For recurring-revenue businesses under $500K ARR, Stripe Billing + a lightweight Next.js frontend ($50-$200/mo platform cost) is always the right answer. Chargebee or Recurly pays off for $5M-$50M ARR with complex plans (usage-based, tiered seats, multi-currency). Custom builds win for subscription boxes, membership clubs, and niche-vertical recurring products above $10M ARR — break-even vs Chargebee lifetime cost is typically month 22-30. Above $50M ARR, custom + Stripe Billing + in-house dunning almost always wins; Chargebee's revenue-share pricing crosses ugly at scale. Passive-churn recovery alone can swing LTV by 8-15%.