Flex vs Cash App
Side-by-side comparison of AI visibility scores, market position, and capabilities
US YC S23 HSA/FSA payment infrastructure for DTC health brands; $18M total ($15M First Round/Core VC Series A Sep 2025 + $3.2M seed) enabling Stripe-like online pre-tax health spending competing with Truemed for $150B HSA/FSA market.
About
Flex is a United States-based HSA/FSA payment infrastructure platform — backed by Y Combinator (S23) with $18 million in total funding including a $3.2 million seed in September 2024 from Y Combinator, SV Angel, Precursor Ventures, and Liquid 2 Ventures, plus a $15 million Series A in September 2025 led by First Round Capital and Core VC with Cameron Ventures, Rethink Impact, and Y Combinator — providing direct-to-consumer health and wellness brands with Stripe-like payment processing infrastructure that enables online acceptance of HSA (Health Savings Account) and FSA (Flexible Spending Account) funds from the $150+ billion annual pre-tax healthcare spending market. Founded in 2023 by Sam O'Keefe and Miguel Toledo, Flex targets the DTC health and wellness brands that cannot currently accept HSA/FSA payments online because of technical and compliance barriers.
Block Inc. (NYSE: SQ) digital banking at 57M MAU generating $16.25B 2024 revenue (half of Block); Bitcoin trading 62% of revenue with Moneybot AI and Lightning Network competing with Venmo and Chime for Gen Z financial services.
About
Cash App is a San Francisco, California-based digital banking and payments platform — operated by Block, Inc. (NYSE: SQ, formerly Square) — providing 57 million monthly active users with a comprehensive mobile financial services ecosystem including peer-to-peer payments, Cash App Card debit card (24 million users), Bitcoin and fractional stock investing, direct deposit banking, tax filing, and personal loans. In 2024, Cash App generated $16.25 billion in revenue (13.2% year-over-year growth) and processed $282.9 billion in customer inflows — representing half of Block's total revenue with Bitcoin trading comprising 62% of Cash App's revenue stream. Cash App's AI expansion includes Moneybot (an AI-powered financial navigation assistant) and Bitcoin Lightning Network payments using USD balance, with stablecoin support in development. Launched in October 2013 as "Square Cash" by Jack Dorsey and Brian Grassadonia.
AI Visibility Head-to-Head
Key Details
Also Compare
Track AI Visibility in Real Time
Monitor how your brand performs across ChatGPT, Gemini, Perplexity, Claude, and Grok daily.