The original title is about migrating from à-la-carte feature gating to plans-only billing in a SaaS. Let me rewrite this for a mobile feed.

Short summary

This article walks through migrating a SaaS from à-la-carte feature subscriptions to a plans-only billing model using a four-phase expand/migrate/contract approach. Each phase (seed plans, gate on plans, backfill orgs, delete old machinery) is independently deployable so nothing breaks mid-flight. The key lesson: treat domain-model migrations like schema migrations—one safe step at a time rather than a big-bang swap.

• •Migrated SaaS billing from per-feature subscriptions to plan-based tiers in four ordered phases
• •Used expand/contract pattern: seed new model, switch reads, backfill data, then remove old code
• •Each phase is independently deployable, avoiding billing outages during migration

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