Summary of Significant Accounting Policies (Policies)	9 Months Ended
Oct. 31, 2019
Accounting Policies [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company's Annual Report on Form 10-K for the fiscal year ended January 31, 2019, filed with the SEC on March 15, 2019 (the "Form 10-K"). The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation. The condensed consolidated balance sheet as of January 31, 2019, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis. In the opinion of management, the accompanying condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods. The results for the three and nine months ended October 31, 2019 are not necessarily indicative of the results to be expected for any subsequent quarter, the fiscal year ending January 31, 2020, or any other period.
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of those financial statements and the reported amounts of revenue and expense during the reporting period. These estimates include, but are not limited to, the standalone selling prices ("SSP") of performance obligations, the incremental borrowing rate associated with lease liabilities, the useful life of capitalized costs to obtain customer contracts, income taxes, and the fair value of stock-based compensation. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions that it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the financial position and results of operations.
Segment Information	Segment Information The Company is the provider of the Yext platform and operates as one operating segment. An operating segment is defined as a component of an enterprise for which separate financial information is evaluated regularly by the chief operating decision makers ("CODM"). The Company defines its CODM as its executive officers, and their role is to make decisions about allocating resources and assessing performance. The Company's business operates in one operating segment as all of the Company's offerings operate on the Yext platform and are deployed in an identical way, with its CODM evaluating the Company's financial information, resources and performance of these resources on a consolidated basis. Since the Company operates in one operating segment, all required financial segment information can be found in the condensed consolidated financial statements.
Concentration of Credit Risk	Concentration of Credit Risk Certain financial instruments that could be exposed to a concentration of credit risk may include cash and cash equivalents, marketable securities and accounts receivable. The Company deposits its cash with financial institutions, and such deposits, at times, may exceed federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents to date. Collateral is not required for accounts receivable.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Adoption of New Accounting Standard - ASU 2016-02 In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, "Leases" ("ASU 2016-02"), which introduced and codified new lease accounting guidance under ASC 842. This standard requires lessees to record a lease liability, initially measured at the present value of future lease payments, and a right-of-use asset, associated with operating leases, on its balance sheet. The standard also requires a single lease expense to be recognized within the statement of operations on a straight-line basis over the lease term. The Company adopted the new standard on February 1, 2019, which resulted in the Company recording lease liabilities and right-of-use assets associated with its operating leases on its balance sheet, and did not have a material effect on the statement of operations and comprehensive loss. The Company utilized the modified retrospective adoption approach, whereby all prior periods continue to be reported under previous lease accounting guidance. The Company elected the package of practical expedients to not reassess prior conclusions related to lease identification, classification and initial direct costs, and did not elect the hindsight practical expedient which would have permitted the use of hindsight in determining the lease term and assessing impairment. See Note 13 "Leases" for further discussion on the Company's accounting for leases under ASC 842. Adoption of New Accounting Standard - ASU 2018-07 The Company prospectively adopted ASU 2018-07, "Compensation - Stock Compensation (Topic 718): Improvements to Non-employee Share-Based Payment Accounting" on February 1, 2019. The Company will not apply a forfeiture rate assumption to value stock-based awards issued to non-employees, given the nature of the services provided. The adoption of this standard did not have a material effect on the Company's condensed consolidated financial statements. Adoption of New Accounting Standard - ASU 2018-15 The Company prospectively adopted ASU 2018-15, "Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract" on February 1, 2019. As a result, eligible implementation costs capitalized in a cloud computing arrangement are included in the Prepaid expenses and other current assets on the balance sheet. Such costs are recognized on a straight-line basis over the estimated useful life in the statement of operations and comprehensive loss in the same line item as the fees for the associated arrangement, and the related activity is generally classified as an operating activity in the statement of cash flows. The adoption of this standard did not have a material effect on the Company's condensed consolidated financial statements as of and for the three and nine months ended October 31, 2019.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Oct. 31, 2019

The accompanying condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America ("GAAP") and applicable rules and regulations of the Securities and Exchange Commission ("SEC") regarding interim financial reporting. Certain information and note disclosures normally included in the financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to such rules and regulations. Therefore, these condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and notes included in the Company's Annual Report on Form 10-K for the fiscal year ended January 31, 2019, filed with the SEC on March 15, 2019 (the "Form 10-K"). The condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been eliminated in consolidation.

