| Cover | Jan. 20, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 20, 2022 |
| Entity Registrant Name | DATTO HOLDING CORP. |
| Entity Central Index Key | 0001724570 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39637 |
| Entity Tax Identification Number | 81-3345706 |
| Entity Address, Address Line One | 101 Merritt 7 |
| Entity Address, City or Town | Norwalk |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06851 |
| City Area Code | 888 |
| Local Phone Number | 995-1431 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.001 par value |
| Trading Symbol | MSP |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
