battles / Subscriptions
Firmhouse vs PayWhirl
Firmhouse ($250/mo/mo, vibe code 5/10) vs PayWhirl ($149/mo/mo, vibe code 6/10). PayWhirl is the easier one to rebuild yourself — here is what you lose either way.
Subscriptions
$250/mo/mo
- MVP
- 2 weeks
- Full replacement
- 6-12 months due to payment gateway tokenization, SEPA direct debit workflows, and rental return logic
Subscriptions
$149/mo/mo
- MVP
- 1-2 weeks
- Full replacement
- 3-6 months, due to complex dunning edge cases, gateway tokenization, and Shopify Selling Plans API maintenance
easier to rebuild
get the build prompt →price gap / year
$1,212/mo
running both / year
$4,788/mo
our call
Start with PayWhirl — highest vibe code, weakest moat.
Firmhouse
While basic recurring checkout can be hacked together with Stripe Billing in a few days, Firmhouse handles complex EU payment methods (iDEAL to SEPA Direct Debit transitions), dunning, product swaps, and rental asset states. Rebuilding the billing cron jobs is easy; handling failed payment retries, mandate regulations, and payment gateway token migrations without churn is hard.
you can rebuild
- Hosted customer self-serve portal for pausing or skipping orders
- Basic recurring billing schedule creation and calendar management
- Product swap and frequency update controls
- Email notifications for upcoming charges and renewal receipts
- Discount code application for recurring orders
what you lose
- Out-of-the-box iDEAL-to-SEPA Direct Debit payment conversion flows
- Battle-tested automated dunning workflows designed for EU banking rules
- Pre-built Shopify subscription checkout widgets and portal embedding
- Rental lifecycle management tracking asset returns and maintenance statuses
- Zero-maintenance payment gateway token synchronization across providers
real moats
- Payment Gateway Token Lock-in (migrating Stripe/Mollie recurring tokens carries card churn risk)
- EU Regulatory & Banking Edge Cases (SEPA mandate timing, pre-notifications, GDPR audit logs)
- Operational Integrations (syncing recurring orders into 3PL fulfillment systems reliably)
open source escape hatches
- Lago AGPL-3.0
- Kill Bill Apache-2.0
- Active Merchant / Pay MIT
PayWhirl
If running a custom application using Stripe, PayWhirl is redundant because Stripe Billing handles subscriptions natively. If running on Shopify, PayWhirl provides turnkey integration with Shopify's Subscription Contracts API, which requires significant plumbing to recreate safely.
you can rebuild
- Customer portal for skipping, pausing, or canceling subscriptions
- Recurring billing schedule generator
- Product swap and frequency adjustment UI
- Transactional payment reminder emails
- Order generation on successful payment cycles
what you lose
- Zero-code setup for non-technical store managers
- Turnkey alignment with Shopify's native Selling Plans API
- Multi-gateway fallback and vaulting infrastructure
- Pre-built PCI-compliant payment widget embeds
- Out-of-the-box dunning workflow configuration and retry logic
real moats
- Deep platform API integration maintenance (e.g. Shopify GraphQL changes)
- Payment gateway vaulting abstraction
- Turnkey compliance with customer-facing subscription governance regulations
open source escape hatches
- Lago AGPL-3.0
- Kill Bill Apache-2.0
- Stripe Billing + Custom Portal MIT
Questions people ask
Which is easier to rebuild with AI, Firmhouse or PayWhirl?
PayWhirl. It scores 6/10 on vibe code with a moat of 3/10, so an AI-assisted MVP takes about 1-2 weeks and a full replacement about 3-6 months, due to complex dunning edge cases, gateway tokenization, and Shopify Selling Plans API maintenance.
Which one costs less, Firmhouse or PayWhirl?
PayWhirl at $149/mo/mo for a typical mid-market store. The gap between the two is about $1,212/mo a year.
What do I lose if I replace Firmhouse?
Out-of-the-box iDEAL-to-SEPA Direct Debit payment conversion flows Battle-tested automated dunning workflows designed for EU banking rules Pre-built Shopify subscription checkout widgets and portal embedding
What do I lose if I replace PayWhirl?
Zero-code setup for non-technical store managers Turnkey alignment with Shopify's native Selling Plans API Multi-gateway fallback and vaulting infrastructure
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