v3.26.1
Cover - USD ($)
 12 Months Ended
Jan. 31, 2026
Apr. 22, 2026
Jul. 31, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Current Fiscal Year End Date --01-31    
Document Period End Date Jan. 31, 2026    
Document Transition Report false    
Entity File Number 001-42987    
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 Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 0
Entity Common Stock, Shares Outstanding   149,574,024  
Documents Incorporated by Reference
Portions of the registrant’s definitive proxy statement for its 2026 Annual Meeting of Stockholders (“Proxy Statement”) to be filed within 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K, are incorporated by reference in Part III. Except with respect to information specifically incorporated by reference in this Annual Report, the Proxy Statement shall not be deemed to be filed as part hereof.
    
Document Fiscal Year Focus 2026    
Document Fiscal Period Focus FY    
Central Index Key 0001524566    
Amendment Flag false