Migration Guide
Migrate from Heroku to Fly.io
Migrate Heroku dyno workloads to Fly.io machines with regional placement, health checks, and scaling updates.
What you get
Risk assessment
Blockers, warnings, and unknowns ranked by severity
Effort estimate
Hours, t-shirt size, and role breakdown
Cost estimate
Labor, infrastructure, and tooling cost range
Migration steps
Ordered execution plan with durations
Open questions
What still needs to be answered before you start
Draft config or code
Starter configs when the migration path supports it
Why teams migrate from Heroku to Fly.io
Good fit when
- +Teams that need global latency, edge deploys, or per-region control.
- +Apps that can benefit from lightweight VM deployment and Anycast routing.
- +Teams comfortable with more infrastructure nuance in exchange for control.
Strengths
- Excellent multi-region deployments and routing controls.
- Strong performance for edge-forward APIs and real-time services.
- Machines allow low-level configuration when needed.
Tradeoffs
- More operational control required than Render.
- Postgres and volume management require closer attention.
- Learning curve for organization of apps/regions/volumes.
Migration notes
- Translate Procfile to Fly launch and define machines for web/worker.
- Plan volumes explicitly for persistent storage needs.
- Validate health checks and scaling rules per region.
How it works
Describe your migration
Select Heroku as source and Fly.io as target. Add context about your setup — configs, docs, architecture notes.
Keshro runs the analysis
Keshro researches the path, finds similar past migrations, and generates a structured assessment with risks, effort, cost, and steps.
Get your plan
Review the migration plan, refine it with your team, and use it as a living document during execution.
Resources
Related migrations
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