v3.26.1
Document and Entity Information - shares
 6 Months Ended
Jun. 30, 2026
Aug. 04, 2026
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Jun. 30, 2026  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Entity Registrant Name Commerce.com, Inc.  
Entity Central Index Key 0001626450  
Entity Current Reporting Status Yes  
Entity Filer Category Accelerated Filer  
Entity Shell Company false  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity File Number 001-39423  
Entity Tax Identification Number 46-2707656  
Entity Address, Address Line One 11920 Alterra Parkway  
Entity Address, Address Line Two D11 / Suite 100  
Entity Address, Address Line Three 8th Floor  
Entity Address City Or Town Austin  
Entity Address State Or Province TX  
Entity Interactive Data Current Yes  
Entity Address Postal Zip Code 78758  
City Area Code 512  
Local Phone Number 865-4500  
Entity Incorporation State Country Code DE  
Entity Common Stock, Shares Outstanding   82,858,991
Series 1 Common Stock, $0.0001 Par Value Per Share    
Document Information [Line Items]    
Security12b Title Series 1 common stock, $0.0001 par value per share  
Trading Symbol CMRC  
Security Exchange Name NASDAQ  
Series A Junior Participating Preferred Stock, Par Value $0.0001 Per Share    
Document Information [Line Items]    
Security12b Title Series A Junior Participating Preferred Stock, par value $0.0001 per share  
No Trading Symbol Flag true  
Security Exchange Name NASDAQ