CapitalOS raises $21.9 million Series A led by LGVP

CapitalOS has raised $21.9 million in a Series A led by LGVP, and it is not another corporate card aimed at a chief financial officer (CFO). Having tracked embedded finance into the software that already owns the job, the point is distribution. CapitalOS is selling a finance team's work to the business-to-business (B2B) platforms small firms already use, instead of signing those firms up one by one. The October 21, 2026 release, datelined San Francisco, says WEX Venture Capital, Group11, Great North Ventures and Night Capital joined, with existing investors unnamed.

The accounts do not agree on scale. The wire says CapitalOS is trusted by dozens of B2B platforms, has over 25,000 cardholders, and is orchestrating billions in transaction volume, up 1,000% over the last 18 months. The company's own news post, the same day, says volume has grown more than 20x. Great North Ventures called it roughly 10 times. This piece uses the wire's 1,000% and does not average the three.

What the Series A is for

CapitalOS calls the product money orchestration: cards, bill pay, wallets and receivables. Its news post says a platform can ship those four primitives in days, because CapitalOS takes underwriting, compliance, risk and money movement. The release says a capital agent funds transactions, so the software firm does not warehouse the float behind each swipe.

Related:Plinto raises €2.9 million pre-seed for finance controls

Nir Dremer, co-founder and chief executive, said the buyer is a vertical software-as-a-service (SaaS) or artificial intelligence (AI) platform, not a finance department. "Vertical SaaS & AI platforms are experts in their domains, not building payments infrastructure," he said in the release. "Our goal is to build the best financial infrastructure so any platform company can offer their end customers world class financial products." The release says he was a general manager at Stripe and at Tipalti. CB Insights says the company was founded in 2022.

Customers in, issuers quiet

Itai Tsiddon, general partner at LGVP, led the round and joined the board, Great North wrote. "CapitalOS lets them launch financial products in days, and with more than 10x growth as AI accelerates demand, we're excited to lead this round and partner with CapitalOS," he said in the release. Jay Dearborn, chief operating officer, international, and chief strategy officer at WEX, whose venture arm joined, said: "What makes CapitalOS compelling is its approach to connecting that intelligence with the financial infrastructure businesses need, without requiring platforms to build and manage that complexity themselves."

Dremer told Great North, in a profile dated August 27, 2026 and updated for the round, why a direct sale fails. "Acquiring very small businesses one at a time is expensive, and products designed for the CFO office do not suit businesses that are less sophisticated financially," he said.

Jonathan Ferber, head of business programs operations at Guesty, said in the release: "CapitalOS gave us the robust, yet flexible infrastructure we needed to launch a card product that is 10x better than any traditional banking platform, embedding it directly into our users' daily operations." Great North wrote that Guesty reports an 85% retention rate within its card ecosystem. Beam went live in about a week. Adam Eagle, founder and chief executive, said contractors are "saving 5-8 hours every week on expense tracking alone," and the note says they avoid or recover about 5% of project costs per job.

Workiz, used by more than 110,000 service professionals, embedded cards and job-level credit in one week, the note says. A quarter of new users adopt spend tools at signup, and customers reported an average 5% cut in project costs. CapitalOS data cited there shows a 3% to 5% saving on spend through the system.

No page opened here quotes Lithic, Marqeta or a direct spend brand on the round. CB Insights places CapitalOS beside card issuers and lists Lithic first, a New York firm founded in 2014. The same choice is already on this desk: Stripe's deal for embedded-finance firm Parafin, Ramp's direct spend raise, Ambrook's vertical round, Marqeta's move into money-movement rails, and Cross River's embedded-finance commitment to embedded finance. None of them mentions this round.

What the round has to prove

If one-by-one sales are too expensive, the open question is whether a platform will let outside agents approve credit and move cash under its brand. Great North says CapitalOS is going after larger platforms, including an unnamed first public-company customer, and a larger engineering team. The announcement names no valuation, no sponsoring bank and no credit warehouse.

WEX is the awkward name on the list. A payments company's venture arm can distribute this, or learn the workflow and build it. Nothing dated October 21 says which. "What used to require a finance team at a large company can now be built into software a small business already uses," Dremer told Great North.