ERP, B2B/B2C portals, accounting integration (Sage, Cegid, Pennylane), industry-specific software. Our team builds with the latest technologies, automates manual work and reduces headcount. Fixed price, 12-month warranty, GDPR & Factur-X compliant.
Technologies & integrations we work with
What we build
One budget, one team — instead of 12 freelancers to coordinate. Frontend, backend, mobile, devops, AI — all under our roof, hosted in France.
Stock, orders, production, finance, CRM, B2B portal. Two-way integration with Sage 100/X3, Cegid, Pennylane, EBP, Quadra, ACD, SAP. Role-based rights, multi-site, multi-currency accounting, 20% VAT.
Amazon FR, Cdiscount, Fnac, ManoMano, La Redoute, Rakuten FR, Veepee, Darty. Product/stock/price sync from one panel. Order automation, carrier integration (Colissimo/Chronopost/Mondial Relay/Colis Privé/DPD/GLS), returns handling.
One code base, two platforms with React Native. App Store + Google Play publishing included. Push notifications, offline mode, biometric login, in-app payments (Stripe FR, Lydia, HiPay, PayPlug, Klarna, Carte Bancaire).
Customer-service chatbot, product description generator, invoice OCR, smart stock forecasting, customer segmentation. Choose: OpenAI GPT-4, Claude or our own model hosted in France (Scaleway).
Factur-X mandatory 2026, DGFiP filing via Chorus Pro, VAT return, DSN URSSAF, REP / TGAP eco-contribution. Integration with Sage, Cegid, Pennylane, EBP, Quadra. Automatic invoicing with SIRET/SIREN.
Logistics (multi-depot TMS), healthcare (Doctolib/SESAM-Vitale/Ameli), education (LMS), construction (site tracking + URSSAF DSN), restaurants (POS + QR menu + Uber Eats/Deliveroo), real estate (CRM + listings), jewellery. A team that speaks your industry.
Real results
One portal + one operator replaced 5 people doing manual work. A few French examples.
1,200 daily shipments tracked in Excel; migrated to a mobile + desktop QR/barcode panel. Real-time depot-HQ sync across 4 warehouses (Paris, Lyon, Marseille, Toulouse).
8 stores, 14,000 SKUs, 4 warehouses. Stock drops caused oversells. Central panel + AI-predicted stock alerts + Colissimo pickup.
Appointments, patient records, imaging viewer, SESAM-Vitale + Ameli integration, e-Prescription across 6 practices. iOS/Android patient app with Doctolib reminders.
Field engineer logs hours, material requests and progress photos on mobile. Live dashboard for the project manager. Automatic URSSAF DSN filing.
Chain of 12 restaurants in Paris/Lyon. Floor staff cut by 40% — guests order via QR, kitchen screen syncs, Uber Eats + Deliveroo + Just Eat integration.
180 resellers used to order by phone/email. A B2B portal + two-way Sage X3 integration automated order > Factur-X invoice > Chronopost shipping.
Our method
No months of agile waffle. Fixed price, fixed timeline, weekly demos. No surprise invoices or invisible PMs.
We discuss your processes (60-90 min) over video or at our Le Marais office. Current software, problems, goals are mapped. Within 3 business days you get a fixed-price quote, module by module, with a timeline. No commitment.
Wireframes + clickable Figma prototype. We walk through screens together and you approve the final version. Data model, integration map and API spec documented in English/French.
Frontend + backend + mobile in parallel. Cursor + Claude/GPT-4 produce code 40% faster. Weekly live demos + screencasts. Open GitHub access — you see the code.
Sage/Cegid/Pennylane, Factur-X, marketplace APIs (Amazon FR/Cdiscount/Fnac), Stripe/PayPlug/CB, carrier APIs (Colissimo/Chronopost/Mondial Relay) — all integrated. UAT testing with you. Bug list closed in 48 hours.
2-3 live training sessions in French or English (recorded). Deployment on OVH/Scaleway in France, SSL, backups, monitoring. Soft launch — 1 week with pilot users. Then full handover.
12 months free bug-fix warranty. After: optional maintenance contract (hourly or monthly retainer). 24/7 monitoring — 99.9% uptime SLA. New features via monthly sprints.
