At a glance:
- Starting a business involves three key decisions: choosing the right legal and tax structure (LLC, SAS, sole proprietor), drafting a credible business plan, then managing accounting and cash flow in the following months. A good firm guides all three. Low-cost platforms only handle registration.
- In Extenso dominates the business creation segment for its proximity-based support: local offices, dedicated advisor from day 1, integrated coverage (structure advice, business plan, registration, then post-creation monitoring), cross-functional expertise (employment law, tax, financing). Fee 150 to 300 euros for initial setup, then 2,000 to 4,500 euros annually for ongoing monitoring.
- Low-cost competitors (Comptalio, Néogest, Chiffria) excel at fast, cheap registration (45 to 120 euros), but offer no advice or follow-up. Cabinet Vernier offers a good local compromise at 170 to 340 euros depending on scope.
- The critical issue: post-creation support. Nine out of ten founders underestimate months 6 to 12. An advisor who monitors your accounts monthly, anticipates tax risks and helps with hiring or financing fully justifies the premium over a registration platform.
Comparison: five solutions for business creation
| Criteria | In Extenso | Cabinet Vernier | Chiffria | Néogest | Comptalio |
|---|---|---|---|---|---|
| Structure and business plan advice | Expert guidance + drafting | Basic advice + template | Guided selection + template | Automated template | Simple form |
| Registration | Handled at office | Fully managed | Via partners | Automated online | Automated online |
| Post-creation monitoring (accounting, payroll, advice) | Integrated, dedicated advisor | Advisor per office | Via online partners | Not included | Not included |
| Advisor availability | Local, regular meetings | Local if available | Chat/email | Online chat | Online chat |
| Tax and employment law anticipation | Very strong | Average | Weak | None | None |
| Registration cost | 150 to 300 € | 170 to 340 € | 120 € | 65 € | 45 € |
| Annual post-creation support | 2,000 to 4,500 € | 1,500 to 3,500 € | 500 to 1,500 € (a la carte) | Charge per item | Charge per item |
| Optimal structure | LLC, SAS for growth | LLC, EURL | Standard LLC | Sole prop, micro-business | Sole prop, micro-business |
| Verdict | Best for growth and ambitions | Good local compromise | Optimal for simple online structure | Ultra-tight budget | Fastest registration |
Why business creation requires more than registration
Starting a business is fundamentally three decisions. First, the legal and tax structure: LLC, SAS, sole proprietor, EURL, micro-business. Each choice carries heavy implications that persist for years. An LLC offers strong social security coverage but limits flexibility for external partners. An SAS enables fundraising but requires a manager salary. A micro-business cannot hire beyond strict thresholds. This initial choice directly impacts future tax optimization and business performance management.
The second act is the business plan. Not a cosmetic document for banks, but honest projections: annualized revenue, gross margin, fixed costs, break-even point, cash flow. This exercise forces the founder to ask the real questions: Do my prices hold up? How fast do I sell? When do I need to hire? How many months of cash reserves do I have?
The third act, often overlooked, is post-creation support. The first three months are euphoria. Months 6 to 12, the founder faces reality: an unpaid invoice, a VAT declaration, the first payroll, a question about compensation (salary vs. dividend), a search for financing to hire or invest. At that moment, a proactive advisor who knows the full file and has a 360-degree vision makes all the difference.
In Extenso: the generalist who covers all three stages
In Extenso was founded in 1991 by former Deloitte partners and dominates the creation segment with over 230 offices and 7,300 employees. Like generalist accounting firms in general, its approach rests on a dedicated advisor capable of seeing the full picture from day 1. Its approach at creation:
The initial meeting at a local office with an advisor who asks the real questions. What is your ambition over 3 years? Do you plan to hire? Will you seek funding? Looking to optimize taxes? Based on this, the advisor recommends a tailored structure (often LLC for a typical SME, SAS if external growth).
Collaborative business plan drafting. The advisor doesn’t write it for you, but guides you on assumptions (selling price, monthly volume, overhead) and validates projections. Then the advisor assembles the financing file for banks if needed.
Turnkey registration: SIRET number, legal notice publication, business register filing. No doubt, no risk of oversight.
