v3.26.1
Cover Page - shares
 3 Months Ended
Apr. 30, 2026
Jun. 11, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Apr. 30, 2026  
Document Transition Report false  
Entity File Number 001-42987  
Entity Registrant Name Wealthfront Corporation  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 20-8280144  
Entity Address, Address Line One 261 Hamilton Avenue  
Entity Address, City or Town Palo Alto,  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 94301  
City Area Code (844)  
Local Phone Number 995-8437  
Title of 12(b) Security Common stock, $0.0001 par value per share  
Trading Symbol WLTH  
Security Exchange Name NASDAQ  
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 Shell Company false  
Entity Common Stock, Shares Outstanding   149,361,216
Entity Central Index Key 0001524566  
Current Fiscal Year End Date --01-31  
Document Fiscal Year Focus 2027  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Ex Transition Period false