Migrating a SaaS from PayPal to Stripe — without losing a single subscription.
Challenge
PayPal subscription billing was costing 40% more than Stripe and had no native support for proration, plan changes, or modern checkout. The catch: 12,000 active subscribers couldn't be re-authorized — billing had to migrate silently.
What we built
We ran PayPal and Stripe in parallel for 30 days, used Stripe's PayPal Billing Agreement Migration tool for eligible customers, and built a one-time email + grace period flow for the remainder. Built a full Stripe Customer Portal in 5 days.
Outcome
- →0 subscribers lost during migration
- →₹38L/year saved on transaction fees
- →Plan-change conversion up 23% post-portal