Cover - shares	9 Months Ended
	Sep. 30, 2021	Nov. 01, 2021
Entity Listings [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2021
Document Transition Report	false
Entity File Number	001-39243
Entity Registrant Name	SKILLZ INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	84-4478274
Entity Address, Address Line One	PO Box 445
Entity Address, City or Town	San Francisco
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94104
City Area Code	415
Local Phone Number	762-0511
Title of 12(b) Security	Class A common stock, par value $0.0001 per share
Trading Symbol	SKLZ
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Amendment Flag	false
Entity Central Index Key	0001801661
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Class A common stock, par value $0.0001 per share
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		339,335,182
Class B Common Stock
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		68,717,138