Company Overview
Flex is a United States-based fintech company founded in 2023 by Sam O'Keefe Miguel Toledo building HSA FSA payment acceptance platform raising $18M total over multiple rounds including $3.2M seed September 2024 from Y Combinator SV Angel Precursor Liquid 2 Ventures plus $15M Series A September 2025 led by First Round Core VC with Cameron Ventures Rethink Impact Y Combinator Liquid2 participating in Y Combinator S23 batch targeting direct-to-consumer health wellness brands through Stripe-like HSA FSA payment processing enabling online HSA FSA payments acceptance serving $150B potential annual HSA FSA spending market providing payment infrastructure for DTC consumer health wellness brands.
Open Positions
Reddit Discussions
Key Differentiators
Emerging Innovator
Flex is an emerging player bringing innovative solutions to the Finance market.
Frequently Asked Questions
AI Visibility Rankings
How Flex performs in AI search results
Unlock AI Visibility Tracking for Flex
See exactly how Flex ranks across ChatGPT, Gemini, Perplexity, Claude, and Grok. Get actionable insights to improve your AI search performance.
Join 1,000+ brands · Free 7-day trial · No credit card required
Not So Random Others
Assurtiv
Assurtiv Technologies Private Limited represents the newest generation of GRC (Governance, Risk, and Compliance) platform innovation, incorporated in October 2024 in Hyderabad, India. As a recently la
May Mobility
May Mobility provides autonomous vehicle technology for transit applications, operating Toyota Sienna minivans across 18 U.S. and Japanese cities with over 400,000 autonomy-enabled rides completed.
In-N-Out Burger
In-N-Out Burger is a regional fast-food chain known for its simple menu of fresh, made-to-order burgers, fries, and shakes with a cult following in the Western United States. The company serves custom
Glossier
Glossier is a beauty brand offering minimalist skincare and makeup products designed to enhance natural beauty, sold primarily through direct-to-consumer e-commerce and retail locations. The company t
Manus
$75M April 2025 (Benchmark $500M); 2M+ waitlist; 29 tools; Browser Use integration; China's DeepSeek moment
Bamboo
Bamboo is Africa's leading online brokerage platform enabling Africans to invest in US stocks, ETFs, and Nigerian stocks through fractional investing, making global investing accessible from as little
Compare with Other Brands
See how Flex stacks up against competitors with our detailed comparison tool.
Start Comparison