Slash

Slash is a San Francisco business banking platform that combines checking accounts, corporate cards, expense management, and accounting for high-spend companies, and this launch adds the piece that was missing from that stack. Slash Financial launched payment processing to enable approved merchants banking with Slash to accept debit and credit card payments from customers, available through two surfaces: native card acceptance in Slash Invoicing, and a Software Development Kit for custom web checkout and payment flows. The infrastructure is provided through a partnership with Whop, which handles merchant onboarding, settlement, and the regulated processing layers while Slash owns the merchant-facing experience. For founders and operators, the practical shift is that inbound revenue now lands in the same account they spend from, with invoice and SDK payments visible in one dashboard alongside refunds, fee breakdowns, and receivables context. Payment processing is initially available to businesses operating in e-commerce, telehealth, software, and service agencies in spaces such as marketing, advertising and consulting. That scope signals who Slash is prioritizing first, namely digitally native merchants who currently juggle a processor, a bank, and an accounting sync that never quite lines up. The launch is being led by co-founder and CEO Victor Cardenas, with product framing from Andy Jiang, Head of Product. Cardenas has described the goal as becoming the financial operations system that businesses can rely on , and closing the payments-in gap is the clearest step yet toward that positioning, particularly for a company that has publicly acknowledged the industry-wide gap between "all-in-one" marketing and the reality of stitched-together fintech stacks.