DeelZone - An interface designed to give away nothing
Two parties in a settlement both know a number they'd accept. Neither will say it first, because in a negotiation, the number you name becomes the ceiling you're bargained down from. So the deal that both sides would happily sign never gets found.
DeelZone breaks that by comparing without revealing. Each side enters a threshold privately. If the ranges overlap, both are told a zone exists and nothing more.
The design problem was restraint. A product built on withholding cannot have an interface that looks like it's watching you. So the system was built to feel like a quiet room rather than a tool: sage and bone instead of fintech blue, a soft dotted moiré field instead of charts, and a hard rule that no screen ever displays a figure the other party could infer.
The result screen is where the whole idea lands. Two spheres, one pale and one deep, overlapping just enough. No numbers, no gap measurement, no percentage of agreement. Just the overlap, and two next steps mark as settled, or notify a mediator.
The mark holds the same logic: a speech bubble and a leaf occupying one shape. Two things sharing space without either being erased.
Restraint is the feature. The design just had to stop arguing with it.