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ON24 ON24 Announces Second Quarter 2021 Financial Results • Second quarter total revenue grows 43 % year - over - year to $ 52.1 million Exhibit 99.1 Subscription and other platform revenue , excluding legacy , grows 68 % year - over - year to $ 44.4 million SAN FRANCISCO— ( BUSINESS WIRE ) -ON24 ( NYSE : ONTF ) , a leading cloud - based digital experience platform provider , today announced financial results for its second quarter ended June 30 , 2021 . " Total revenue in the second quarter of 2021 grew 43 % year - over - year , and our subscription and other platform revenue , excluding legacy , grew 68 % year- over - year , " said Sharat Sharan , co - founder and CEO of ON24 . " The second quarter of 2021 was a transition quarter where we went from a ' peak of Covid ' in Q2 2020 to a ' peak of vaccinations ' in Q2 2021 and we exited this quarter with a significantly improved quality of our customer base . The last year has accelerated the global enterprise awareness of our offerings and we are now serving a larger market than ever before . As our category leadership grows , our future is more exciting than ever before . " Second Quarter 2021 Financial Highlights • Revenue : Total revenue was $ 52.1 million , an increase of 43 % year - over - year , or 47 % year - over - year , excluding legacy . Subscription and Other Platform Revenue : Subscription and Other Platform Revenue , excluding legacy , was $ 44.4 million , an increase of 68 % year - over - year . ARR : ARR increased 44 % year - over - year to $ 164.1 million as of June 30 , 2021 . Net Loss Attributable to Common Stockholders : Net loss attributable to common stockholders was $ 2.5 million , or $ ( 0.05 ) per diluted share , compared to net income attributable to common stockholders of $ 5.3 million , or $ 0.14 per diluted share in the second quarter of 2020 .