“Can a construction-turned-fintech startup become the AI-native financial OS that unifies business and personal finances for mid-market entrepreneurs?”
Founded in 2019 as Flexbase Technologies, a construction-industry platform automating AIA billing and connecting contractors to lenders. By 2022, CEO Zaid Rahman pivoted the business toward a broader fintech model targeting business owners, shedding the construction-specific label. Launched in stealth as a business credit card + expense management tool in 2023, then expanded aggressively into business banking (Thread Bank), revenue-based lending (Flex Capital), AP automation, and global payments — positioning as an 'AI-native all-in-one finance platform for entrepreneurs' competing with Brex and Ramp.
Flexbase (flex) discloses Thread Bank as its banking provider, with Member FDID / Lead Bank as its sponsor bank, according to the Embedded Finance Index 2026.
Flexbase (flex) does not disclose a bank charter of its own; its banking services are provided through Member FDID / Lead Bank.
Flexbase (flex) moves money over ACH and Wire.
Flexbase (flex)'s cards are issued through Lead Bank.
Flexbase (flex) integrates with QuickBooks, Xero, NetSuite, Oracle NetSuite, Amazon and Meta.
The Embedded Finance Index 2026 maps 7 layers in Flexbase (flex)'s stack: Money movement (ACH and Wire); Banking / BaaS (Thread Bank); Card issuing (Lead Bank); Lending (Flex Capital (revenue-based financing / growth capital), Net-60 Business Credit Card (60-day float, 0% interest) and Flex Credit (net-60 credit line, scalable based on revenue)); Sponsor bank (Thread Bank and Member FDID / Lead Bank); Accounting (QuickBooks, Xero, NetSuite, Oracle NetSuite and 2 others); Treasury (Thread Bank (up to 2.47% APY on business checking)).
Flexbase (flex) was founded by Zaid Rahman and is founded in 2019, headquartered in Miami, FL.
Flexbase (flex) has raised $105M+ (equity) + $200M credit facility in total (latest round: Series B, 2025; valuation: ~$250M post-money (Series B context, 2025)).
Get a read on where your own stack stands against Flexbase (flex) and the rest of its category — what they built versus bought, which providers they use, and where the gaps in your own strategy and competitive set actually are.