What do you need built?
Pick the closest fit. It does not have to be exact, and the list is what comes up most rather than the limit of what we build.
Tell us about it.
The problem you're solving, what exists today, what "done" looks like. Rough notes are genuinely fine.
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Ballpark budget?
This only shapes the first conversation. It is not a commitment, and "not sure" is a normal answer.