HEAD-TO-HEAD · PRICES VERIFIED 2026-08-27
Self-host Firecracker (Hetzner) vs Fly Machines
Self-host Firecracker (Hetzner) and Fly Machines have no comparable captured rates — both render unranked in our engine, so no computed verdict exists. Compare their published plans directly via each row's source links.
Monthly Cost Across Realistic Benchmarks
Rate Card Snapshot
| Vendor | $/vCPU-hr | $/GiB-hr | Billing granularity | Concurrency note |
|---|---|---|---|---|
| Self-host Firecracker (Hetzner) | — | incl. | — | Bounded only by host capacity — the point of self-hosting. |
| Fly Machines | — | incl. | per-second | — |
Fit Notes
- Self-host Firecracker (Hetzner) — Skip if usage is bursty or spiky — the host bills 24/7 whether sandboxes run or not; below roughly half utilization the managed providers win on total cost and you still own the pager.
- Fly Machines — Skip if you need a single per-vCPU+per-GiB price — Fly sells bundled presets that don’t decompose into our two-axis model; compare preset totals directly.
Self-host Firecracker (Hetzner)
StrengthsFly Machines
StrengthsRun your own workload through the full interactive calculator, or browse all pairs on the comparisons hub.
Frequently Asked Questions
Which is cheaper, Self-host Firecracker (Hetzner) or Fly Machines?
Self-host Firecracker (Hetzner) and Fly Machines have no comparable captured rates — both render unranked in our engine, so no computed verdict exists. Compare their published plans directly via each row's source links.
How were these Self-host Firecracker (Hetzner) vs Fly Machines costs computed?
Both vendors run identical workload profiles (sandbox-hours × vCPU/RAM) through the same engine using each vendor's captured USD list rates; the full methodology is on the agent-sandbox-pricing tool page.