Stark Bank vs Block
Side-by-side comparison of AI visibility scores, market position, and capabilities
São Paulo Brazil YC W20 open banking API at 155B BRL ($31B) payments 2023 with 3x YoY growth and doubled net income; $58.2M total ($45M Ribbit/Bezos Series B 2022) serving Gol/Localiza/QuintoAndar competing for Brazil fintech infrastructure.
About
Stark Bank is a São Paulo, Brazil-based open banking API platform and digital business bank — backed by Y Combinator (W20) with $58.2 million in total funding including a $45 million Series B in April 2022 led by Ribbit Capital with Lachy Groom and Bezos Expeditions (Jeff Bezos's personal investment vehicle) — providing companies with payment processing infrastructure, banking APIs, and financial services built on Brazil's open banking framework. In 2023, Stark Bank processed 155 billion reais ($31 billion USD) in payments (3x year-over-year growth), doubled net income to 71.5 million reais, and serves 600+ enterprise clients including Gol Airlines, Localiza, Ultragaz, Loft, and QuintoAndar. Founded in 2018 by Rafael Stark.
San Francisco fintech (NYSE: SQ) added to S&P 500 July 2025; Cash App $5.0B gross profit, Square $3.7B, Afterpay BNPL integration, Jack Dorsey CEO competing with PayPal/Venmo and Stripe for merchant and consumer fintech.
About
Block, Inc. is a San Francisco, California-based financial technology company — publicly traded on the New York Stock Exchange (NYSE: SQ) as an S&P 500 Information Technology component (added to the S&P 500 on July 23, 2025, replacing Hess Corporation) — operating two primary financial platforms: Square (merchant payment processing, point-of-sale hardware, and business banking for small-to-mid-size merchants) and Cash App (peer-to-peer payments, digital banking, stock investing, and Bitcoin transactions for individuals) alongside Afterpay (buy now pay later), Tidal (music streaming), and TBD (decentralized finance), through approximately 12,000 employees. CEO Jack Dorsey (co-founder with Jim McKelvey in 2009 as Square, rebranded to Block in December 2021) leads the company's strategy of building an interconnected ecosystem of financial services that connect individual consumers (Cash App) with merchants (Square) and the broader financial ecosystem. In fiscal year 2024, Block reported gross profit of approximately $8.9 billion, with Cash App generating approximately $5.0 billion in gross profit (+14% year-over-year) driven by Cash App Card, direct deposit adoption, and Cash App Pay, while Square generated approximately $3.7 billion in gross profit (+9%) driven by software and banking products alongside payment processing. Block acquired Afterpay for $29 billion in January 2022 — integrating the Australian buy-now-pay-later platform into both Square (merchant installment offer at checkout) and Cash App (consumer Afterpay integration).
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