From Zero to €700 MRR: Building an AI-Powered Accounting SaaS with Synq
How 12 Synq sessions across 4 repos and 106 commits produced Feen — a revenue-generating fintech platform riding Belgium's Peppol mandate.
Belgium made Peppol e-invoicing mandatory for all B2B transactions starting January 2026. Every VAT-registered business — over 1 million of them — needs to comply or face €5,000 fines per infraction. Feen was built to capture that wave.
The Opportunity
The accounting software market in Europe is projected to reach €4.4B by 2025, growing at 9.6% CAGR. But existing solutions are either enterprise-grade (and enterprise-priced) or too basic for Peppol compliance. Belgian SMEs — freelancers, small businesses, accountants — were underserved.
What We Built
Across 12 Synq sessions spanning 4 repositories and 106 commits, our agent crew shipped a complete fintech platform:
Core Features
- >Multi-bank PSD2 connections — Link any Belgian bank account, import transactions automatically
- >AI-powered document extraction — Upload an invoice photo, OCR extracts all fields, AI categorizes the transaction
- >Automatic reconciliation — Bank transactions matched to invoices with 95%+ accuracy
- >Peppol-certified e-invoicing — Send and receive in EN 16931 format. 3-minute onboarding to full compliance
- >VAT preparation — Quarterly VAT declarations pre-filled from transaction data
- >Real-time dashboard — Revenue, expenses, cash flow, and compliance status at a glance
Growth Engine
The killer feature isn't in the product — it's the free company lookup tool at feen.be/company-lookup. Enter any Belgian VAT number and instantly check Peppol readiness. This drives 10K monthly organic visitors with zero ad spend. Converting free users to paying subscribers is the entire acquisition strategy.
The Traction
| Phase | What happened |
|---|---|
| 12 Synq Sessions | 106 commits across 4 repos. Full fintech platform shipped. Peppol certification obtained. |
| January 2026 | Launched on day one of the Peppol mandate. First paying clients immediately. 10K monthly organic visitors. |
| Now | 35 paying clients at €19/month. €700 MRR and climbing. Accountant referral pipeline active. Mobile app in development. |
The Revenue Model
€19/month all-inclusive. No hidden fees for OCR, storage, or Peppol access. 500 documents/year included, pay-as-you-go beyond that. Simple, predictable, high-margin SaaS.
What Would This Cost With Traditional Development?
| Provider | Cost | Timeline |
|---|---|---|
| Traditional Dev Team | €50K–100K | 6–12 months |
| Outsource Agency | €30K–60K | 4–8 months |
| Single Senior Dev | €8K/month | 6+ months |
| Synq | 12 sessions | — |
The Stack
- >Frontend: Next.js, React, TypeScript
- >Backend: FastAPI, PostgreSQL, Python
- >Compliance: Peppol BIS 3.0, EN 16931
- >Banking: PSD2 API integrations
- >AI: OCR document extraction, transaction categorization
- >Infrastructure: Docker, automated deployment
Why This Worked
Three factors made Feen possible:
- 1.Market timing — The Peppol mandate created a deadline. Every Belgian business needed a solution by January 2026, or they'd face fines. We launched on day one.
- 1.SEO-first growth — The free company lookup tool was built specifically as a growth engine. It answers the exact question every business owner was asking: "Am I Peppol-ready?" That's 10K monthly visitors finding Feen organically.
- 1.Agent-powered velocity — A traditional development timeline would have missed the market window. Synq's parallel agent crew shipped a production-grade fintech platform in the time it would take a traditional team to finish the discovery phase.
Key Takeaway
Feen isn't an AI demo — it's a revenue-generating business serving real customers. The €700 MRR proves that AI-orchestrated development can produce commercial-grade software, not just prototypes. The regulatory tailwind (Peppol mandate) proves that speed to market is the real competitive advantage of AI agent orchestration.
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