Application portability
App portability is a maintained capability, not a one-time export
A repository export is valuable, but a portable product also needs movable data, understood identity boundaries, reproducible infrastructure, documented secrets and an operating model that survives a provider change.
- Measure portability across code, data and operations
- Document provider-specific assumptions as they appear
- Re-score the application before major launches or renewals
Five layers of real portability
Code portability asks whether the repository builds without a proprietary editor. Runtime portability covers frameworks, functions and deployment assumptions. Data portability includes schema, rows, files and export formats. Identity portability covers users, providers and sessions. Operational portability covers configuration, monitoring, backups and team knowledge.
A weakness in any one layer can dominate the cost and risk of a future move.
Score evidence, not aspiration
A useful portability score is backed by checks: a reproducible build, explicit environment variables, migration files, tested exports, documented callbacks and a destination matrix. Unknowns should lower confidence instead of being silently counted as compatible.
StackFerry produces a provider-neutral assessment and a plan of actions. The score is a decision aid, not a guarantee that a production migration has already been completed.
Keep portability alive after the move
Record infrastructure changes, keep schema migrations current, test backups and avoid putting credentials in ordinary project records. Revisit portability when adding a payment provider, identity system, region, background job or proprietary data feature.
The goal is not constant migration. It is bargaining power, resilience and the ability to choose the next step with known costs.
Frequently asked questions
Is owning the GitHub repository enough?
It is an important start, but the running app may still depend on non-portable data, identity, storage, functions, configuration and operational knowledge.
What does StackFerry's portability score measure?
It assesses repository and service compatibility against explicit destination profiles and identifies actions or unknowns that affect confidence.
Does portability eliminate migration cost?
No. It makes dependencies visible and moves more predictable. Data transfer, cutover and service replacement can still require specialist work.
When should portability be reviewed?
Review it before production launch, major provider commitments and important architecture changes, and after adding services that handle identity or data.
Related guides
Material reviewed 2026-07-14. See StackFerry pricing.