| Document and Entity Information | Feb. 23, 2022 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001851003 |
| Document Type | 8-K |
| Document Period End Date | Feb. 23, 2022 |
| Entity Registrant Name | ZETA GLOBAL HOLDINGS CORP. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-40464 |
| Entity Tax Identification Number | 80-0814458 |
| Entity Address, Address Line One | 3 Park Ave |
| Entity Address, Address Line Two | 33rd Floor |
| Entity Address, City or Town | New York |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10016 |
| City Area Code | (212) |
| Local Phone Number | 967-5055 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Class A common stock, $0.001 par value per share |
| Trading Symbol | ZETA |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
