battles / Platforms
Solidus vs Swell
Solidus (usage-based/mo, vibe code 6/10) vs Swell ($599/mo/mo, vibe code 5/10). Solidus is the easier one to rebuild yourself — here is what you lose either way.
Platforms
usage-based/mo
- MVP
- 2 weeks
- Full replacement
- 8-14 months
easier to rebuild
get the build prompt →Platforms
$599/mo/mo
- MVP
- 2-3 weeks
- Full replacement
- 9-15 months
price gap / year
$7,188/mo
running both / year
$7,188/mo
our call
Start with Solidus — highest vibe code, weakest moat.
Solidus
There is no licence to escape. Rebuilding makes sense only if you want to leave Ruby; otherwise you are trading a maintained core for a bespoke one.
you can rebuild
- Catalog, variants and option types
- Cart, checkout and order state machine
- Promotions with basic rules and actions
- Admin interface for orders and products
what you lose
- A maintained upgrade path with a security-conscious core team
- Rails extensions for payments, taxes and reporting
- Free bug fixes from other people's production incidents
real moats
- An active maintainer community absorbing edge cases you have not hit yet
open source escape hatches
- spree/spree BSD-3
- medusajs/medusa MIT
- saleor/saleor BSD-3
Swell
A headless commerce API is a well-understood build. What Swell sells is not having to run it: uptime, dashboard, subscription billing and payment plumbing maintained by someone else.
you can rebuild
- Products, variants and pricing rules via API
- Cart, checkout session and order APIs
- Customer accounts and saved payment methods
- Webhook events for downstream systems
- A basic merchant dashboard
what you lose
- A maintained subscription billing engine with retries and dunning
- Hosted uptime and scaling during traffic spikes
- Prebuilt payment, tax and shipping integrations
- A dashboard non-developers can operate
real moats
- Maintained integrations across payments, tax and shipping
- Subscription billing correctness accumulated across merchants
- Operational reliability you would otherwise staff for
Questions people ask
Which is easier to rebuild with AI, Solidus or Swell?
Solidus. It scores 6/10 on vibe code with a moat of 2/10, so an AI-assisted MVP takes about 2 weeks and a full replacement about 8-14 months.
Which one costs less, Solidus or Swell?
Solidus at usage-based/mo for a typical mid-market store. The gap between the two is about $7,188/mo a year.
What do I lose if I replace Solidus?
A maintained upgrade path with a security-conscious core team Rails extensions for payments, taxes and reporting Free bug fixes from other people's production incidents
What do I lose if I replace Swell?
A maintained subscription billing engine with retries and dunning Hosted uptime and scaling during traffic spikes Prebuilt payment, tax and shipping integrations
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