Investor Presentation Q1 2020

GAAP to Non-GAAP Reconciliation Three Months Ended September 30, 2015 Three Months Ended December 31, 2015 Three Months Ended March 31, 2016 Three Months Ended June 30, 2016 Three Months Ended September 30, 2016 Three Months Ended December 31, 2016 $ '000s % of Revenues $'000s % of Revenues % of $ '000s Revenues $ '000s % of Revenues $ '000s % of Revenues $ '000s % of Revenues Gross Margin Gross margin 35,233 74% 39,419 74% 44,989 76% 49,779 77% 54,777 78% 59,557 78% Stock-based compensation 404 1% 457 1% 418 1% 608 1% 577 1% 551 1% Amortization of acquired intangible assets 20 0% 20 0% 18 0% 13 0% 13 0% 13 0% Acquisition related expenses 0% 0% 0% 0% 0% 0% Non-GAAP gross margin 35,657 75% 39,896 75% 45,425 77% 50,400 78% 55,367 78% 60,121 79% Loss from Operations Loss from operations (13,290) -28% (10,449) -20% (9,861) -17% (11,030) -17% (9,951) -14% (13,820) -18% Stock-based compensation 4,510 9% 6,015 11% 6,231 11% 8,475 13% 8,695 12% 9,274 12% Amortization of acquired intangible assets 26 0% 26 0% 24 0% 20 0% 20 0% 20 0% Acquisition related expenses 0% 0% 0% 0% 0% 0% Non-GAAP loss from operations (8,754) -18% (4,408) -8% (3,606) -6% (2,535) -4% (1,236) -2% (4,526) -6% Three Months Ended March 31, 2017 Three Months Ended June 30, 2017 $ '000s % of Revenues $ '000s % of Revenues $ '000s Three Months Ended September 30, 2017 % of Revenues Three Months Ended December 31, 2017 Three Months Ended March 31, 2018 Three Months Ended June 30,2018 $'000s % of Revenues $ '000s % of Revenues $ '000s % of Revenues Gross Margin Gross margin 65,180 79% 70,502 79% 78,716 81% 85,485 80% 92,179 80% 97,725 80% Stock-based compensation 564 1% 844 1% 754 1% 823 1% 967 1% 1,163 1% Amortization of acquired intangible assets 9 0% 0% 38 0% 50 0% 50 0% 50 0% Acquisition related expenses 0% 0% 0% 0% 0% 0% Non-GAAP gross margin 65,753 80% 71,346 80% 79,508 81% 86,358 81% 93,196 81% 98,938 81% Loss from Operations Loss from operations (8,000) -10% (10,577) -12% (12,126) -12% (9,433) -9% (11,324) -10% (14,052) -11% Stock-based compensation 9,303 11% 13,006 15% 12,110 12% 12,898 12% 16,046 14% 19,675 16% Amortization of acquired intangible assets 16 0% 0% 38 0% 50 0% 50 0% 50 0% Acquisition related expenses 0% 0% 439 0% 827 1% 802 1% 802 1% Non-GAAP loss from operations 1,319 2% 2,429 3% 461 0% 4,342 4% 5,574 5% 6,475 5% . . 28

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