Callisto

Based in France, Callisto, operates as a platform providing artificial intelligence-based solutions for private market transactions and tasks. Based in France and founded in 2024, Callisto provides an online platform that leverages artificial intelligence for private market transactions. In September 2026, Callisto was acquired by 73 Strings SAS, a portfolio company of Goldman Sachs Asset Management and others, to enhance its valuation and portfolio-intelligence platform with advanced AI technology. Callisto's primary offerings focus on enhancing the efficiency of due diligence processes for private market professionals.

The platform employs advanced AI technology to audit data rooms quickly, automate responses to due diligence questionnaires (DDQs) with high accuracy, and generate investment memorandums tailored to align with a firm's specific communication style. These services are designed to alleviate the administrative burden on analysts, allowing them to concentrate on high-value tasks such as uncovering investment opportunities. Callisto's client base includes leading investment firms and financial institutions, primarily operating within the European market, where compliance with stringent regulatory standards like GDPR is paramount. The platform's autonomous agents integrate historical data, RFPs, and compliance documents, resulting in streamlined processes that can substantially reduce the time spent on preliminary diligence activities.

Callisto generates revenue through subscription-based models aimed at investment firms seeking to optimize their operational workflows. Client transactions typically occur via annual contracts that provide access to the platform and its suite of automation tools. These services include features such as intelligent response orchestration, data room auditing, and automated investment documentation. Subscribers benefit from premium service levels that may encompass on-premise options or private cloud deployments, ensuring maximum data security and compliance with European regulations.

The scalable nature of Callisto's offerings allows firms to select packages that cater to their specific diligence needs while potentially enhancing overall deal velocity and operational efficiency. The company plans to continue enhancing its platform capabilities by integrating more advanced AI technologies to streamline private equity workflows. Current initiatives include expanding its service offerings to better meet the needs of investment firms and ensuring compliance with evolving regulatory standards.