| Document and Entity Information | Sep. 30, 2022 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001823575 |
| Document Type | 8-K |
| Document Period End Date | Sep. 30, 2022 |
| Entity Registrant Name | ZEROFOX HOLDINGS, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-39722 |
| Entity Tax Identification Number | 98-1557361 |
| Entity Address, Address Line One | 1834 S. Charles Street |
| Entity Address, City or Town | Baltimore |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 21230 |
| City Area Code | (855) |
| Local Phone Number | 936-9369 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Common Stock 0.0001 Par Value Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common Stock, $0.0001 par value per share |
| Trading Symbol | ZFOX |
| Security Exchange Name | NASDAQ |
| Warrants Each Whole Warrant Exercisable For One Share Of Common Stock At An Exercise Price Of 11.50 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants, each whole warrant exercisable for one share of Common Stock at an exercise price of $11.50 per share |
| Trading Symbol | ZFOXW |
| Security Exchange Name | NASDAQ |
