A traditional agency migration is quoted as a project. Discovery, mapping, data work, SEO, store build: in practice that lands somewhere between eight and fifty thousand euro, and the range is mostly a function of how surprised everyone gets halfway through.
The hidden cost is not the invoice, it is the hours on your side. Checking exports, retyping products, answering questions about fields nobody documented, and the revenue lost in a launch week that went sideways.
Our answer is a product price instead of a project price. The Syncer app runs at €259 per month, and Assist, our fully assisted migration, starts from €2,500.
That is not cheaper for its own sake. It is predictable, which is what a board actually asks for when it approves a replatform.