Business and Summary of Significant Accounting Policies	6 Months Ended
Jan. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business and Summary of Significant Accounting Policies	Business and Summary of Significant Accounting Policies Description of the Business Zscaler, Inc. ("Zscaler," the "Company," "we," "us," or "our") is a cloud security company that developed a platform incorporating core security functionalities needed to enable fast and secure access to cloud resources based on identity, context and organization’s policies. Our solution is a purpose-built, multi-tenant, distributed cloud platform that incorporates the security functionality needed to enable users, applications, and devices to safely and efficiently utilize authorized applications and services based on an organization’s business policies. We deliver our solutions using a software-as-a-service ("SaaS") business model and sell subscriptions to customers to access our cloud platform, together with related support services. We were incorporated in Delaware in September 2007 and conduct business worldwide, with presence in North America, Europe and Asia. Our headquarters are in San Jose, California. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States ("GAAP") and applicable regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting, and include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the applicable required disclosures and regulations of the SEC. Therefore, these unaudited condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company's audited consolidated financial statements and related notes in its Annual Report on Form 10-K for the fiscal year ended July 31, 2022 (the "Fiscal 2022 Form 10-K"), as filed with the SEC on September 15, 2022. Interim Unaudited Condensed Consolidated Financial Statements The accompanying condensed consolidated balance sheet as of July 31, 2022 was derived from the audited consolidated financial statements as of that date. The accompanying interim condensed consolidated financial statements, including the condensed consolidated balance sheet as of January 31, 2023, the condensed consolidated statements of operations for the three and six months ended January 31, 2023 and 2022, the condensed consolidated statements of comprehensive loss for the three and six months ended January 31, 2023 and 2022, the condensed consolidated statements of stockholders’ equity for the three and six months ended January 31, 2023 and 2022 and the condensed consolidated statements of cash flows for the six months ended January 31, 2023 and 2022 are unaudited. The related financial data and the other financial information disclosed in the accompanying notes to these condensed consolidated financial statements are also unaudited. These interim unaudited condensed consolidated financial statements have been prepared on a basis consistent with our annual consolidated financial statements and, in our opinion, include all normal recurring adjustments necessary to state fairly our quarterly results. The results of operations for the three and six months ended January 31, 2023 are not necessarily indicative of the results to be expected for our fiscal year ending July 31, 2023 or for any other future fiscal year or interim period. Use of Estimates The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Such estimates include, but are not limited to, the determination of revenue recognition, deferred revenue, deferred contract acquisition costs, capitalized internal use software development costs, valuation of acquired intangible assets, period of benefit generated from our deferred contract acquisition costs, allowance for doubtful accounts, valuation of common stock options and stock-based awards, useful lives of property and equipment, useful lives of acquired intangible assets, recoverability of goodwill, valuation of deferred tax assets and liabilities, loss contingencies related to litigation, fair value and effective interest rate of convertible senior notes and the discount rate used for operating leases. Management determines these estimates and assumptions based on historical experience and on various other assumptions that are believed to be reasonable. Actual results could differ significantly from these estimates, and such differences may be material to the condensed consolidated financial statements. Due to uncertainty in the macroeconomic environment, including effects of COVID-19 and inflation, there is ongoing disruption in the global economy and financial markets. We are not aware of any specific event or circumstances that would require an update to our estimates, judgments or assumptions or a revision to the carrying value of our assets or liabilities as of the date of issuance of these condensed consolidated financial statements. These estimates, judgments and assumptions may change in the future, as new events occur or additional information is obtained. Fiscal Year Our fiscal year ends on July 31. References to fiscal 2023, for example, refer to our fiscal year ending July 31, 2023. Significant Accounting Policies Our significant accounting policies are described in the Fiscal 2022 Form 10-K. There have been no significant changes to these policies that have had a material impact on the condensed consolidated financial statements and related notes for the three and six months ended January 31, 2023 other than for the adoption of new accounting guidance related to convertible senior notes effective August 1, 2022, further described below. Recently Adopted Accounting Pronouncements In June 2020, the Financial Accounting Standard Board ("FASB") issued Accounting Standard Update ("ASU") No. 2020-06, Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40) ("ASU 2020-06"). This standard removes the separation model for convertible debt with a cash conversion feature and convertible instruments with a beneficial conversion feature. Such convertible debt will be accounted for as a single liability measured at its amortized cost, as long as no other features require bifurcation and recognition as derivatives. The update also requires the if-converted method to be used for convertible instruments and the effect of potential share settlement be included in the diluted earnings per share calculation when an instrument may be settled in cash or shares. We adopted this standard effective on August 1, 2022, the beginning of fiscal 2023, using the modified retrospective method. In accordance with the adoption of ASU 2020-06 and using the modified retrospective method, prior period amounts have not been adjusted. This standard resulted in our convertible senior notes being accounted for as a single unit of debt and we will no longer be required to record the conversion feature in equity. This further eliminated the need for amortization of the debt discount as interest expense and the portion of the issuance costs initially allocated to equity is now classified as debt and amortized as interest expense. As of August 1, 2022, the adoption of this new standard resulted in an increase of $169.9 million to the carrying amount of the convertible senior notes, a decrease of $273.7 million to additional paid-in capital and a cumulative-effect adjustment of $103.8 million to accumulated deficit. Prior to the adoption of this standard, we used the treasury stock method to calculate the potentially diluted effect of the convertible senior notes; however, upon adoption of this standard we are required to use the if-converted method. Accordingly, to account for the potentially diluted shares related to the senior convertible notes under a net income position, we are required to add back the interest expense to the net income and include approximately 7.63 million shares related to the senior convertible notes. Since we have reported net losses for all periods presented, the convertible senior notes were determined to be anti-dilutive and therefore had no impact to the diluted net loss per share for all periods presented.

