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Five9 Exhibit 99.1 Five9 Reports Third Quarter Revenue Growth of 38 % to a Record $ 154.3 Million 51 % Growth in LTM Enterprise Subscription Revenue SAN RAMON , Calif . - November 8 , 2021 - Five9 , Inc. ( NASDAQ : FIVN ) , a leading provider of cloud contact center software , today reported results for the third quarter ended September 30 , 2021 . Third Quarter 2021 Financial Results • • • Revenue for the third quarter of 2021 increased 38 % to a record $ 154.3 million , compared to $ 112.1 million for the third quarter of 2020 . GAAP gross margin was 56.5 % for the third quarter of 2021 , compared to 58.5 % for the third quarter of 2020 . Adjusted gross margin was 64.1 % for the third quarter of 2021 , compared to 65.4 % for the third quarter of 2020 . GAAP net loss for the third quarter of 2021 was $ ( 20.5 ) million , or $ ( 0.30 ) per basic share , compared to GAAP net loss of $ ( 11.4 ) million , or $ ( 0.17 ) per basic share , for the third quarter of 2020 . Non - GAAP net income for the third quarter of 2021 was $ 20.0 million , or $ 0.28 per diluted share , compared to non - GAAP net income of $ 18.5 million , or $ 0.27 per diluted share , for the third quarter of 2020 . Adjusted EBITDA for the third quarter of 2021 was $ 27.4 million , or 17.8 % of revenue , compared to $ 24.1 million , or 21.5 % of revenue , for the third quarter of 2020 . GAAP operating cash flow for the third quarter of 2021 was $ ( 4.8 ) million , compared to GAAP operating cash flow of $ 22.8 million for the third quarter of 2020 . " We are pleased to report strong results for the third quarter . Revenue grew 38 % year - over - year to a record $ 154.3 million , which continues to be driven by our Enterprise business , as evidenced by LTM Enterprise subscription revenue which grew by 51 % year - over - year . Our performance for the quarter underscores the strength of our platform and the value we deliver to customers seeking to modernize and transform their contact centers . We have differentiated our platform by building a leadership position in AI - driven automation around customer experience and remain confident in the durability of 1