A tiny card reader became Cash App, Square and Block: how Jack Dorsey’s payments company kept expanding
Jack Dorsey and Jim McKelvey founded Square in 2009 after McKelvey, a glass artist, encountered difficulty accepting a card payment from a customer.
The first Square reader plugged into a smartphone and gave small merchants a simple way to accept card transactions without conventional point-of-sale infrastructure.
The early business looks very different from the company visible today. Following the milestones in order shows which decisions changed Block’s direction and which capabilities remained constant.
The white card reader made payments hardware approachable
Square combined inexpensive hardware with software, merchant onboarding and payment processing, lowering the barrier for small businesses and individuals to accept cards.
The transaction mattered because it changed the shape of Block rather than simply adding revenue. It brought additional technology, customers, geographic reach or operating capability into the group and influenced the next stage of its strategy.
Cash App created a consumer network beside the merchant business
Originally launched as Square Cash, Cash App evolved from person-to-person payments into a broader consumer financial platform including debit cards, investing and Bitcoin features.
Marketplace businesses become stronger when buyers, sellers and supporting services reinforce one another. This step gave Block another way to deepen that network rather than relying on a single transaction type.
The 2015 IPO put two-sided financial infrastructure on public markets
Square went public in 2015 and continued adding payroll, business software, lending and commerce tools around its merchant ecosystem.
For Block, access to public markets was more than a branding milestone. It increased financial transparency and created another route to fund expansion, acquisitions or long-term product development.
The 2021 Block name acknowledged a business no longer defined by one shape
Square, Inc. changed its corporate name to Block while retaining Square as the merchant brand. Acquisitions such as Afterpay and investments in Bitcoin infrastructure widened the parent company’s scope.
The AI era increased the value of capabilities Block had already been developing. Compute, data, networking, software or infrastructure that once served narrower workloads became relevant to much larger AI systems.
The square reader became a portfolio of financial networks
As of 18 September 2026, block now operates multiple financial and commerce businesses including Square, Cash App and Afterpay. The founding card reader remains important historically because it established the company’s pattern of using consumer-grade design to simplify financial infrastructure.
The company’s current position is therefore the result of accumulated technical and commercial choices rather than one breakthrough product. That is the context future coverage should preserve.
For TechnologyBlog.co.za, this page is intended to serve as the company-history cornerstone for future Block coverage, so product and company-news articles can link back to one factual brand background instead of repeating the full origin story.
Historical facts were checked against Block corporate history, founder accounts and public filings. Information reflects public material available on 18 September 2026.
