Square + Shuttle

Square has evolved from a mobile card reader into a comprehensive commerce platform serving millions of businesses across the United States, United Kingdom, Canada, and Australia. Its payment processing supports card-present and card-not-present transactions with a flat-rate pricing model that appeals to small and mid-sized merchants who prefer predictable costs over interchange-plus structures. Beyond processing, Square offers a full suite of business tools — point of sale, inventory management, payroll, banking, and customer engagement — creating an ecosystem that many merchants are deeply invested in. Square’s developer APIs also enable custom integrations, making it viable for platform-level use cases.

Shuttle’s integration with Square enables platforms to include Square as a processing option within their multi-PSP payment infrastructure. Through Shuttle’s Embedded Payments, a platform can route transactions to Square for merchants who prefer Square’s ecosystem and pricing while directing other merchants’ transactions to different processors. This is particularly valuable for platforms in the retail, food service, and professional services verticals where Square has strong merchant adoption. Voice Checkout sessions processed through Shuttle can utilize Square’s payment processing for phone-based transactions, and Payment Links can settle through Square when that is the merchant’s designated processor.

The strategic value of accessing Square through Shuttle lies in meeting merchants where they already are. Many small businesses have chosen Square as their primary payment provider and are reluctant to switch to an unfamiliar processor just because they adopt a new software platform. By connecting to Square through Shuttle, platforms can onboard these merchants without forcing a processor change, reducing friction in platform adoption. At the same time, the platform retains the flexibility to route transactions to other PSPs when Square is not the optimal choice — for example, when a merchant needs international acquiring capabilities or industry-specific processing that Square does not support. Shuttle handles the routing logic, settlement normalization, and failover between Square and other connected processors automatically.