How much does application development cost in 2026: agency, freelancer or AI?

An agency charges a median €30,000, a freelancer €8,000 to €20,000, and an AI agent team a few dozen euros per month. The full picture: what each option buys, and when each remains the right choice.

In 2026, having an application developed costs a median of around €30,000 through a French agency (La Fabrique du Net survey), €8,000 to €20,000 through a freelancer depending on scope, and a few dozen euros per month through an AI agent team you direct yourself. Across those orders of magnitude, you are not buying the same thing.

What you buy from an agency

An agency sells a team: project manager, designer, developers and testers. It takes your vague need and returns a finished product, with a contract and recourse. It is the right choice when the application carries a heavy regulatory burden, a large user base from day one, or when nobody in your organisation can devote time to the project. The €30,000 median pays for French salaries and human coordination. Some agencies acknowledge that AI has cut their production costs by a factor of five to ten; public prices are falling more slowly.

What you buy from a freelancer

A freelancer costs less and moves faster within a clear scope. The risk is structural: one person means one schedule, one technical opinion and fragile continuity when they move on. Delivered code is rarely documented for someone else. If you take this route, require two things in writing: a requirements document approved by you before the first line of code, and full ownership of the repository.

What you buy from an AI agent team

The third route emerged in 2025 and became structured in 2026: AI agents write the requirements, code and tests, and you direct them. The cost changes by an order of magnitude: an AI assistant subscription (around €20 per month) and the orchestration tool. With Maestro, free during beta, a complete product consumes a few euros in artificial intelligence tokens: we publish these costs, measured on real projects, because nobody else does.

This route does not provide someone to decide for you: you approve the brief, specification and every stage. That is real work, one to two hours a day in the first few days. In exchange, you understand your product line by line; an agency keeps that understanding in-house.

The real criterion: who understands the product at the end?

The hidden cost in all three options is dependence. An application whose rules nobody in your organisation understands is rebuilt from scratch with each provider. That is why Maestro makes the specification central to the work: the document saying what your product does, approved by you, remains your property and your memory. Code can be regenerated; understanding should not be bought twice.

In practice

A budget under €500 and a desire to direct: start with an agent tool. €8,000 to €20,000 and a clear scope: a good freelancer, with approved requirements. Over €30,000, critical stakes and no available time: an agency, asking who will own the specification at the end.