73 Strings Acquires Callisto
Wednesday, September 30, 2026 · first reported by Private Equity Professional
73 Strings, a valuation and portfolio-monitoring platform for alternative asset managers, acquired Callisto, a Paris-based AI due diligence tool for PE/credit firms. Callisto co-founders join 73 Strings as co-heads of AI product; 73 Strings raised $55M Series B in Feb 2025 from Goldman Sachs Alternatives, Blackstone Innovations, Golub Capital, and Hamilton Lane.
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- North America
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