battles / Payments
Gr4vy vs Primer
Gr4vy ($2,500/mo/mo, vibe code 3/10) vs Primer ($1,500/mo/mo, vibe code 3/10). Gr4vy is the easier one to rebuild yourself — here is what you lose either way.
Payments
$2,500/mo/mo
- MVP
- 1 month
- Full replacement
- 12-24 months, due to PCI-DSS Level 1 certification, token vault security, and dozens of payment gateway integrations
easier to rebuild
get the build prompt →Payments
$1,500/mo/mo
- MVP
- 2-3 weeks
- Full replacement
- 12-24 months, due to PCI-DSS Level 1 compliance requirements, universal card vaulting, and maintaining dozens of PSP integrations.
price gap / year
$12,000/mo
running both / year
$48,000/mo
our call
Start with Gr4vy — highest vibe code, weakest moat.
Gr4vy
Building a basic routing engine is straightforward, but replicating a secure, PCI-DSS Level 1 compliant token vault and dozens of gateway integrations requires continuous compliance audits and security overhead. Replacing Gr4vy with custom code introduces massive regulatory liability and integration maintenance burden.
you can rebuild
- Basic conditional payment routing rules engine
- Merchant admin dashboard for transaction monitoring
- Simple failover retry logic between two primary gateways
- Normalized unified checkout API schema
- Transaction metadata logging and analytics
what you lose
- PCI-DSS Level 1 compliant card data tokenization vault
- Out-of-the-box integrations with 50+ payment gateways and APMs
- Automatic 3D Secure 2 (3DS) / SCA step-up authentication handling
- Infrastructure isolation per merchant account
- Continuous API maintenance and compliance updates from payment providers
real moats
- PCI-DSS Level 1 certification and security liability absorption
- Broad pre-built integration catalog with PSPs, buy-now-pay-later (BNPL) providers, and fraud engines
- Universal token vaulting capable of cross-PSP token migration
open source escape hatches
- Hyperswitch Apache-2.0
- Kill Bill Apache-2.0
- Medusa Payment Plugins MIT
Primer
Building basic logic to failover between Stripe and Adyen in Node.js takes a few days. However, Primer provides PCI-DSS Level 1 card vaulting, 3DS2 orchestration, unified tokenization, and dozens of pre-built payment connectors. Replacing Primer with custom code creates massive regulatory and engineering overhead.
you can rebuild
- Basic conditional payment routing (if Gateway A fails, try Gateway B)
- Rule-based PSP selection by buyer currency or country
- Basic payment transaction logging and status dashboard
- Dynamic surcharge calculations based on payment method
- Centralized webhook aggregation for payment status events
what you lose
- PCI-DSS Level 1 compliant card tokenization vault
- Pre-built integrations for 100+ PSPs, BNPLs, and alternative payment methods
- Native 3DS2 (Strong Customer Authentication) flow orchestration across gateways
- No-code visual drag-and-drop payment workflow automation editor
- Unified financial reconciliation and automated payout matching across processors
real moats
- PCI-DSS Level 1 security architecture and ongoing audit compliance
- Universal card vaulting and token format translation between legacy gateways
- Battle-tested maintenance of dozens of volatile payment processor APIs
open source escape hatches
- Hyperswitch Apache-2.0
- Kill Bill Apache-2.0
- Active Merchant MIT
Questions people ask
Which is easier to rebuild with AI, Gr4vy or Primer?
Gr4vy. It scores 3/10 on vibe code with a moat of 6/10, so an AI-assisted MVP takes about 1 month and a full replacement about 12-24 months, due to PCI-DSS Level 1 certification, token vault security, and dozens of payment gateway integrations.
Which one costs less, Gr4vy or Primer?
Primer at $1,500/mo/mo for a typical mid-market store. The gap between the two is about $12,000/mo a year.
What do I lose if I replace Gr4vy?
PCI-DSS Level 1 compliant card data tokenization vault Out-of-the-box integrations with 50+ payment gateways and APMs Automatic 3D Secure 2 (3DS) / SCA step-up authentication handling
What do I lose if I replace Primer?
PCI-DSS Level 1 compliant card tokenization vault Pre-built integrations for 100+ PSPs, BNPLs, and alternative payment methods Native 3DS2 (Strong Customer Authentication) flow orchestration across gateways
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