73 Strings Acquires Callisto for Private Markets AI

73 Strings, a prominent player in AI-driven valuation and portfolio intelligence for alternative asset managers, has significantly expanded its agentic AI capabilities through the acquisition of Callisto. This strategic move, which integrates Paris-based Callisto's specialized financial AI technology, is set to accelerate the development of sophisticated investment workflows within 73 Strings' platform. The integration aims to automate critical processes such as due diligence, financial data analysis, and valuation simulations, enhancing efficiency for private markets participants.

The acquisition injects Callisto's proprietary agentic data pipelines and AI agents, adept at navigating complex financial documents and databases, into the 73 Strings ecosystem. This technology is designed to tackle the labor-intensive nature of private equity and private credit operations, automating tasks that traditionally demand extensive manual effort. By incorporating Callisto's expertise, 73 Strings is reinforcing its commitment to building a comprehensive AI infrastructure tailored for the alternative asset management sector.

A key focus of the integration will be the development of an AI-native platform where agents can operate seamlessly through the Model Context Protocol (MCP). This will empower AI agents to access and process financial information, execute intricate investment workflows, and interact directly with 73 Strings' existing valuation and portfolio management tools. The company emphasizes a hybrid approach, where AI accelerates data preparation and analysis, but final valuation decisions remain subject to human oversight and deterministic calculation engines, ensuring governance and traceability.

Looking ahead, 73 Strings plans to introduce advanced AI-powered simulations into its 73 Intelligence platform. This new functionality will enable investment managers to model portfolio performance, asset valuations, and fund-level financial outcomes under various macroeconomic scenarios. The company anticipates that complex analyses, previously requiring weeks of manual work, could be completed in minutes, yielding auditable results and supporting more agile capital allocation and risk assessment decisions.

The integration of Callisto's engineering team, including its founders Charles Farhat and William Profit, who will now co-lead AI Product at 73 Strings, marks a significant enhancement of the company's AI development capacity. This move follows a broader recruitment drive for top engineering and product talent. 73 Strings currently serves a substantial portion of the private capital market, overseeing over $20 trillion in assets under management, including a majority of the top 10 private capital firms globally.

This acquisition follows 73 Strings' substantial $55 million Series B financing in February 2025. That round was led by Goldman Sachs Alternatives and saw continued participation from Blackstone Innovations Investments, alongside key investors such as Golub Capital, Hamilton Lane, Broadhaven Capital, and 7RIDGE. HSBC Innovation Banking also provides support to the company.