InvoiceSentinel.com

AI that catches fake invoices before your money leaves the account

Score: 7.7/10South AfricaHard BuildReady to Spawn
Brand Colors

The Opportunity

Problem

African supply chain businesses are increasingly victimized by surging cyber fraud as they adopt digital procurement and mobile payments without adequate protections.

Solution

InvoiceSentinel uses OCR and document intelligence to cross-check every incoming invoice against purchase orders, delivery notes, and historical vendor behavior. It detects common African procurement fraud patterns such as duplicate submissions, inflated quantities, and ghost suppliers, delivering a trust score and recommended action directly in a mobile app.

Target Audience

Supply chain operators, procurement managers, and SME owners in African businesses implementing digital payments and procurement

Differentiator

Trained specifically on East and West African invoice formats, tax IDs, and fraud tactics — with multilingual support for English, French, and local languages.

Brand Voice

professional

Features

Mobile Document Capture

must-have40h

Scan or upload invoices, POs, and delivery notes directly from phone camera

OCR + Entity Extraction

must-have60h

Extract vendor details, amounts, dates, and line items using localized models

Smart Document Matching

must-have50h

Automatically matches invoice to corresponding PO and delivery note

Fraud Risk Scoring

must-have55h

Detects anomalies like price spikes, duplicate invoices, or unknown tax IDs

Approval Workflow

must-have45h

Mobile approval chain with comments and e-signature

Blocked Payment Integration

must-have35h

API hook to prevent payment release on high-risk documents

Vendor Reputation Database

nice-to-have30h

Internal history of every supplier's past performance and red flags

Batch Processing

nice-to-have25h

Process 50+ documents at once for larger teams

Multilingual Support

nice-to-have35h

French and Swahili document understanding

Total Build Time: 375 hours

Database Schema

organizations

ColumnTypeNullable
iduuidNo
nametextNo
created_attimestampNo

Relationships:

  • has many users
  • has many documents

documents

ColumnTypeNullable
iduuidNo
org_iduuidNo
typetextNo
vendor_nametextNo
amountintNo
risk_scoreintNo
statustextNo
extracted_datatextYes
created_attimestampNo

Relationships:

  • belongs to organizations
  • linked to purchase_orders via matching_id

vendors

ColumnTypeNullable
iduuidNo
nametextNo
tax_idtextYes
risk_levelintNo
first_seentimestampNo

Relationships:

  • has many documents

API Endpoints

POST
/api/documents

Upload and trigger OCR/analysis

🔒 Auth Required
POST
/api/match

Find matching PO for an invoice

🔒 Auth Required
POST
/api/approve

Record approval decision and trigger payment gateway hook if needed

🔒 Auth Required

Tech Stack

Frontend
React Native + Expo
Backend
Django + Django REST Framework
Database
PostgreSQL with pgvector
Auth
Auth0
Payments
Paystack
Hosting
Railway
Additional Tools
Tesseract + Google Document AI fallbackscikit-learn anomaly modelsCelery + Redis

Build Timeline

Week 1: Core setup and document capture

55h
  • React Native app with camera integration
  • Django API + DB
  • Basic OCR pipeline

Week 2: Entity extraction and matching

60h
  • OCR accuracy tuning for African formats
  • PO-invoice matching logic

Week 3: Risk engine

50h
  • Anomaly detection models trained on sample fraud data

Week 4: Workflow and approvals

45h
  • Multi-user approval flows with notifications

Week 5: Vendor database and reports

40h
  • Persistent vendor risk profiles
  • PDF report generation

Week 6: Integrations and polish

35h
  • Payment blocking hooks
  • Testing with real African invoice samples
Total Timeline: 6 weeks • 480 hours

Pricing Tiers

Starter

$0/mo

10 documents/month

  • 10 documents/month
  • Basic OCR
  • Email reports

Pro

$25/mo

None

  • Unlimited documents
  • Full risk scoring
  • Approval workflows
  • Vendor database
  • Payment blocking

Enterprise

$79/mo

None

  • Everything in Pro
  • Custom ML model tuning
  • API access
  • Priority support
  • SSO

Revenue Projections

MonthUsersConversionMRRARR
Month 19012%$270$3,240
Month 668021%$3,570$42,840

Unit Economics

$41
CAC
$380
LTV
6%
Churn
81%
Margin
LTV:CAC Ratio: 9.3xExcellent!

Landing Page Copy

Stop Paying Fake Invoices That Look Real

AI document verification tailored for African procurement. Catch duplicates, ghost suppliers, and inflated bills before payment.

Feature Highlights

Camera-to-verification in under 30 seconds
Detects regional fraud patterns
Mobile approval workflows
Blocks risky payments automatically

Social Proof (Placeholders)

"'Found 3 duplicate invoices in our first week — saved us over $8,000' — Supply Chain Lead, Lagos"
"'The multilingual support is perfect for our cross-border operations' — Finance Director, Abidjan"

First Three Customers

Run targeted Facebook/LinkedIn ads in Nigeria and Kenya offering free invoice audits to procurement managers (targeting job titles). Partner with two accounting firms in Accra and Nairobi who serve SMEs and offer them revenue share for referrals. Host a webinar series 'Top 7 Invoice Frauds in African Supply Chains' with free tool access for attendees.

Launch Channels

ProductHuntLinkedInr/SaaSTechCabalAfrican Business Angel networksIndieHackers

SEO Keywords

invoice fraud detection africaai procurement verificationfake invoice preventionsupply chain document verificationocr invoice matching africaprocurement fraud tool

Competitive Analysis

Per document
Strength

Strong OCR

Weakness

Generic, not trained on African fraud patterns or tax regimes

Our Advantage

Region-specific models and direct integration with local mobile payment rails

Rossum

rossum.ai
Enterprise
Strength

Advanced AI

Weakness

Too expensive and complex for African SMEs

Our Advantage

Purpose-built $25/mo mobile-first solution for the continent

🏰 Moat Strategy

Continuously improving dataset of verified African invoice patterns and supplier tax IDs that cannot be easily replicated

⏰ Why Now?

Rapid digitization of procurement across Africa combined with explosion of sophisticated invoice fraud documented by PwC Africa Fraud Survey 2023.

Risks & Mitigation

technicalhigh severity

OCR accuracy on poor quality phone photos

Mitigation

Implement image enhancement pipeline and fallback to manual entry for low-confidence fields

marketmedium severity

Resistance to changing existing approval processes

Mitigation

Focus on non-intrusive 'advisory' mode initially that augments rather than replaces current systems

Validation Roadmap

pre-build21 days

Collect 200 real African invoices (anonymized) and interview 15 procurement managers

Success: Validation that 80% of common fraud types are detectable via document analysis

mvp42 days

Private beta with 15 companies processing real documents

Success: Minimum 70% accuracy reported and 10 companies willing to pay after trial

Pivot Options

  • Expand to full accounts payable automation
  • Offer supplier onboarding verification service
  • White label for large corporates

Quick Stats

Build Time
480h
Target MRR (6 mo)
$7,200
Market Size
$520.0M
Features
9
Database Tables
3
API Endpoints
3