

Billing is usage-based throughout, pro-rated to the second for compute and to the hour for storage. Compute, volumes, snapshots, bandwidth, dedicated IPv4 addresses and Managed Postgres are each metered on their own line. There is no free tier for new customers; the older hobby allowances are legacy.

Worth knowing

Because the invoice is assembled from those separate meters, what a given application costs is only knowable once it has run.

The platform stops at the machine boundary. Fly manages Machines; the stack inside them — runtime version, extensions, web server configuration and their upgrades — lives in the customer’s own Docker image.

Identity

Reach
↓2,5092
Ownership
VC-backed10
Status
Active
Wikidata
Q1339433181

Deployment

Deployment
Container image9

Regions and law

Regions
United States, Canada, Brazil, United Kingdom, France, Netherlands, Germany, Sweden, South Africa, India, Singapore, Japan, Australia6

Other features

Test domain
Included3
Collaboration
Team members4

Support

Support
Forum8

Automation

CLI
Official9

Sources

  1. 2026-09-09: Wikidata
    www.wikidata.org/wiki/Q133943318
  2. 2026-09-07: Reach
    majestic.com/reports/majestic-million
  3. 2026-08-12: Test domain
    fly.io/docs/networking/custom-domain/
  4. 2026-08-12: Collaboration
    fly.io/docs/security/
  5. 2026-08-01: Starting price, Pricing model, Entry price, Typical ceiling, Currencies, Free tier, Persistent storage, Managed databases
    fly.io/docs/about/pricing/
  6. 2026-07-31: Metal, Regions
    fly.io/docs/reference/regions/
  7. 2026-08-02: Billed, Paid, Exit
    fly.io/docs/about/billing/
  8. 2026-07-31: Support
    fly.io/docs/
  9. 2026-07-31: Deployment, CLI
    fly.io/docs/launch/deploy/
  10. 2026-08-21: Ownership
    fly.io/blog/we-raised-a-bunch-of-money/
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