battles / Subscriptions
Firmhouse vs Seal Subscriptions
Firmhouse ($250/mo/mo, vibe code 5/10) vs Seal Subscriptions ($20/mo/mo, vibe code 5/10). Seal Subscriptions 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
$20/mo/mo
- MVP
- 2 weeks
- Full replacement
- 6-9 months, due to edge-case dunning, inventory checks, and Shopify API updates
easier to rebuild
get the build prompt →price gap / year
$2,760/mo
running both / year
$3,240/mo
our call
Start with Seal Subscriptions — 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
Seal Subscriptions
Shopify handles actual credit card vaulting via its Subscription API, making Seal primarily a UI overlay, webhook handler, and customer portal. However, handling dunning, product swaps, discount logic, and API edge cases for $8-$20/month is not worth custom engineering overhead.
you can rebuild
- Shopify Selling Plan creation and catalog assignment
- Basic customer self-service portal (pause, resume, cancel)
- Recurring order discount configurations (e.g., 10% off recurring)
- Automated renewal notification emails
- Delivery interval schedule definitions
what you lose
- Out-of-the-box product swapping inside the subscriber portal
- Automated dunning retries and card update flows
- Turnkey subscriber migration import/export tools
- Pre-built integrations with email providers like Klaviyo and Omnisend
- Multi-language customer portal translation management
real moats
- Deep abstraction over Shopify Admin GraphQL Subscription API updates
- Turnkey migration utilities for switching between subscription apps
- Established integrations with page builders and marketing stacks
open source escape hatches
- Lago AGPL-3.0
- Kill Bill Apache-2.0
- Invoice Ninja AAL
Questions people ask
Which is easier to rebuild with AI, Firmhouse or Seal Subscriptions?
Seal Subscriptions. It scores 5/10 on vibe code with a moat of 2/10, so an AI-assisted MVP takes about 2 weeks and a full replacement about 6-9 months, due to edge-case dunning, inventory checks, and Shopify API updates.
Which one costs less, Firmhouse or Seal Subscriptions?
Seal Subscriptions at $20/mo/mo for a typical mid-market store. The gap between the two is about $2,760/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 Seal Subscriptions?
Out-of-the-box product swapping inside the subscriber portal Automated dunning retries and card update flows Turnkey subscriber migration import/export tools
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