The MMC funding came through the MMC London Fund, which is overseen by Mayor of London Boris Johnson and is intended to support the growth of London-based businesses.
Somo, which was launched in 2009, has clients including De Beers, British Gas and Tesco.
MMC partner Rory Stirling said, “Somo is growing at a phenomenal rate.
“We are consistently impressed by the performance of the team, and the business as a whole.
“The MMC London Fund is all about identifying the fast growth London businesses that can go all the way given a little support, and we are very pleased to be continuing to support Somo as they progress.”
MMC won the competitive tender to launch the £11m fund targeting early-stage business in London last April.
The MMC London Fund, which is partly financed by a grant from the European Regional Development Fund, could see £22m invested in the capital thanks to matched funding.
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