AI banking startup Flex raises $70M, doubling valuation to $1.2B in six months

What's the deal? Flex, an AI startup pitching itself as a one-stop shop for the banking needs of mid-sized business owners, has raised $70 million in a Series B extension. Halo Fund led the round, joined by returning investors Portage Ventures and Crosslink Capital.

Why now? A person close to the deal said the round valued the three-year-old startup at around $1.2 billion — more than double its valuation six months ago. The quick re-raise underscores investor appetite for AI-driven fintech targeting an underserved segment.

What's the endgame? Flex is going after what chief executive officer Zaid Rahman calls "jumbo shrimps" — mid-sized businesses earning tens to hundreds of millions of dollars in annual revenue, overlooked by traditional fintechs and mainly served by regional banks. "Globally, it's about 3 million business owners that manage 50% of the global economy," Rahman told Reuters. Unlike rivals chasing single tasks such as accounting, Flex bundles private credit, business finance, personal finance, and payment tools into one platform, plus AI agents like Beacon AI that give owners a weekly read on their finances.

By the numbers: Flex has now raised $180 million in equity and $300 million in debt. It reports a few thousand customers onboarded and roughly four-fold year-over-year growth at a nine-figure annualised revenue run rate.

What's next? The new funds will expand Flex globally, lift marketing, and more than double headcount to over 200 by year-end from 110. Separately, the company launched Flex Global, a service that uses stablecoins to move money across more than 100 countries in minutes and lets business owners hold 32 currencies.

The signal: Flex's rapid re-raise signals that investors see room for AI platforms consolidating fragmented financial tools for a mid-market long served by regional banks.

Image credit: Generated with Gemini