X0206 3 2020-10-20 0 0001724570 DATTO HOLDING CORP. MSP 0001276254 ABBOT JOHN 101 MERRITT 7 NORWALK CT 06851 0 1 0 0 Chief Financial Officer Options (Right to Buy) 12.80 2030-06-29 Common Stock 700000 D These options vest 25% on March 2, 2021 and quarterly thereafter at a rate of 6.25% as long as such individual continues to be employed as of each respective vest date. Exhibit 24 - Power of Attorney /s/ Adam Collicelli, by Power of Attorney 2020-10-20