battles / Checkout
FastSpring vs Rokt
FastSpring ($750/mo/mo, vibe code 3/10) vs Rokt ($2,500/mo/mo, vibe code 5/10). FastSpring is the easier one to rebuild yourself — here is what you lose either way.
Checkout
$750/mo/mo
- MVP
- 2 weeks
- Full replacement
- Never (Requires global tax entities, banking rails, legal indemnification)
easier to rebuild
get the build prompt →Checkout
$2,500/mo/mo
- MVP
- 3 days
- Full replacement
- Never — requires a two-sided advertising sales network
price gap / year
$21,000/mo
running both / year
$39,000/mo
our call
Start with FastSpring — highest vibe code, weakest moat.
FastSpring
FastSpring is not just checkout software; it assumes legal and financial liability as the Merchant of Record. Rebuilding the checkout UI in React is trivial, but self-hosting global VAT/GST compliance, localized payment acquirers, and fraud liability requires massive legal infrastructure.
you can rebuild
- Embeddable checkout UI modal and hosted payment pages
- Basic subscription management and recurring billing webhooks
- License key generation and digital file fulfillment triggers
- Customer portal for invoice downloads and subscription cancellations
- Multi-currency storefront price conversion displays
what you lose
- Merchant of Record legal status and cross-border indirect tax liability assumption
- Automated VAT/GST calculation, collection, and filing across 200+ global jurisdictions
- Global payment gateway routing, localized payment methods (iDEAL, Pix, Alipay), and acquirer optimization
- Merchant-level chargeback and fraud liability protection
- Payer of record status handling international currency conversion payouts
real moats
- Global legal and tax registration network with local tax authority filings
- Underwritten acquiring bank relationships and payment processing infrastructure
- Financial liability indemnification for chargebacks, VAT audits, and sanctions checks
open source escape hatches
- Kill Bill Apache-2.0
- Lago AGPL-3.0
- Hyperswitch Apache-2.0
Rokt
Building a post-purchase offer iframe takes a weekend using AI coding assistants. However, Rokt's primary asset is a two-sided marketplace of enterprise advertisers (e.g., HelloFresh, Disney+) buying placement space. Without an ad-sales team and thousands of active media buyers, a self-built clone will display empty containers.
you can rebuild
- Post-purchase thank-you page widget rendering
- Rule-based first-party product cross-sell logic
- Basic customer segmentation based on order total and product tags
- Conversion and click-through analytics tracking
- A/B testing layout variations for offer placements
what you lose
- Access to a closed network of thousands of high-paying enterprise advertisers
- Machine learning models trained on billions of transaction events for offer matching
- Privacy-compliant customer data matching and identity resolution
- Automated real-time yield optimization and ad auction bidding engines
- Turnkey ad compliance monitoring, creative moderation, and payout settlement
real moats
- Two-sided network effects between high-volume merchants and enterprise advertisers
- Massive proprietary transaction dataset used for predictive conversion modeling
- Dedicated ad-sales organization and enterprise media agency relationships
open source escape hatches
- Revive Adserver GPL-2.0
- Unleash Apache-2.0
- PostHog MIT
Questions people ask
Which is easier to rebuild with AI, FastSpring or Rokt?
FastSpring. It scores 3/10 on vibe code with a moat of 5/10, so an AI-assisted MVP takes about 2 weeks and a full replacement about Never (Requires global tax entities, banking rails, legal indemnification).
Which one costs less, FastSpring or Rokt?
FastSpring at $750/mo/mo for a typical mid-market store. The gap between the two is about $21,000/mo a year.
What do I lose if I replace FastSpring?
Merchant of Record legal status and cross-border indirect tax liability assumption Automated VAT/GST calculation, collection, and filing across 200+ global jurisdictions Global payment gateway routing, localized payment methods (iDEAL, Pix, Alipay), and acquirer optimization
What do I lose if I replace Rokt?
Access to a closed network of thousands of high-paying enterprise advertisers Machine learning models trained on billions of transaction events for offer matching Privacy-compliant customer data matching and identity resolution
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