Local marketplaces, carriers, payment methods and compliance frameworks — from a single panel
A kozmetik markası in Paris
"Cdiscount + Amazon.fr ile DACH+FR pazarında 5 ayda 120K€ ciro"
Tailored quote
No catalogue prices. We listen to your needs, scope the modules and deliver a fixed-price + fixed-timeline quote within 3 business days. The call is free, no commitment. Prices in € ex-VAT, 20% VAT added.
Whatever the scope, the following is standard — at no extra cost.
Bring these items — a precise quote in 60 minutes.
We work on fixed-price + fixed-timeline. Delivery date is in the contract; if late, we pay 3% penalty per week (capped at 20%) under Loi Sapin 2. This works because we scope precisely from day one, avoid scope creep and use AI-assisted code. 23 of our last 24 projects shipped on time or early (references shared on the discovery call).
Yes — hosting at OVH (Roubaix/Strasbourg) or Scaleway (Paris) of your choice, never outside the EU without explicit consent. Full GDPR compliance: DPO, processing register, privacy policy, right to erasure, data export. We hand you a signed DPA. For healthcare, certified HDS (Hébergeur de Données de Santé) hosting available.
Yes, completely. All ERP/B2B portals we ship in 2025 already emit Factur-X (PDF/A-3 + CII XML) and connect to Chorus Pro for the public sector. For the 2026 rollout (B2B private via PDPs), we integrate the DGFiP-approved Plateformes de Dématérialisation Partenaires. No extra migration on your side.
**The code is 100% yours.** The GitHub repo is transferred free of charge. You can continue with any other French agency or hire developers in-house. Vendor lock-in is not our model — we retain clients through quality, not contract.
On the contrary. Our senior developer with Cursor + Claude/GPT-4 ships ~40% faster with 25% fewer bugs than a developer alone (internal measurements). AI writes code, but architecture, code review and tests go through our 12-year team. Result: same quality, faster and cheaper.
**Marketplaces:** Amazon FR/EU/US, Cdiscount, Fnac, ManoMano, La Redoute, Rakuten FR, Veepee, Darty, Bol.com, Allegro. **ERP/Accounting:** Sage 100/X3, Cegid, Pennylane, EBP, Quadra, ACD, SAP, Oracle. **e-Document:** Factur-X via DGFiP-approved PDPs, Chorus Pro. **Payment:** Stripe FR, Lydia, HiPay, PayPlug, Klarna, Carte Bancaire (CB), PayPal, SEPA. **Carrier:** Colissimo, Chronopost, Mondial Relay, Colis Privé, DPD France, GLS France, UPS, DHL. If the system has a REST/SOAP API, we integrate.
Not an exaggeration — call our references. When manual Excel/email/phone processes migrate into a portal, one panel typically replaces 3-4 back-office people. It's not about layoffs — you redeploy those staff to higher-value functions. No forced economic layoffs imposed by digitalisation.
Logistics, e-commerce, healthcare (with Doctolib/SESAM-Vitale/Ameli), education, construction (with URSSAF DSN), restaurants (Uber Eats/Deliveroo), real estate, jewellery, B2B textile, retail, automotive, agriculture — live projects in all these sectors. If yours isn't listed, on the call we connect you with 1-2 similar clients.
No — the code is yours, you run it. During the 12-month warranty all bugs are on us. After: (1) an in-house developer takes over, (2) monthly maintenance contract (packs: 8 h/month €690 — 40 h/month €2,980, ex-VAT), (3) hourly support (€130/h ex-VAT). No commitment.
Yes — for e-merchants subject to REP (Extended Producer Responsibility: textile, furniture, packaging, EEE, toys…), our ERP/portals automatically compute TGAP eco-contribution per SKU and file with eco-organisations (Citeo, Refashion, Ecologic, ecosystem, Ecomaison). Quarterly reporting included.
Custom software for a French SME means hooking into the local Sage 100, EBP, or Cegid ERP; submitting Factur-X invoices through Chorus Pro; tapping Bridge or Tink France for Open Banking; and passing the CNIL's RGPD audit. This is a different stack from the DATEV+SAP world that dominates Germany.
