Capsa AI, a London and New York startup building what it calls an “AI operating system” for private capital, has raised $18M in Series A funding. The round was co-led by TX Ventures and Pivot Investment Partners, with participation from Bek Ventures, and takes the company's total raised to $20M.

Every existing institutional backer reinvested, including Antler, Outward VC, and Cornerstone, alongside angels such as Indeed co-founder Paul Forster.

Founded in 2024, Capsa indexes a fund's scattered data, the CRM entries, Outlook threads, SharePoint files, and deal memos, into a single searchable layer. The pitch is that decades of institutional knowledge, currently locked in PDFs and inboxes, become instantly queryable, with agentic AI running across sourcing, due diligence, portfolio monitoring, and back-office work.

The underlying problem is real. Private capital manages more than $15tn in assets, the company says, yet much of it is still tracked in spreadsheets and email, and investment staff lose hundreds of hours a year to manual search, a drag Capsa puts at $35bn a year across the industry.

Assets have tripled since 2015 while data volumes keep doubling, and teams have not grown to match.

Private equity is the next vertical-AI bet

Capsa is riding a clear pattern: purpose-built AI for a single profession. Law firms got Harvey and Legora, accounting and advisory are being reshaped the same way, and enterprise finance is shifting from chatbots to agentic systems. Private equity, data-heavy and willing to pay, is an obvious next target.

“Private capital is one of the most data-intensive industries on earth, and it has been chronically underserved by technology,” said Danyal Oezduezenciler, Capsa's co-founder and chief executive, who worked on more than 50 due-diligence processes at AEA Investors, Citi, and Deutsche Bank before starting the company with Callum Downie.

The growth figures are striking, though all are the company's own: 14 times year-on-year revenue growth, a 100 per cent renewal rate, and net dollar retention above 122 per cent, from a team of just 14. Capsa says it is already in production at several of the world's largest private capital firms, though it has not named them.

Winning that trust hinges on security: the company says it is SOC 2 Type II certified, offers single-tenant hosting, and does not train on client data, the gating requirement for firms wary of exposing their most sensitive deal records. The new money will fund US expansion and hiring across engineering and sales.

The open question is defensibility.

Capsa's edge is a tuned workflow and a fund's own indexed data, not a model it owns, and the same foundation-model providers powering it are climbing up the stack. Whether a vertical knowledge layer for private equity becomes a moat, or a feature the incumbents absorb, is the bet this round is funding.