What Square actually is, and why so many restaurants use it
Square launched in 2009 with the original Square Reader (the white dongle that plugged into an iPhone's headphone jack) and became, over the next decade, one of the most recognizable payment brands in the United States. The parent company renamed itself Block, Inc. in December 2021 to reflect a broader fintech portfolio that includes Cash App, Afterpay, and TBD, but the Square brand still owns the restaurant and merchant POS surface.
For restaurants, Square offers a hardware family that spans cheap to enterprise: the Square Reader for mobile payments, the Square Stand that turns an iPad into a countertop register, the Square Terminal as an all-in-one handheld, the Square Register as a dedicated countertop unit, and Square Kiosk for self-order at quick service. On top of that hardware, Square for Restaurants is the restaurant-specific software tier, with a Free plan that covers basic POS, a Plus plan that adds advanced floor plans, courses, server reports, and KDS, and a Premium plan for larger operators.
What makes Square distinctive among POS vendors is the contract policy. Square publishes flat processing rates and does not lock restaurants into multi-year merchant services contracts. Setup is fast, the hardware works out of the box, and an independent operator can be up and running on Square in an afternoon. That is why Square has become the default POS for so many cafes, food trucks, fast-casual concepts, and independently owned full-service restaurants.