battles / Fraud
FraudBlock vs Subuno
FraudBlock ($29/mo/mo, vibe code 9/10) vs Subuno ($149/mo/mo, vibe code 6/10). FraudBlock is the easier one to rebuild yourself — here is what you lose either way.
Fraud
$29/mo/mo
- MVP
- 1 afternoon
- Full replacement
- 3 days, including retry queues and notification customizer
easier to rebuild
get the build prompt →Fraud
$149/mo/mo
- MVP
- 1 week
- Full replacement
- 6-12 months, due to third-party API integration maintenance and continuous rule optimization
price gap / year
$1,440/mo
running both / year
$2,136/mo
our call
Start with FraudBlock — highest vibe code, weakest moat.
FraudBlock
FraudBlock does not calculate fraud risk itself; it acts on Shopify's native order risk assessment. Rebuilding it requires a single serverless webhook handler that checks order risk levels and invokes the Shopify API to void, cancel, and restock.
you can rebuild
- Automatic cancellation of High Risk orders flagged by Shopify
- Automatic inventory restocking for cancelled orders
- Customer email notification suppression or customization on cancel
- Payment authorization voiding and refund triggering
- Custom whitelist/blacklist rules for customer emails or IP addresses
what you lose
- Turnkey Shopify App Store single-click installation
- Pre-built embedded UI inside Shopify Admin
- Managed serverless infrastructure maintenance and webhook listener uptime
- Off-the-shelf audit log for cancelled orders
- No-code toggle for inventory restock rules
real moats
- Shopify App Store distribution friction
- Extremely low price point making dev effort debatable for tiny stores
Subuno
Subuno's underlying tech is an IF/THEN rules engine connected to third-party identity/risk lookup services. Rebuilding the UI and rule execution in Node.js is trivial, but maintaining contracts, schema mappings, and API keys for a dozen external fraud vendors is not worth the overhead for most merchants.
you can rebuild
- Custom IF/THEN rule engine for flagging high-risk orders
- Manual order review queue with approve/reject actions
- Email alerts and webhook triggers for flagged transactions
- Basic IP geolocation and address verification (AVS) checks
- Custom merchant-defined whitelists and blacklists
what you lose
- Pre-integrated access to 15+ external fraud data providers
- Unified billing and unified payload normalization across third-party identity APIs
- Cross-merchant shared bad-actor detection network
- Zero-maintenance e-commerce store platform plugins
- Turnkey automated order status updating in connected store platforms
real moats
- Aggregated integration maintenance across a broad mesh of specialized risk APIs
- Cross-merchant shared blacklists and fraud signal history
- Low subscription fee relative to managing multi-vendor API overhead directly
open source escape hatches
- json-rules-engine MIT
- Ruru MIT
- Activepieces MIT
Questions people ask
Which is easier to rebuild with AI, FraudBlock or Subuno?
FraudBlock. It scores 9/10 on vibe code with a moat of 0/10, so an AI-assisted MVP takes about 1 afternoon and a full replacement about 3 days, including retry queues and notification customizer.
Which one costs less, FraudBlock or Subuno?
FraudBlock at $29/mo/mo for a typical mid-market store. The gap between the two is about $1,440/mo a year.
What do I lose if I replace FraudBlock?
Turnkey Shopify App Store single-click installation Pre-built embedded UI inside Shopify Admin Managed serverless infrastructure maintenance and webhook listener uptime
What do I lose if I replace Subuno?
Pre-integrated access to 15+ external fraud data providers Unified billing and unified payload normalization across third-party identity APIs Cross-merchant shared bad-actor detection network
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