FlexBill Gateway: Composable Order‑to‑Cash Overlay
9/10
Demand Score
Rigid billing blocks monetization changes, causes manual invoicing, revenue leakage, and compliance risk.
8/10
Blue Ocean
Competition Level
$2k-15k
Price/Month
Predicted customer spend
14 days
Time to MVP
Difficulty: Hard
The Problem
A billing ‘gateway’ that sits between CRM/CPQ and your ERP AR, letting finance design versioned pricing, usage, milestones, and complex discount rules without replatforming. Run in shadow mode to comp
🔗 Validated by Real User Complaints
This problem has been verified through 3 real user complaints:
Competitor Landscape
- Zuora
- Chargebee
- Recurly
- Stripe Billing
- NetSuite SuiteBilling
Must-Have Features for MVP
Rules engine for subscriptions, usage, milestones, and bundles
Shadow billing with variance analysis and safe cutover
Automated journal posting and revenue recognition (ASC 606)
Credit/rebill, dispute portal, and write‑off workflows
Connectors to CRM/CPQ, ERP AR/GL, tax, and payments
Strong auditability with versioned rule sets
⚠️ Potential Challenges
- Deep data model mapping to existing ERP/CPQ
- Finance trust—need verifiable shadow period
- Tax/revenue recognition compliance
- Performance at high invoice/usage volumes
Risk Level: High
🎯 Keys to Success
- Time‑to‑launch new pricing models cut from months to weeks
- >80% reduction in manual invoice touches
- <0.5% billing variance post‑cutover
- Reduced DSO and measurable leakage recovery
Ready to Build This?
This hard-difficulty project could be your next micro-SaaS success.