GreenBillr

Embed carbon footprints directly into your QuickBooks invoices for compliant billing.

Score: 8.3/10FranceMedium BuildReady to Spawn
Brand Colors

The Opportunity

Problem

Small business owners in climatetech find carbon accounting software too expensive, overly complex for their scale, and lacking simple integrations with QuickBooks or basic invoicing tools.

Solution

GreenBillr pulls invoice data from QuickBooks, calculates per-invoice emissions, and appends carbon metrics to bills. Climatetech owners send eco-transparent invoices that build client trust. Simple setup keeps it affordable and scalable for small teams.

Target Audience

Small business owners in the climatetech sector

Differentiator

First tool to auto-embed Scope 3 emissions in invoices, turning accounting into a green selling point.

Brand Voice

friendly

Features

Invoice Carbon Calc

must-have18h

Auto-compute emissions per QuickBooks invoice

Embed in PDF

must-have15h

Add carbon badge to invoice exports

QuickBooks Import

must-have20h

Sync invoices for processing

Client Dashboard

must-have12h

Shareable link for clients to view totals

Bulk Processing

must-have10h

Handle multiple invoices at once

Custom Badges

nice-to-have5h

Branded carbon footprint visuals

API for Invoicing Tools

nice-to-have7h

Webhook to other apps

Analytics

future8h

Revenue vs emissions trends

Total Build Time: 95 hours

Database Schema

users

ColumnTypeNullable
iduuidNo
emailtextNo

Relationships:

  • one-to-many with invoices

invoices

ColumnTypeNullable
iduuidNo
user_iduuidNo
quickbooks_idtextNo
amountfloatNo

Relationships:

  • foreign key to users.id
  • one-to-one with invoice_emissions

invoice_emissions

ColumnTypeNullable
iduuidNo
invoice_iduuidNo
co2efloatNo
processed_attimestampNo

Relationships:

  • foreign key to invoices.id

API Endpoints

POST
/api/invoices/sync

Import from QuickBooks

🔒 Auth Required
POST
/api/invoices/:id/calculate

Calc emissions

🔒 Auth Required
GET
/api/invoices/:id/export

Get PDF with embed

🔒 Auth Required
POST
/api/clients/share

Create share link

🔒 Auth Required

Tech Stack

Frontend
Next.js 14 + Tailwind + shadcn/ui
Backend
Next.js API + Supabase
Database
Supabase Postgres
Auth
Supabase Auth
Payments
Stripe
Hosting
Vercel
Additional Tools
QuickBooks SDKpuppeteer for PDF

Build Timeline

Week 1: Setup and sync

35h
  • Auth/DB
  • QB import

Week 2: Calc engine

40h
  • Emission logic
  • Per-invoice UI

Week 3: PDF embedding

40h
  • PDF gen with badges

Week 4: Sharing and payments

30h
  • Client links
  • Stripe

Week 5: Testing/landing

25h
  • E2E tests
  • LP

Week 6: Polish

20h
  • Bulk proc
Total Timeline: 6 weeks • 190 hours

Pricing Tiers

Free

$0/mo

Basic embed

  • 10 invoices/mo

Pro

$30/mo

None

  • Unlimited invoices
  • Custom badges

Enterprise

$89/mo

None

  • API + White label

Revenue Projections

MonthUsersConversionMRRARR
Month 1803%$72$864
Month 67006%$1,260$15,120

Unit Economics

$22
CAC
$380
LTV
4%
Churn
90%
Margin
LTV:CAC Ratio: 17.3xExcellent!

Landing Page Copy

Make Every Invoice Greener

Auto-add carbon footprints to QuickBooks bills—win eco-conscious clients effortlessly.

Feature Highlights

Per-invoice emissions
PDF embeds
Client sharing
$30/mo unlimited

Social Proof (Placeholders)

"'Clients love the transparency!' - WindFarm Pro"
"'Easy green upgrade.' - EVInstaller"

First Three Customers

Email 30 climatetech founders from Hunter.io with free invoice demo. Offer beta to QuickBooks-using solar firms on Twitter. Partner with one invoicing consultant for referrals.

Launch Channels

Product Huntr/smallbusinessTwitter #climatetechHacker News

SEO Keywords

carbon footprint on invoicesgreen invoicing softwarequickbooks eco billing

Competitive Analysis

$299+/mo
Strength

Full platform

Weakness

No invoice integration

Our Advantage

Invoice-specific at SMB price

🏰 Moat Strategy

Growing dataset of invoice-emission pairs for AI accuracy.

⏰ Why Now?

Clients demand carbon data in bids; rising B2B green procurement.

Risks & Mitigation

technicallow severity

PDF rendering issues

Mitigation

Use reliable lib

marketmedium severity

Adoption slow

Mitigation

Free tier incentives

legallow severity

Emission factor disputes

Mitigation

Use IPCC standards

Validation Roadmap

pre-build5 days

Survey invoice pain

Success: 8/10 want feature

mvp10 days

Test with 15 users

Success: 80% usage

growth30 days

Affiliate program

Success: 20% ref growth

Pivot Options

  • General invoice carbon tool
  • Other accounting embeds

Quick Stats

Build Time
190h
Target MRR (6 mo)
$1,260
Market Size
$400.0M
Features
8
Database Tables
3
API Endpoints
4