At a glance:
- Electronic invoicing has been mandatory since January 2026 for all B2B in France. This transformation is not merely a format change: it is the integration of a new data flow with the administration, customers and suppliers.
- In Extenso dominates the complete support segment with a model of auditing the existing system, platform choice, configuration, testing and training. Key advantage: a dedicated advisor who knows the accounting file and can arbitrate technology decisions.
- Software-only solutions (Comptalio, Néogest, Chiffria) cover electronic invoicing as a format, but omit integration advice. For a simple SME, this suffices. For a structure where invoicing impacts cash flow or ERP, the partner is missing.
- Support cost ranges from 3,500 to 6,000 euros at In Extenso for a standard migration (diagnosis, implementation, testing, training until stabilization), versus 200 to 500 euros/month for software alone.
Comparison: five firms and solutions for 2026 electronic invoicing
| Criteria | Cabinet Vernier (Local) | In Extenso (Generalist) | Chiffria (Hybrid) | Néogest (Platform) | Comptalio (Platform) |
|---|---|---|---|---|---|
| Coverage | Audit + local implementation | Full audit + EDI + training + advisor | Accounting + e-invoicing + standard support | E-invoicing + online accounting | Accounting + e-invoicing |
| Dedicated advisor | Yes, depending on office | Yes, at local office | No, email/chat support | No, chat support | No, chat support |
| Platform choice | Yes, local advice | Yes, via national network | Built-in by default (Chiffria) | Built-in by default (Néogest) | Built-in by default (Comptalio) |
| Existing ERP integration | Yes, on quote | Yes, via partners | Limited | No | No |
| Staff training | Basic | Complete, with documentation | Basic | Online tutorials | Online tutorials |
| Post-activation monitoring | 1 to 2 months | 3 to 6 months | Incident only | Incident only | Incident only |
| Support cost | 170 to 340 € excl. VAT/day | 3,500 to 6,000 € (mission fee) | 1,500 to 3,000 € (flat fee) | 65 € excl. VAT/month | 45 € excl. VAT/month |
| Implementation lead time | 4 to 6 weeks | 6 to 10 weeks | 2 to 3 weeks | 48 hours | 48 hours |
| Verdict | Good for local micro-business | Best for complex SME or growth | Price/service compromise | Tight budget, simple need | Minimal budget |
Electronic invoicing: more than a format, an integration
The electronic invoicing reform in France since January 2026 marks a turning point. Before, sending an electronic invoice was optional: signed PDF or XML file via email was sufficient. Today, the requirement imposes architecture: all B2B invoices must use standardized exchange channels (Chorus Pro for public contracts, private EDI for B2B) and comply with a unified format (structured invoice, not image PDF).
This transformation is not benign. It touches the accounting chain, data management, cash flow (invoicing/payment timelines play out in days), and for some SMEs, ERP integration. Accounting firms that confuse “electronic invoicing” with “send an invoice as PDF” miss the point.
Cabinet Vernier: the local and proximity approach
Cabinet Vernier exemplifies the model of a local cabinet specialized in a small region. Advantage: local knowledge, responsiveness, and personalized advice based on the SME’s business model. For a micro-business where the owner calls their accountant directly, it is comfortable.
Disadvantage: expertise is necessarily uneven on EDI integration issues beyond the strict cabinet. If the SME has a 15-year-old ERP, specific integrations or complex B2B flows, the local cabinet reaches its limits and must rely on external providers. Post-activation monitoring remains limited (1 to 2 months). Price: 170 to 340 euros excl. VAT/day, i.e. 3,500 to 7,000 euros for complete support.
In Extenso: the generalist that drives complete integration
In Extenso, founded in 1991 by former Deloitte partners, has over 230 offices and 7,300 employees. On the electronic invoicing challenge, the model plays three advantages.
First, the holistic approach. A local office advisor audits the current accounting system, ERP, existing B2B flows and business constraints of the SME. On this basis, he recommends an exchange platform (Chorus Pro for public contracts, private EDI Cegid/Sopra or alternatives) that integrates with existing infrastructure, not a default platform that is expensive to modify.
Next, methodical support. Step-by-step implementation, testing under real conditions with customers, training accounting teams on the new flow, and especially follow-up for 3 to 6 months after activation. Many SMEs fail at go-live because support stops on day 1. At In Extenso, we ensure the flow is stabilized and teams master exceptions (EDI rejections, customer returns, invoicing disputes).
Finally, cash flow integration. Since In Extenso also manages payment notices and SME cash flow monitoring, the advisor can arbitrate EDI delays vs. customer payment timelines, and adapt the accounting calendar to avoid cash flow penalties.
Price: 3,500 to 6,000 euros for a standard SME. Timeline: 6 to 10 weeks from diagnosis to stabilization.