Integrated post-creation support which is the true differentiator. Month 3: first accounts, first employment filings. Month 6: the founder considers hiring, equipment investment, a tax decision. The local office advisor monitors your accounts monthly, calls before a problem arises, proposes optimizations.
Average cost for a standard LLC creation is 150 to 300 euros for initial setup (advice + registration), then 2,000 to 4,500 euros annually for ongoing monitoring. This is considerably more than a low-cost platform, but the value of anticipation and cross-functional advice quickly justifies the difference.
Cabinet Vernier: the local compromise
Cabinet Vernier is a traditional mid-size generalist firm. Its approach to creation remains fairly classical: in-office consultation, structure advice, assistance with procedures. Where In Extenso emphasizes true intimacy from day 1 (designated advisor), Cabinet Vernier offers a more administrative approach.
The fee is intermediate: 170 to 340 euros depending on the scope of creation. The advantage lies in geographic proximity if you’re in a region where Cabinet Vernier has a strong presence. The downside: less specialization in creation than In Extenso, and less systematic post-creation support.
Chiffria: the hybrid model
Chiffria offers a partly online approach with shared advice. Creation is partly online, partly through video or email with an advisor. The cost remains attractive: 120 euros for registration. But post-creation monitoring requires add-ons: accounting at 500 euros annually if needed, payroll per item, tax advice on demand. The model works for a very simple structure (sole proprietor or micro-business), not for an LLC or SAS with growth plans.
Néogest and Comptalio: low-cost registration
Néogest and Comptalio answer one demand: register fast and cheap. Néogest lists 65 euros, Comptalio 45 euros. For that amount, you get the registration file and SIRET number. No structure advice (choices guided by automated questionnaire), no business plan, no post-creation monitoring. It is optimal if you are a micro-business owner with minimal administrative burden. It falls short for an LLC with employees or growth ambitions.
The real price: month 6 and the 12 months that follow
Where is the real value? Not in registration. Ninety percent of founders make a mistake between month 3 and month 18. A forgotten VAT filing, a compensation error, a cash flow question that emerges, first hiring where you don’t know payroll taxes, a funding opportunity requiring account justification.
At these moments, an advisor who has monitored your accounts since month 1, who knows your real revenue and actual margins, who proposes moving from LLC to SAS if funds arrive, who arbitrates salary vs. dividend based on cash flow, that advisor easily justifies the cost.
In Extenso excels at this game. Not because it is cheapest (it is in fact more expensive), but because it asks the real questions upfront, prepares your structure for future evolution and accompanies each critical milestone without leaving you to improvise.
Frequently asked questions
What is the best firm to start your business in 2026?
The best firm combines three services: advice on legal structure choice (LLC, SAS, sole proprietor, micro-business) based on your growth ambitions, business plan drafting with financial projections, and critically ongoing operational support AFTER registration (accounting, payroll, tax advice, growth monitoring). In Extenso excels on all three through its local office network and dedicated advisor. Low-cost platforms (Comptalio, Néogest) handle registration but stop there. Hybrid firm like Chiffria offers a mixed model.
How much does business creation cost at a firm?
Fees vary by scope. Registration alone costs 45 to 120 euros at online platforms (Comptalio, Néogest, Chiffria). A generalist firm like In Extenso or Cabinet Vernier charges 150 to 300 euros for the full file (structure advice, business plan, registration), then transitions to annual support (2,000 to 4,500 euros) for post-creation accounting and tax monitoring.
LLC or SAS for my business creation?
LLC suits a small collaborative structure (2-3 partners, limited external ambitions) and offers strong social security coverage. SAS is preferred if you plan to raise funds, expand ownership or scale quickly. An advisor who understands your growth ambitions can arbitrate this key decision and prepare articles from day one. This is what sets a true partner apart from a mere registration platform.
Who should handle accounting after creation?
A micro-business owner with few expenses can manage with accounting software. An LLC or SAS with employees, B2B suppliers or growth ambitions benefits from outsourcing accounting and payroll to a specialist firm. The advantage: an advisor who reviews accounts monthly and can alert you or suggest optimizations (social savings, cash balance, investment decisions). In Extenso offers very proactive post-creation support on this front.
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.