TecBan - the machines belong to nobody in particular

The founding logic is the whole entry, and it is a networking argument in a banking costume. Three banks pooled infrastructure because the three largest - Banco do Brasil, Bradesco and Itau - were the only ones that could each afford a national machine network alone. Sharing was not a philosophy; it was the only way the smaller institutions could offer the same service.

That is the same calculation behind every internet exchange, every shared trunk and every peering agreement on this timeline: below a certain scale, building your own is more expensive than agreeing with your competitors. What is unusual is how visible the result became - the mosaic of bank logos on the front of a red machine is a peering agreement that ordinary people look at every day without recognising it.

The physical half is worth stating too, because a network is not an abstraction. TecBan describes journeys of up to fourteen hours by boat to reach machines in remote parts of the Amazon. Every argument about availability targets eventually meets a river.

It also has a telecommunications arm, TBNet, alongside the cash-in-transit and integrated services units - so the company that shares the machines also runs the network they talk over, which is the ordinary answer to what a financial network actually consists of.