Idinvest Partners, Entrepreneur Venture and BPI France have sold their stakes in Synthesio, a France-based social media monitoring and engagement company, to market research specialist Ipsos in a €50m transaction. Synthesio will be a standalone business unit at Ipsos, maintaining the name and brand. Loic Moisand and the Synthesio leadership team will continue to drive the company. Founded in 1975, Ipsos is a market research and opinion specialist. Headquartered in Paris, the group employs 16,000 employees and has a presence in 89 countries.

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