Slash vs Stark Bank
Side-by-side comparison of AI visibility scores, market position, and capabilities
API-first corporate card and global payments platform for high-spending businesses; $60.1M raised with $41M Series B, $3B annualized volume in 2025 competing with Brex and Ramp for programmable spend management.
About
Slash is a Los Altos-based fintech company providing comprehensive financial services and corporate cards for high-spending businesses — offering global payments, programmable corporate cards, real-time payment rails, spend management APIs, reconciliation, and detailed reporting that financial operations teams at high-growth companies and high-volume businesses need to manage complex payment workflows. A Y Combinator W21 graduate, Slash raised $60.1 million total including a $41 million Series B in May 2025 led by Goodwater Capital with New Enterprise Associates and Menlo Ventures participation, surpassing $3 billion in annualized volume in 2025 (up from $1 billion in 2024).
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.
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