v3.25.2
Cover - shares
 6 Months Ended
Jun. 30, 2025
Jul. 31, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2025  
Document Transition Report false  
Entity File Number 001-39671  
Entity Registrant Name MediaAlpha, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 85-1854133  
Entity Address, Address Line One 700 South Flower Street  
Entity Address, Address Line Two Suite 640  
Entity Address, City or Town Los Angeles  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 90017  
City Area Code 213  
Local Phone Number 316-6256  
Title of 12(b) Security Class A Common Stock, $0.01 par value per share  
Trading Symbol MAX  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q2  
Entity Central Index Key 0001818383  
Current Fiscal Year End Date --12-31  
Class A Common    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   56,370,303
Class B Common    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   11,574,029