Square

Square links payment processing with tools for running a small business, particularly when sales happen both in person and online. Its point-of-sale software works with Square payment hardware, while online selling tools provide another route to customers. Keeping these functions within the same system can simplify the work of businesses that otherwise manage separate checkout and retail services. The hardware and software are designed around everyday merchant tasks rather than requiring a custom payment integration.

This makes Square relevant to shops and service businesses seeking a practical way to accept payments and track sales. Free software options should not be confused with free card processing: transaction fees generally apply, and any promotional credits have separate conditions. Its main distinction is the connection between merchant-facing software, physical payment devices and online commerce.