Page 1

zix Exhibit 99.1 Press Release | For Distribution Zix Reports Second Quarter 2021 Financial Results Strong Adoption of Secure Cloud Platform Drives 18 % Increase in Revenue and 17 % Increase in Annual recurring revenue ( ARR ) Generated $ 14.7 Million in Cash Flow from Operations , an increase of 212 % Compared to Q2 2020 Cash Position Increased $ 10.2 Million or 43 % to $ 33.9 Million Compared to Q1 2021 Second Quarter 2021 Financial Highlights ( results compared to the same year - ago quarter ) Revenue increased 18 % to $ 62.8 million . DALLAS - August 5 , 2021 - Zix Corporation ( Zix ) ( NASDAQ : ZIXI ) , a leading provider of cloud email security , productivity , and compliance solutions , today announced financial results for the second quarter ended June 30 , 2021 . Annual recurring revenue ( ARR ) increased 17 % to $ 252.4 million . Cloud ARR increased 24 % to $ 225.6 million or 89 % of total ARR . GAAP net loss totaled ( $ 2.9 ) million compared to a year ago net loss of ( $ 1.9 ) million . GAAP net loss attributable to common stockholders totaled ( $ 5.3 ) million compared to a year ago net loss attributable to common stockholders of ( $ 4.1 ) million . The company's Q2 2021 net loss attributable to common shareholders includes the effect of a deemed dividend to preferred shareholders of $ 2.4 million and acquisition - related expenses of $ 0.1 million . GAAP fully diluted earnings ( loss ) per share attributable to common stockholders totaled ( $ 0.10 ) compared to ( $ 0.08 ) . Non - GAAP adjusted net income before deemed dividends and excluding deferred tax ( benefit ) expense totaled $ 7.9 million compared to $ 8.0 million . Non - GAAP adjusted net income per share before deemed dividends and excluding deferred tax ( benefit ) expense totaled $ 0.14 . Adjusted EBITDA increased 5 % to $ 13.3 million , representing an adjusted EBITDA margin of 21.1 % . The company ended the quarter with $ 33.9 million in cash , an increase of 43 % or $ 10.2 million compared to the end of the prior quarter . Cash flow from operations was $ 14.7 million , an increase of 212 % or $ 10.0 million compared to the prior year period . www.zixcorp.com 1