France relies heavily on domestic accounting and ERP packages. Sage 100 (formerly Sage France) is the SME standard; EBP and Cegid Quadra serve micro-SMEs and accounting practices; SAP Business One and Microsoft Dynamics sit at the mid-market.
| Software | Segment | API | Factur-X |
|---|---|---|---|
| Sage 100 | SME (10-200 staff) | REST + ODBC | Module |
| EBP Open Line | Micro-SME | SOAP + REST | Since 2025 |
| Cegid Quadra | Accounting practices | REST | Full support |
| SAP Business One FR | Mid-market | SAP B1 SL | Add-on |
| Pennylane | Cloud-native | REST + Webhook | Native |
Chorus Pro is the state B2G invoicing portal operated by AIFE. It has been mandatory for all government suppliers since 2017. From 2026, receiving Factur-X B2B invoices becomes mandatory for every French company; issuance follows in 2026-2027 by company size.
Factur-X is the standard: a PDF/A-3 visual layer with embedded XML CII (Cross Industry Invoice). Profiles range from Minimum and Basic WL to EN16931 and Extended. Our architecture renders the PDF, embeds the CII payload, posts to the Chorus Pro REST API, and listens for the status webhook.
PSD2 transposed into French DSP2 forces banks to expose APIs. Local aggregators handle the AISP/PISP licensing: Bridge (by Bankin'), Tink France, Powens (ex-Budget Insight), Linxo. Bank coverage spans BNP Paribas, Crédit Agricole, Société Générale, LCL, Banque Populaire, Caisse d'Épargne, Crédit Mutuel, La Banque Postale, HSBC France and Boursorama.
RGPD is locally transposed as Loi Informatique et Libertés. Data residency is politically charged — some public-sector projects demand sovereign cloud (OVHcloud, Scaleway, Outscale) over AWS/Azure. The SecNumCloud qualification issued by ANSSI is the highest sovereign security level.
FranceConnect is the state SSO using ImpotsGouv, Ameli, La Poste as identity providers. Yousign (Caen) is the French e-signature leader, eIDAS-compliant at Advanced and Qualified levels. Alternatives include DocuSign, Universign and Oodrive.
OVHcloud, headquartered in Roubaix, is the world's fourth-largest hoster; offering Public Cloud, Bare Metal, VMware-based Hosted Private Cloud and SecNumCloud-qualified segments. Scaleway (Iliad/Free group) is developer-friendly with Kubernetes and serverless. Outscale (Dassault Systèmes) serves defence and aerospace.
Banking-grade software answers to ACPR (Autorité de Contrôle Prudentiel et de Résolution). AML/KYC flows lean on Onfido, Ariadnext (Rennes-based, local) and Veriff. Health software requires the HDS (Hébergeur de Données de Santé) certification — OVHcloud is HDS-certified, Scaleway is not yet. Real-estate platforms tap the DVF (Demandes de Valeurs Foncières) open dataset and the BatID shared building identifier.
Insurance-grade systems carry the heaviest regulatory load via ACPR Solvency II reporting. SEPA Direct Debit mandate management typically uses GoCardless, Hexa Pay or Stripe Direct Debit.
Software go-live is not just a technical milestone — it's the start of regulatory compliance. DGCCRF (Direction Générale de la Concurrence, de la Consommation et de la Répression des Fraudes) audits consumer protection, price labelling and subscription cancellation (Loi Chatel). Appointing a DPO (Délégué à la Protection des Données) and maintaining a Records of Processing Activities register (RAT) are statutory obligations.
Annual cadence: January DSN (Déclaration Sociale Nominative) for payroll, March annual tax return, May CFE+CVAE local taxes, September corporate-tax advance. The software should automate this rhythm and sync with the accounting practice via API.
Public-sector entities and "souveraineté numérique"-conscious companies prefer self-hosted GitLab or Forgejo (a Codeberg fork) over GitHub. Scaleway Kubernetes Kapsule and OVHcloud Managed Kubernetes Service are production-grade Kubernetes choices, used by Pôle Emploi, the Direction Générale des Impôts and Caisse des Dépôts.
Zunapro's France custom-software projects ship on NestJS + PostgreSQL + Next.js with Sage/EBP/Cegid connectors, a Chorus Pro invoice module, Bridge Open Banking integration, Yousign e-signature, OVHcloud hosting and a CNIL data map. Typical projects run 3-6 months at €30.000-€120.000.
Maintenance contracts typically sit at 18-22% of the build price per year, with a 4-hour SLA and 16 dev hours/month. A quarterly Lighthouse + OWASP ZAP scan and an annual ANSSI-aligned pen-test round out the operations package.