How the fast-growing AI fintech is building a unified financial platform designed to empower mid-sized businesses and modernize business finance
Flex, a San Francisco-based AI fintech startup, has raised $60 million in new funding led by Portage Ventures, lifting its valuation to about $500 million. The round brings the company’s total equity raised to $105 million, fueling its next stage of growth.
With the new investment, Flex plans to accelerate product innovation, expand its platform capabilities, and grow its 80-person team.
Filling a Major Gap in Business Finance
Flex is targeting an overlooked segment: mid-sized businesses earning between $2 million and $100 million a year. These companies are too large for small-business tools yet not big enough to receive private banking-level attention.
According to Flex founder Zaid Rahman, today’s fintech tools often fail to scale with the needs of this group, while regional banks struggle to provide modern digital experiences. Flex aims to bridge that divide.
Instead of offering one-off services, the company blends private credit, business banking, treasury tools, personal finance management, and payments into one unified platform. With everything operating in a single ecosystem, business owners no longer need to juggle multiple vendors.
Automation With Human Oversight
Many automation pilots fail due to accuracy issues and low adoption. An MIT study earlier this year found that only 5 percent of new tech pilots grow into long-term production.
Flex is taking a different approach. Every automation output is reviewed by financial specialists, ensuring accuracy and helping users trust the system.
The results speak for themselves. Flex reports that payment volumes hit $3 billion in the past year, tripling in just 12 months as more customers adopt its business credit tools.
Premium Card and Future Expansion
Flex is now expanding into the personal finance layer of the business owner ecosystem. The company is preparing to launch Flex Elite, an invite-only consumer card designed to compete with high-end products like the Amex Centurion.
Aimed at high-net-worth clients, the new card could strengthen Flex’s position and deepen loyalty among top-tier users.
As competition increases across business finance, Flex is betting that a unified, trustworthy platform will become the preferred operating system for forward-thinking mid-sized businesses.
Conclusion
Flex’s bold push into unified financial management signals a major shift in how AI fintech can support ambitious companies. If you found this story insightful, share it with your network, leave a comment, or follow for more updates on the future of business finance.
