Amortization expense for intangible assets was $1.8 million and $0.3 million for the years ended December 31, 2021 and 2020, respectively. Amortization related to intangible assets for acquired technology was included in cost of revenues and amortization related to intangible assets for customer relationships was included in sales and marketing expenses in the Company’s consolidated statement of operations and comprehensive loss for the periods presented.

Future amortization that will be charged to expense over the remaining life of the intangible assets as of December 31, 2021 is as follows: