# Rails

The right transaction and rail for each payment, on the record.

Write the rules: by account range, card type, region, amount or time. For each payment, insimbi curates the transaction and picks the rail your rules allow, among the networks and rails we connect to directly: the one that costs least for that card or best fits your business. We show the arithmetic and the rule before the authorization goes out.

Every choice is written to the record with the rule that made it, so you can review it, diff it and roll it back. New rails reach you without a new integration.

This is not orchestration across processors. We never stack our product on another PSP.