FireHydrant vs Fly.io
Compare FireHydrant and Fly.io on features, pricing, and buyer fit using the same researched criteria.

FireHydrant
Incident response — Free up to 10 responders; Pro $25/responder/mo annual; Enterprise custom; 14-day Pro trial. Does not outrank PagerDuty 8.0.
Best for
- • Teams that want incident command with a 10-responder free path
- • Buyers comparing FireHydrant Pro $25 to Rootly $20 and incident.io Team $15
- • Orgs that will keep PagerDuty for paging and add FireHydrant for command
Starting from $25.00/user/mo
Free plan available
VS
Our verdict
No universal winner. Choose based on which criteria matter most for your team.
FireHydrant is better for
- ✓ Free plan
Fly.io is better for
- ✓ Starting pricing
Tie
- • Integrations
- • Security & admin
Choose FireHydrant if: Teams that want incident command with a 10-responder free path
Choose Fly.io if: Teams that want PAYG microVM/app hosting close to users

Fly.io
Cloud PaaS / microVM app platform — PAYG; shared-cpu-1x from ~$1.94/mo in lower-cost regions. Support Standard $29/mo is support, not hosting. Does not outrank Render 7.9.
Best for
- • Teams that want PAYG microVM/app hosting close to users
- • Buyers comparing Fly.io $1.94 shared-cpu-1x to Render Pro $25 + compute
- • Orgs that will not treat $29 Support as the hosting SKU
Starting from $1.94/user/mo
No free plan
Comparison scorecard
Criterion-by-criterion results for FireHydrant and Fly.io. Numeric bars appear only when both products have approved scores.
- Fly.io
Starting pricing
Published floor price and what that floor actually includes.
Fly.io publishes a lower researched starting floor ($1.94/mo vs $25/mo for FireHydrant). Confirm currency, renewals, and add-ons — not a total TCO winner.
FireHydrantWeakerFly.ioStronger - FireHydrant
Free plan
Whether a usable free plan is published, and what it gates.
FireHydrant researches a free plan; Fly.io does not research a free plan.
FireHydrantStrongerFly.ioWeaker - Depends
User / licence minimum
Seat floors, per-employee minimums, and small-team pricing traps.
Check seat, agent, or licence minimums for FireHydrant and Fly.io on current vendor packaging.
FireHydrantDependsFly.ioDepends - Tie
Integrations
Important third-party integrations.
FireHydrant and Fly.io are close on integrations (8/10 vs 8/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
FireHydrant8/10Fly.io8/10 - Tie
Security & admin
Admin controls, access, compliance posture, and security packaging.
FireHydrant and Fly.io are close on security admin (7/10 vs 7/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
FireHydrantTieFly.ioTie
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