Cover - shares	9 Months Ended
	Sep. 30, 2023	Nov. 06, 2023
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2023
Document Transition Report	false
Entity File Number	001-39405
Entity Registrant Name	MarketWise, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	87-1767914
Entity Address, Address Line One	1125 N. Charles Street
Entity Address, City or Town	Baltimore
Entity Address, State or Province	MD
Entity Address, Postal Zip Code	21201
City Area Code	(888)
Local Phone Number	261-2693
Title of 12(b) Security	Class A common stock, $0.0001 par value per share
Trading Symbol	MKTW
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001805651
Current Fiscal Year End Date	--12-31
Common Stock - Class A
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		39,147,437
Common Stock - Class B
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		288,342,303