A custom web application costs from a few tens of thousands of euros for a first product to several hundred thousand for a full platform.
Typical ranges (French market, agency work)
- MVP: €20,000–50,000
- Business application: €50,000–150,000
- Platform (multi-party extranet, public APIs, many integrations): above €150,000
Experienced agency developers in France usually bill €500–800 per day.
Cost items
Scoping and design, development, integrations (see build or buy connectors), security and compliance, deployment and hosting.
After launch
Usually 15–20% of the initial cost per year for maintenance; a stable framework lowers it — see why Symfony.
An application’s price says nothing about its cost; only lifetime cost matters.
Control the budget
Two-week increments, an MVP first, ruthless prioritisation, code ownership — and check a market tool is not enough: build or buy software.
Custom web application cost: FAQ
Can we get a fixed price?
For a well-scoped phase, yes. For a vague project, scope first, then price each phase.
Why do quotes vary so much?
They do not cover the same scope: tests, security, documentation, data migration or maintenance may be missing. Compare item by item.
Request a quote
Our Symfony agency costs your application phase by phase. Request your quote.