ecomrestack

Can I vibe code Primer?

primer.io ↗·payment-orchestration·$250/mo·quote

KEEP — THE UI ISN'T THE MOAT

You pay Primer for PCI-compliant vaulting, pre-built payment processor SDKs, low-latency transaction routing, and PSD2/3DS2 authentication management. Writing simple conditional rules (e.g., if Stripe fails, send to Checkout.com) is trivial. However, building and certifying a secure token vault, handling multi-PSP 3DS challenge flows, and maintaining API integrations against upstream breaking changes across 50+ financial vendors is an operational nightmare for custom software.

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The verdict

KEEP

Replaces

$1,500/mo

Vibe code score

3/10

MVP build time

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.

Editorial opinion, produced with a published methodology from public information. Not a statement of fact about the vendor. How we score · Report an error · Pricing checked 2026-09-06

Primer

01

Why this verdict

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.

Verdict

KEEP

Vibe code score

3/10

Moat strength

6/10

02

What it really costs

Sticker price versus what a real store ends up paying.

Entry$250/moTypical store$1,500/mo≈ estimated · 2026-09-06
Growth$250/moBase fee plus per-transaction routing charge for scaling stores
Enterprise$1,500/moCustom SLAs, dedicated account manager, advanced routing workflows, and volume rates

Charges a monthly platform infrastructure fee plus volume-based transaction routing fees.

Where this number comes from
Captured
2026-09-06 (18 days ago)
Verified by
crawler
Source
primer.io

Assumptions: Charges a monthly platform infrastructure fee plus volume-based transaction routing fees.

03

The one-shot build prompt

Paste it into your agent of choice. Nothing else needed.

The one-shot build promptbuild it on Lovable
Build a light dual-payment-gateway routing service in Node.js (TypeScript) using Fastify and Prisma with PostgreSQL. 1. DATA MODEL: Schema for PaymentIntent (id, order_id, amount, currency, status, primary_psp, fallback_psp, psp_transaction_id, error_log), GatewayConfig (name, priority, enabled, supported_currencies). 2. GATEWAY CLIENTS: Implement wrapper modules for Stripe and Adyen APIs using official SDKs. Never store or process raw PAN card details; delegate tokenization entirely to processor frontend SDKs. 3. ROUTING ENGINE: Expose endpoint POST /v1/payments/process. Receive payment token, amount, currency, and customer IP. Check active gateways in DB filtered by currency support. Attempt authorization via Primary Gateway (e.g., Stripe). 4. FALLBACK LOGIC: If Primary Gateway returns a 5xx error or network timeout (not hard card declines like insufficient funds), automatically execute retry against Fallback Gateway (e.g., Adyen) within 3 seconds. 5. WEBHOOK RECONCILIATION: Expose POST /v1/webhooks/:psp to ingest asynchronous payment status updates. Standardize payloads into uniform internal states (PENDING, SUCCEEDED, FAILED, REFUNDED) and update PaymentIntent record. 6. FAILURE MODES: Handle race conditions between synchronous API responses and asynchronous webhooks using database record locking. Return clean structured JSON errors to client.

$ each button prefixes agent-specific run instructions · build your own product, never copy proprietary code, trademarks or designs

04

Scorecard

Deterministic scoring, same method for every product.

Vibe code score

3/10

Moat strength

6/10

Technical difficulty8/10
Operational burden8/10
Integration depth9/10
Data advantage3/10
Network effects3/10
Compliance load10/10

05

What you keep, what you lose

The honest trade of rebuilding it yourself.

What you can actually replace

  • ✓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

06

Why people still pay — the real moats

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

Hard parts

  • — Achieving and maintaining PCI-DSS Level 1 compliance if handling raw card data
  • — Normalizing distinct status codes, error payloads, and webhook formats across 10+ PSP APIs
  • — Managing complex 3DS2 challenge flows seamlessly within client-side SDKs across vendors
  • — Ensuring zero data loss and sub-second latency on critical path payment routing DB lookups
  • — Constantly updating custom code when payment gateways update API versions or authentication rules
  • — Managing regulatory compliance requirements across international payment jurisdictions
  • — Handling complex cross-processor refunds, disputes, and chargeback state synchronization
  • — Debugging silent routing failures or dropped transactions without vendor support

Build this instead

Client-Side Dual SDK Switch

Mount both Stripe Elements and Adyen Web SDKs on checkout, switching client-side based on currency without handling raw card data.

Build this instead

Serverless PSP Routing Proxy

A lightweight Node.js lambda function that routes standardized payment payloads to either Gateway A or Gateway B based on rule conditions.

Build this instead

Unified Payment Webhook Aggregator

A centralized Postgres database service that ingests webhooks from Stripe, PayPal, and Adyen to create a single source of truth for order statuses.

07

Prior art — do not start from zero

Existing projects and paid alternatives worth pricing first.

Hyperswitch↗

High-performance open-source payment switch written in Rust by Juspay.

github.com

Kill Bill↗

Open-source billing and payment platform designed for enterprise scale.

github.com

Active Merchant↗

Ruby library maintained by Shopify that unifies payment gateway APIs.

github.com

08

Open source alternatives to Primer

Self-hostable projects that cover most of the same ground. Free licence, your infrastructure, your on-call.

Hyperswitch↗

Apache-2.0

Rust-based open-source payment router and orchestration engine supporting multiple processors.

github.com

Kill Bill↗

Apache-2.0

Enterprise-grade open-source subscription and payment gateway routing system.

github.com

Active Merchant↗

MIT

Extraction from Shopify that provides a uniform interface for dozens of payment gateways.

github.com

09

Have you actually replaced it?

One click, no account. It moves the ranking.

Community verdict

share on X ↗
Successful
0
Failed
0
Success rate
no data yet
Spend killed
$0/mo

10

Compare

Same category, different trade-offs.

AdyenKEEP

Global payment processor and acquiring bank with native omnichannel settlement, 200+ local payment methods, and automated interchange routing.

usage-based

AirwallexKEEP

Airwallex provides multi-currency business accounts, foreign exchange (FX) conversion, international transfers, card issuing, and payment acquiring.

usage-based

BraintreeKEEP

Braintree is a PayPal-owned global payment processor offering merchant accounts, credit card vaulting, and mobile wallet integrations.

usage-based

Primer vs AdyenPrimer vs AirwallexPrimer vs BraintreePrimer vs Checkout.comPrimer vs ClearcoPrimer vs dLocal

11

FAQ

+Can I really replace Primer with an AI-generated app?

NO — PCI-DSS COMPLIANCE AND DOZENS OF PSP INTEGRATIONS MAKE THIS UNREPLACEABLE. 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. An MVP takes roughly 2-3 weeks; matching the product properly is closer to 12-24 months, due to PCI-DSS Level 1 compliance requirements, universal card vaulting, and maintaining dozens of PSP integrations..

+How long does it take to rebuild Primer?

A usable internal version: 2-3 weeks. A version you would sell or bet a business on: 12-24 months, due to PCI-DSS Level 1 compliance requirements, universal card vaulting, and maintaining dozens of PSP integrations., mostly spent on achieving and maintaining pci-dss level 1 compliance if handling raw card data.

+What do you actually lose by leaving 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

+Is it legal to build a Primer alternative?

Building a competing product with your own code is normal competition. Copying their code, trademarks, brand assets or scraping their platform is not. Use the prompt to build your own implementation of common features.

Written by EcomReStack research agent — 18 years in the Magento ecosystem. Last reviewed 2026-09-06.

Sources consulted

Scores are computed, not typed. Read the methodology.

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