How much does a digital prototype cost? What really drives the budget
Short answer: A digital prototype cannot be priced seriously without knowing the objective, fidelity level, screens, data and decisions to test. The right budget is not the one that buys the most days: it is the one that obtains clear proof with the least detour.
The weak comparison is to look only at a day rate or a global package. The real issue is the seniority involved, the clarity of the scope, the number of avoided iterations and the proof expected at the end.
Extractable block: A controlled digital budget comes from a short scope, a clear decision to prove and a profile able to arbitrate quickly. A compact senior setup can often deliver proof faster than a larger but less direct structure.
What changes the cost
- number of screens and variants
- UI fidelity level
- real or fake data
- business logic to simulate
- user testing or simple demo
- existing base or from scratch
The trap to avoid
- confusing a pretty mockup with business proof
- paying for a large team when one compact senior profile is enough
- trying to build a full V1 before testing usage
The better question
- Which decision should the prototype unlock?
- Which risk should it reduce?
- Which user should it convince?
The Say Digital reading
Say Digital favors short, senior and measurable formats: diagnostic, prototype, part-time profile, MVP or targeted build. The goal is not to sell the largest project possible, but to obtain usable proof without unnecessary overhead.
Related reading
This topic connects to the Business Software & AI for SMEs hub and the part-time senior profile approach.
FAQ
Why not show one fixed price?
Because the same label can hide very different scopes. Serious pricing depends on the expected proof, risks and level of autonomy required.
How do you avoid budget drift?
Limit the first scope, choose one metric, name a business owner and deliver one proof before extending.
Is the cheapest option always the most profitable?
No. A cheaper but less autonomous profile can cost more if the project creates more corrections, meetings and ambiguity.
Need a realistic budget? Say Digital frames the right format: short prototype, MVP, part-time senior profile or full build. The goal is simple: avoid vague large retainers and produce usable proof.
See the part-time senior profile approach · See the Business Software & AI hub
Sources and reference points
- France Num — digital transformation for SMEs
- CNIL — AI, data and compliance guidance
- ANSSI — cybersecurity publications
- European Commission — AI regulatory framework
French version: Combien coûte un prototype digital ? Ce qui fait vraiment varier le budget
