Komo

Fly.io

What tech stack does Fly.io use?

Fly.io's stack is detected from public docs, job postings, product docs, and stack pages. It is directional and should not be treated as a private architecture map.

Frontend
Public signal limited
Backend
Go
Cloud
Public signal limited
Data
Postgres
Critical path
Fly Machines
GTM
Enterprise / PLG

Fly.io detected technology stack

Detected technologies for Fly.io come from public evidence and are grouped by layer.

  • Firecracker· Compute
  • Rust· Infrastructure
  • Go· Backend
  • Elixir/Phoenix· Product
  • WireGuard· Network
  • Docker images· Deployment
  • Postgres· Data
  • CUDA / NVIDIA GPUs· AI infrastructure

Sources:Fly.io stack/business sourceFly.io jobs/docs source

What does Fly.io use on the backend and infrastructure?

Backend and infrastructure signals include Firecracker, Rust, Go, WireGuard, Postgres. These are public directional signals, not a complete internal inventory.

What does Fly.io use on the frontend, data, or GTM tooling?

Frontend, data, and GTM signals include Elixir/Phoenix, Postgres.

What Fly.io's stack means if you sell to them

Vendors should map integrations to the detected stack and avoid displacement claims without confirmed incumbent usage. The strongest pitch is one that improves edge cloud infrastructure reliability, analytics, security, or buyer workflow.

As of June 2026.Sources:Fly.io stack/business sourceFly.io jobs/docs source

Fly.io — frequently asked questions

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