Square provides accessible, integrated payment processing and business management tools that enable businesses of all sizes to accept payments, manage operations, and grow their customer base through a unified platform.
Last updated Feb 18, 2026
Leading payment processing and commerce platform for small to medium-sized businesses
Square, now operating under the parent company Block, Inc., is primarily a financial services and payment processing company rather than a traditional AdTech platform. While it offers some marketing and customer engagement tools as part of its commerce ecosystem, characterizing it as an AdTech company is inaccurate. Founded by Jack Dorsey and Jim McKelvey in 2009, Square revolutionized payment processing for small businesses with its card reader that plugs into smartphones. The company has expanded into a comprehensive suite of business tools including point-of-sale systems, e-commerce, payroll, and financial services. Square Marketing provides email marketing and customer engagement capabilities, but these are ancillary features within a payments-first platform that serves millions of businesses globally, from individual sellers to larger enterprises.
Mobile and countertop POS system for accepting payments and managing sales
E-commerce platform for building online stores and selling products
Email marketing and customer engagement tools integrated with payment data
Payroll processing and tax filing services for employees and contractors
Business loans and financing based on sales history
Scheduling and booking software for service-based businesses
Specialized POS system for restaurant operations
Invoice creation and payment collection tools