When no software on the market fits the way you work
For SMEs with 10 to 250 employees, in France, Belgium, Spain and Italy. For example, an SME of 30 employees that tracks its sites in three spreadsheets and wants a single tool, shared between the office and the field.
- A web application. It opens in a browser. Nothing to install on each computer.
- Shared building blocks. What comes back in many pieces of software (user accounts, customer file) will be reused from one project to the next, then adapted to your case. It will not be rewritten each time.
- AI helps, a written method keeps it in check. We develop with the help of AI. You approve the description of your software. Then each step goes through automated tests and reviews.
Need a small tool for one of your AI agents? It stays included in the agent's set-up, on quote.
From your idea to delivered software, in eight steps
The price is fixed and signed at step 4. You pay in three instalments, as the work progresses.
- Your need and your budget. The screens, the people who will use them, the tools to connect, and your development budget excluding VAT: an amount or a range.
- An estimate you can read. A reference range, with its method. It is not a price.
- Two or three versions. Essential, Recommended, Extended, with the lead time of each.
- A fixed-price quote. Signed before the first hour of work. 30% paid
- The approved specification. Nothing is coded before you agree. 40% paid
- One demonstration a week. You see it, you comment.
- Acceptance testing. You check that the software does what the specification says, and you accept it. 30% paid
- The code is handed over to you. Source code, documentation, access.
Learn more: the estimate and the payment schedule
The reference estimate counts our working hours, the cost of AI, reviews and tests, and project management. It is a benchmark, so you can judge your budget with full knowledge. For each version, you see the included features, the lead time, and what is left for later.
The default payment schedule: 30% when the quote is signed (the deposit), 40% when you approve the specification and the first demonstration, 30% at acceptance testing. It is set project by project; the payment terms are stated in your quote. A client area is planned to follow each step: the next action expected, and who owns it.
Your amount decides what we build
Custom software has a real cost: human time, AI, testing. “Pay what you want” does not suit it. You name a budget, and that budget sets what we build, not the other way round.
- Essential. The useful minimum.
- Recommended. The version we advise.
- Extended. If your budget allows.
Budget too tight? Each version has a floor, never displayed. If your budget reaches it, it is accepted, after a 30-minute scoping call. If not, we make a single counter-offer, or we tell you frankly. No bidding.
Learn more: the floor, the law and the method
“Pay what you want” works badly when each sale is expensive to produce. Economists have studied it (Krämer, Schmidt, Spann and Stich, 2015). Another model remains usable when that cost is high: the customer makes an offer, and the seller compares it with a threshold it does not show. We chose this second model, with written rules. The principle fits in one sentence, taken from Basecamp's Shape Up method: “Estimates start with a design and end with a number. Appetite starts with a number and ends with a design.”
For each scope, we calculate a floor: the estimated full cost, plus a minimum margin. This floor is never displayed as a price. Its calculation method is provided on request. In France, when the price of a service cannot be fixed in advance, the provider must provide, on request, “the price calculation method allowing it to be checked, or a sufficiently detailed quote” (French Commercial Code, Article L441-1).
If your budget stays below the floor of the smallest useful scope, our only counter-offer is for a reduced scope or a minimum amount. If nothing useful fits within that budget, we point you to another option: an existing tool, or a tool that is configured without programming. The same project can only be re-offered at a lower price once. The floor will be recalculated from the real costs of delivered projects (time spent and cost of AI, measured project by project); each change of formula will be dated and recorded.
A fixed price, a written guarantee, and the code with you
- Fixed price, signed beforehand. The accepted amount becomes a fixed-price quote, signed before the first hour of work. Not a single line of code is written before you have approved the specification, attached to the quote.
- A guarantee on what you have approved. After acceptance testing, we fix every defect free of charge, for a period stated in your quote. A defect is a gap between the software and the approved specification.
- The code is handed over to you. Source code, documentation and access to the hosting. You will be able to develop your software further with another provider or in-house, under the conditions of your quote.
Learn more: what the law says
Why sign beforehand? In France, in a service contract, if there is no agreement before performance, the Civil Code provides that “the price may be set by the creditor”, that is, the provider, who must justify it if challenged (Article 1165). We prefer everything to be fixed beforehand.
No full “satisfied or refunded”: the guarantee covers what was promised in writing.
The law provides that, when an author assigns their rights, each assigned right is the subject of a separate mention (French Intellectual Property Code, Article L131-3). Our contract will list each right assigned to you. Some parts are shared and reused from one project to the next. For these, a licence (you may use these parts under the conditions provided, without becoming their owner) may replace the assignment: this point is stated in your quote.
Three maintenance levels, you name the amount
You choose a level and you name your monthly amount, above a minimum calculated from the development price and stated in your quote. A report every month, and your software will report its own errors to us.
- Essential. Hosting if we provide it, security, updates.
- Standard. Essential, plus fixes.
- Premium. Standard, plus small enhancements.
The optional value bonus. Once the software is accepted, you can pay a supplement if you feel it is worth it. It is invoiced separately, and never required.
Learn more: maintenance, hosting and bonus
The response times for each level, payment, commitment and termination are stated in your quote. A client area is planned to follow each request. Your software can be hosted by us, in the European Union, or by you: this point is defined with you in your quote. An AI model used for development or maintenance may be operated outside the EU, under the safeguards of the GDPR, the European regulation on personal data.
Why does the bonus come afterwards? A study published in the Journal of Marketing (KC, Mak and Ofek, 2023) finds that people pay more after receiving a product than before when its value is high; when it is low, the opposite happens. Our calculation therefore never relies on this bonus: it rewards software that keeps its promises.
Name your budget
Is your need clear? Write to us: describe what the software must do and name your budget.
Not sure whether you need software, AI agents, or better use of your current tools? Tell us that too. We will tell you where to start, for example an audit of your tools, at €490 excl. VAT.
Sources
- French Commercial Code, Article L441-1 (version in force since 26/04/2019): method for calculating the price of a service, provided on request · accessed 12 October 2026
- French Civil Code, Article 1165 (version in force since 01/10/2018): price of a service where there is no agreement before performance · accessed 12 October 2026
- French Intellectual Property Code, Article L131-3 (version in force since 03/07/1992): separate mention of each assigned right · accessed 12 October 2026
- Krämer, Schmidt, Spann and Stich, “Delegating Pricing Power to Customers: Pay What You Want or Name Your Own Price?”, Münchener Wirtschaftswissenschaftliche Beiträge (VWL) 2015-5, 7 May 2015, University of Munich repository (abstract and introduction; published version: Journal of Economic Behavior & Organization, vol. 136, 2017) · accessed 13 October 2026
- Cambridge Judge Business School, “Why timing affects pay-what-you-want amounts” (KC, Mak and Ofek, Journal of Marketing), 07/02/2023 · accessed 13 October 2026
- Crossref, record of the article by KC, Mak and Ofek, “Before or After? The Effects of Payment Decision Timing in Pay-What-You-Want Contexts”, Journal of Marketing, vol. 87, no. 4, 2023 · accessed 13 October 2026
- Basecamp, Shape Up, chapter 3 “Set Boundaries” (quotation on appetite, translated) · accessed 13 October 2026