The condensed consolidated balance sheet as of January 31, 2019, included herein, was derived from the audited financial statements as of that date, but does not include all disclosures including certain notes required by GAAP on an annual reporting basis.

In the opinion of management, the accompanying condensed consolidated financial statements reflect all normal recurring adjustments necessary to present fairly the financial position, results of operations, comprehensive loss and cash flows for the interim periods. The results for the three and nine months ended October 31, 2019 are not necessarily indicative of the results to be expected for any subsequent quarter, the fiscal year ending January 31, 2020, or any other period.

Use of Estimates

The preparation of condensed consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of those financial statements and the reported amounts of revenue and expense during the reporting period. These estimates include, but are not limited to, the standalone selling prices ("SSP") of performance obligations, the incremental borrowing rate associated with lease liabilities, the useful life of capitalized costs to obtain customer contracts, income taxes, and the fair value of stock-based compensation. Management bases its estimates on historical experience and on various other market-specific and relevant assumptions that it believes to be reasonable under the circumstances. Actual results could differ from those estimates and such differences could be material to the financial position and results of operations.

Segment Information

The Company is the provider of the Yext platform and operates as one operating segment. An operating segment is defined as a component of an enterprise for which separate financial information is evaluated regularly by the chief operating decision makers ("CODM"). The Company defines its CODM as its executive officers, and their role is to make decisions about allocating resources and assessing performance. The Company's business operates in one operating segment as all of the Company's offerings operate on the Yext platform and are deployed in an identical way, with its CODM evaluating the Company's financial information, resources and performance of these resources on a consolidated basis. Since the Company operates in one operating segment, all required financial segment information can be found in the condensed consolidated financial statements.

Concentration of Credit Risk

Certain financial instruments that could be exposed to a concentration of credit risk may include cash and cash equivalents, marketable securities and accounts receivable. The Company deposits its cash with financial institutions, and such deposits, at times, may exceed federally insured limits. The Company has not experienced any losses on its deposits of cash and cash equivalents to date. Collateral is not required for accounts receivable.

Recent Accounting Pronouncements

Adoption of New Accounting Standard - ASU 2016-02

In February 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") No. 2016-02, "Leases" ("ASU 2016-02"), which introduced and codified new lease accounting guidance under ASC 842. This standard requires lessees to record a lease liability, initially measured at the present value of future lease payments, and a right-of-use asset, associated with operating leases, on its balance sheet. The standard also requires a single lease expense to be recognized within the statement of operations on a straight-line basis over the lease term.

The Company adopted the new standard on February 1, 2019, which resulted in the Company recording lease liabilities and right-of-use assets associated with its operating leases on its balance sheet, and did not have a material effect on the statement of operations and comprehensive loss. The Company utilized the modified retrospective adoption approach, whereby all prior periods continue to be reported under previous lease accounting guidance. The Company elected the package of practical expedients to not reassess prior conclusions related to lease identification, classification and initial direct costs, and did not elect the hindsight practical expedient which would have permitted the use of hindsight in determining the lease term and assessing impairment. See Note 13 "Leases" for further discussion on the Company's accounting for leases under ASC 842.

Adoption of New Accounting Standard - ASU 2018-07

The Company prospectively adopted ASU 2018-07, "Compensation - Stock Compensation (Topic 718): Improvements to Non-employee Share-Based Payment Accounting" on February 1, 2019. The Company will not apply a forfeiture rate assumption to value stock-based awards issued to non-employees, given the nature of the services provided. The adoption of this standard did not have a material effect on the Company's condensed consolidated financial statements.

Adoption of New Accounting Standard - ASU 2018-15

The Company prospectively adopted ASU 2018-15, "Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract" on February 1, 2019. As a result, eligible implementation costs capitalized in a cloud computing arrangement are included in the Prepaid expenses and other current assets on the balance sheet. Such costs are recognized on a straight-line basis over the estimated useful life in the statement of operations and comprehensive loss in the same line item as the fees for the associated arrangement, and the related activity is generally classified as an operating activity in the statement of cash flows. The adoption of this standard did not have a material effect on the Company's condensed consolidated financial statements as of and for the three and nine months ended October 31, 2019.