v3.26.1
DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
 3 Months Ended 12 Months Ended
Oct. 31, 2025
USD ($)
shares
Oct. 30, 2025
shares
Sep. 18, 2025
shares
Jan. 31, 2025
USD ($)
shares
Jan. 31, 2026
USD ($)
segment
$ / shares
shares
Jan. 31, 2025
USD ($)
shares
Jan. 31, 2024
USD ($)
Class of Stock [Line Items]              
Common stock, capital shares reserved for future issuance (in shares)   2,070,000,000   197,511,756 86,406,527 197,511,756  
Preferred stock, capital shares reserved for future issuance (in shares)         20,000,000    
Stock issued during period, shares, conversion of convertible securities (in shares) 146,599,125            
Share-based payment arrangement, accelerated cost | $ $ 81,800,000       $ 101,800,000    
Capitalized stock-based compensation | $ $ 900,000       4,933,000 $ 2,319,000 $ 1,130,000
Share-based payment arrangement, shares withheld for tax withholding obligation (in shares) 709,106            
Share-based compensation arrangement by share-based payment award, shares issued in period (in shares) 934,353            
Payment of tax withholdings on settlement of RSUs | $         17,728,000 0 0
Reverse stock splits (in shares)     1        
Deferred offering costs | $       $ 0 9,300,000 0  
Advertising expense | $         $ 35,000,000.0 $ 22,300,000 $ 12,400,000
Requisite service period (in years)         4 years    
RSU service period (in years)         4 years    
Number of operating segments | segment         1    
Number of reportable segments | segment         1    
Stockholders' equity note, stock split, conversion ratio     0.333        
Stock options issued and outstanding              
Class of Stock [Line Items]              
Common stock, capital shares reserved for future issuance (in shares)       40,971,097 39,283,485 40,971,097  
Award expiration period (in years)         10 years    
Employee Stock              
Class of Stock [Line Items]              
Share-based compensation arrangement by share-based payment award, shares issued in period (in shares)         0    
Award expiration period (in years)         12 months    
Purchase periods | segment         2    
Purchase period         6 months    
Discount from market price, purchase date         15.00%    
One Payment Partner | Revenue Benchmark | Customer Concentration Risk              
Class of Stock [Line Items]              
Concentration risk, percentage       11.00%     12.00%
One Platform Customer | Accounts Receivable | Customer Concentration Risk              
Class of Stock [Line Items]              
Concentration risk, percentage           12.00%  
Common Stock              
Class of Stock [Line Items]              
Stock issued during period, shares, conversion of convertible securities (in shares) [1]         1,742,352    
Class A common stock              
Class of Stock [Line Items]              
Common stock, capital shares reserved for future issuance (in shares)         2,000,000,000    
Stock issued during period, shares, conversion of convertible securities (in shares)   146,599,125          
Class A common stock | Common Stock              
Class of Stock [Line Items]              
Conversion of Class A to Class B common stock (in shares)         15,304,696    
Common Class A and B              
Class of Stock [Line Items]              
Common stock, capital shares reserved for future issuance (in shares)         2,050,000,000    
Class B common stock              
Class of Stock [Line Items]              
Common stock, capital shares reserved for future issuance (in shares)         50,000,000    
IPO              
Class of Stock [Line Items]              
Sale of stock, number of shares issued in transaction (in shares) 30,000,000            
Sale of stock, price per share (in dollars per share) | $ / shares         $ 25.00    
Sale of stock, consideration received on transaction | $ $ 713,300,000            
IPO | Class A common stock              
Class of Stock [Line Items]              
Sale of stock, number of shares issued in transaction (in shares) 6,924,406            
Sale of stock, price per share (in dollars per share) | $ / shares         $ 25.00    
Over-Allotment Option              
Class of Stock [Line Items]              
Common stock, capital shares reserved for future issuance (in shares)         5,538,660    
[1] The share amounts listed above combine common stock, Class A common stock and Class B common stock. In connection with the completion of our initial public offering, all previously outstanding shares of common stock were reclassified into Class A common stock and Class B common stock. Refer to Note 1 for more information.