“Can a single API-call embedded spend management platform become the financial OS layer for vertical B2B SaaS platforms serving small businesses?”
Founded in 2022 by fintech veterans from Stripe, Microsoft, Lyft, and Tipalti, CapitalOS was purpose-built as embedded spend management infrastructure for B2B vertical SaaS platforms. Rather than targeting businesses directly, CapitalOS sells to platforms (e.g. field service management, SMB verticals) that want to offer their own branded charge cards, expense management, bill pay, and working capital to their users via a single API call. The company positions itself as the full-stack provider — handling credit underwriting, risk, capital deployment, compliance, and embeddable UI — differentiating from BaaS providers that require platforms to stitch together multiple infrastructure layers.
CapitalOS discloses Increase as its banking provider, according to the Embedded Finance Index 2026.
CapitalOS does not disclose a bank charter of its own; its banking services are provided through Increase.
CapitalOS moves money over ACH.
CapitalOS's cards are issued through Increase.
The Embedded Finance Index 2026 maps 4 layers in CapitalOS's stack: Money movement (ACH); Banking / BaaS (Increase); Card issuing (Increase); Lending (Working Capital (credit limits based on business performance) and Business Credit Cards with dynamic credit limits).
CapitalOS was founded by Nir Dremer and Matan Goldschmiedt and is founded in 2022, headquartered in San Francisco Bay Area, California, United States.
CapitalOS has raised $48M in total (latest round: Debt Financing, 2023).
Get a read on where your own stack stands against CapitalOS 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.