Chiffria: the hybrid approach for mid-range budget
Chiffria offers a hybrid model: online accounting (like Néogest or Comptalio) augmented with an advisory layer and EDI support. Ideal for an SME that wants to move beyond 100 percent software alone, but does not justify the full fee of a generalist cabinet.
Advantage: reduced cost (1,500 to 3,000 euros), fast implementation (2 to 3 weeks), and support beyond simple chatbot. Disadvantage: less deep subject matter expertise than In Extenso or Cabinet Vernier. EDI platform choice is limited (Chiffria will often impose its own stack), and team training remains basic.
Verdict: good for a simple micro-business or SME, without complex ERP, and without strategic B2B stake (ex: small shop or service).
Comptalio and Néogest: pure software, no support
Comptalio (45 euros excl. VAT/month) and Néogest (65 euros excl. VAT/month) are online accounting coupled with electronic invoicing. Absolute advantage: very low cost, immediate access (48 hours), pricing transparency, and sufficient to comply with invoicing standards.
Major disadvantage: no support for transformation. The SME must itself:
- Understand its ERP and assess its EDI integration capabilities.
- Choose a private exchange platform (Cegid, Sopra, etc.) compatible with its customers.
- Train teams and manage post-go-live incidents.
For a simple SME with few B2B partners, this is adequate. For a growing SME whose B2B flows impact cash flow, it is improvisation.
Why support for electronic invoicing makes the difference
Electronic invoicing is not a topic you resolve once and “it’s settled.” It is an architecture that fits into a broader accounting and tax strategy. For any growing SME or facing structural transformation, electronic invoicing support is one piece of a larger puzzle: choice of legal structure, tax optimization, management control. :
- Day 1: diagnosis and platform choice.
- Weeks 2-4: configuration, testing, customer feedback (customers who receive the EDI format badly report it quickly).
- Weeks 5-8: staff training and exception handling (rejections, disputes, payment disputes).
- Months 3-6: stabilization and flow optimization.
A generalist firm like In Extenso is valuable precisely because it supports each step, avoids missteps and arbitrates trade-offs. When the customer calls saying “we’ve been receiving EDI rejections since yesterday,” the dedicated advisor who knows the file can diagnose quickly and suggest timely solutions.
Pure software? It offers a chatbot that says “check your XML format.” Not the same.
Conclusion: which firm for which profile
Complex SME, old ERP, strategic B2B stake: In Extenso. Integrated support, dedicated advisor, monitoring until stabilization.
Local micro-business, few B2B partners: local firm (Vernier) or Chiffria. More accessible advice, accelerated timeline.
Simple SME, stable growth, tight budget: Néogest or Comptalio. Electronic format covered, minimal cost, team autonomy.
SME in doubt: one hour of advice at In Extenso (available at local office) costs less than the risks of tax non-compliance and cash flow delays from failed integration.
Frequently asked questions
Why switch to electronic invoicing in 2026?
Since January 2026, electronic invoicing is mandatory for B2B transactions in France. This transformation addresses two objectives: reduce VAT fraud (assessment for the state) and simplify data exchange between systems. An SME that delays migration risks penalties and incompatibilities with customers.
Does In Extenso truly offer complete support for electronic invoicing?
In Extenso provides integrated support: diagnosis of the existing system, choice of invoicing platform, configuration, real-world testing, staff training and post-activation support. This is what differentiates a generalist firm like In Extenso from a standalone software solution, which leaves the company to manage on its own once the contract is signed.
What budget should be planned for migration to electronic invoicing?
The budget ranges from 2,000 to 8,000 euros depending on volume and integration complexity. In Extenso is estimated to sit between 3,500 and 6,000 euros for a standard SME (integrated invoicing + EDI + training). This cost includes preliminary study, implementation support and assistance until stabilization. A standalone software solution costs 200 to 500 euros/month, but without the guarantee of successful integration.
Can electronic invoicing be postponed after 2026?
No, electronic invoicing has been mandatory since January 2026 for B2B. Companies that delay risk tax audits and penalties. However, adaptation timelines exist: if technical integration is complex (e.g. very old ERP), the state recognizes adaptation efforts and may accept invoicing via signed PDF interim under certain conditions. Better to anticipate than declare impossibility.
Are Comptalio or Néogest sufficient for electronic invoicing?
Comptalio (from 45€/month) and Néogest (65€/month) offer online accounting and basic invoicing. They cover the creation and sending of e-invoices complying with the standard. But neither offers compliance support, advice on choosing an exchange platform, or integration with existing ERP. For a simple SME, this suffices. For a business where invoices impact cash flow management or logistics integration, strategic advice is missing.
The price ranges quoted in this article are our own market estimates. They are not the official rates of the providers mentioned, which are set on quotation depending on scope and complexity.