Sinch Mergers and Acquisitions Presentation Deck

Financial leverage 11 -8.8 -9.6 Pro forma net debt/Adjusted EBITDA Q2 21 reported -0.5 2.6 2.7 0.5 Q2 21 + Inteliquent + Message + Messenger + $750m pro forma People share issue Media The acquisitions of Inteliquent, MessageMedia, and Pathwire are pending regulatory approval. 2.7 + Pathwire ● Pro forma calculation includes last 12 months of Adj EBITDA for acquired entities ● • Updated financial target is to maintain Net debt < 3.5x adjusted EBITDA over time ● Pro forma Net debt/Adj EBITDA of 2.7x after payment for Inteliquent, MessageMedia, MessengerPeople and Pathwire 21

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