73 Strings Buys Callisto to Boost Agentic AI for Private Markets

73 Strings has acquired Callisto, a deal the company frames as a decisive step in expanding its agentic artificial intelligence capabilities for the private markets.

The buyer, 73 Strings, builds finance intelligence and automation software used by fund managers, lenders and advisory firms. The company confirmed the acquisition through a citybiz announcement.

Callisto brings technology and expertise that 73 Strings intends to fold into its existing platform. The stated goal is straightforward: broaden the reach of agentic AI — systems that can act autonomously on complex financial workflows rather than simply answer queries — across private capital operations.

Private markets remain stubbornly labor-intensive. Valuations, portfolio monitoring, due diligence and reporting still consume thousands of analyst hours each quarter across funds of every size. Software vendors such as 73 Strings have spent the past several years attacking those workflows with automation, and generative AI has accelerated the race.

Agentic AI represents the next stage of that push. Instead of drafting a single memo or summarizing a document, agentic systems chain together tasks: pulling data, running models, flagging exceptions and preparing outputs with limited human intervention. For private markets firms, that could compress reporting cycles that currently take weeks.

The acquisition of Callisto gives 73 Strings additional capacity on that front. The company positioned the deal explicitly around this capability — the word "agentic" leads its own description of the transaction.

The deal also signals where competition among private markets software providers is heading. Firms including 73 Strings are racing to embed AI agents deep into fund administration, valuation and investor reporting. Buyers with integrated AI stacks can lock in customers who want fewer vendors and faster cycles.

Financial terms of the transaction were not disclosed in the announcement. 73 Strings did not specify a closing date.

For 73 Strings, the immediate task is integration: combining Callisto's capabilities with its existing platform so that fund managers see a measurable reduction in manual work. How quickly that lands will determine whether the acquisition is a product enhancement or a genuine competitive leap in the private markets AI race.