Zscaler, Inc. ("Zscaler," the "Company," "we," "us," or "our") is a cloud security company that developed a platform incorporating core security functionalities needed to enable fast and secure access to cloud resources based on identity, context and organization’s policies. Our solution is a purpose-built, multi-tenant, distributed cloud platform that incorporates the security functionality needed to enable users, applications, and devices to safely and efficiently utilize authorized applications and services based on an organization’s business policies. We deliver our solutions using a software-as-a-service ("SaaS") business model and sell subscriptions to customers to access our cloud platform, together with related support services. We were incorporated in Delaware in September 2007 and conduct business worldwide, with presence in North America, Europe and Asia. Our headquarters are in San Jose, California.

The accompanying unaudited condensed consolidated financial statements have been prepared in conformity with accounting principles generally accepted in the United States ("GAAP") and applicable regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting, and include the accounts of the Company and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation.

Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the applicable required disclosures and regulations of the SEC. Therefore, these unaudited condensed consolidated financial statements and accompanying notes should be read in conjunction with the Company's audited consolidated financial statements and related notes in its Annual Report on Form 10-K for the fiscal year ended July 31, 2022 (the "Fiscal 2022 Form 10-K"), as filed with the SEC on September 15, 2022.

The accompanying condensed consolidated balance sheet as of July 31, 2022 was derived from the audited consolidated financial statements as of that date. The accompanying interim condensed consolidated financial statements, including the condensed consolidated balance sheet as of January 31, 2023, the condensed consolidated statements of operations for the three and six months ended January 31, 2023 and 2022, the condensed consolidated statements of comprehensive loss for the three and six months ended January 31, 2023 and 2022, the condensed consolidated statements of stockholders’ equity for the three and six months ended January 31, 2023 and 2022 and the condensed consolidated statements of cash flows for the six months ended January 31, 2023 and 2022 are unaudited. The related financial data and the other financial information disclosed in the accompanying notes to these condensed consolidated financial statements are also unaudited. These interim unaudited condensed consolidated financial statements have been prepared on a basis consistent with our annual consolidated financial statements and, in our opinion, include all normal recurring adjustments necessary to state fairly our quarterly results. The results of operations for the three and six months ended January 31, 2023 are not necessarily indicative of the results to be expected for our fiscal year ending July 31, 2023 or for any other future fiscal year or interim period.

The preparation of condensed consolidated financial statements in conformity with U.S. GAAP requires management to make estimates, judgments and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Such estimates include, but are not limited to, the determination of revenue recognition, deferred revenue, deferred contract acquisition costs, capitalized internal use software development costs, valuation of acquired intangible assets, period of benefit generated from our deferred contract acquisition costs, allowance for doubtful accounts, valuation of common stock options and stock-based awards, useful lives of property and equipment, useful lives of acquired intangible assets, recoverability of goodwill, valuation of deferred tax assets and liabilities, loss contingencies related to litigation, fair value and effective interest rate of convertible senior notes and the discount rate used for operating leases. Management determines these estimates and assumptions based on historical experience and on various other assumptions that are believed to be reasonable. Actual results could differ significantly from these estimates, and such differences may be material to the condensed consolidated financial statements.

Due to uncertainty in the macroeconomic environment, including effects of COVID-19 and inflation, there is ongoing disruption in the global economy and financial markets. We are not aware of any specific event or circumstances that would require an update to our estimates, judgments or assumptions or a revision to the carrying value of our assets or liabilities as of the date of issuance of these condensed consolidated financial statements. These estimates, judgments and assumptions may change in the future, as new events occur or additional information is obtained.

Our significant accounting policies are described in the Fiscal 2022 Form 10-K. There have been no significant changes to these policies that have had a material impact on the condensed consolidated financial statements and related notes for the three and six months ended January 31, 2023 other than for the adoption of new accounting guidance related to convertible senior notes effective August 1, 2022, further described below.

In June 2020, the Financial Accounting Standard Board ("FASB") issued Accounting Standard Update ("ASU") No. 2020-06, Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40) ("ASU 2020-06"). This standard removes the separation model for convertible debt with a cash conversion feature and convertible instruments with a beneficial conversion feature. Such convertible debt will be accounted for as a single liability measured at its amortized cost, as long as no other features require bifurcation and recognition as derivatives. The update also requires the if-converted method to be used for convertible instruments and the effect of potential share settlement be included in the diluted earnings per share calculation when an instrument may be settled in cash or shares. We adopted this standard effective on August 1, 2022, the beginning of fiscal 2023, using the modified retrospective method. In accordance with the adoption of ASU 2020-06 and using the modified retrospective method, prior period amounts have not been adjusted. This standard resulted in our convertible senior notes being accounted for as a single unit of debt and we will no longer be required to record the conversion feature in equity. This further eliminated the need for amortization of the debt discount as interest expense and the portion of the issuance costs initially allocated to equity is now classified as debt and amortized as interest expense. As of August 1, 2022, the adoption of this new standard resulted in an increase of $169.9 million to the carrying amount of the convertible senior notes, a decrease of $273.7 million to additional paid-in capital and a cumulative-effect adjustment of $103.8 million to accumulated deficit. Prior to the adoption of this standard, we used the treasury stock method to calculate the potentially diluted effect of the convertible