v3.24.3
Document and Entity Information
 9 Months Ended
Sep. 30, 2024
shares
Document and Entity Information [Abstract]  
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Sep. 30, 2024
Document Transition Report false
Entity File Number 001-42125
Entity Registrant Name Waystar Holding Corp.
Entity Incorporation, State or Country Code DE
Entity Tax Identification Number 84-2886542
Entity Address, Address Line One 1550 Digital Drive, #300
Entity Address, City or Town Lehi
Entity Address, State or Province UT
Entity Address, Postal Zip Code 84043
City Area Code 844
Local Phone Number 492-9782
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol WAY
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 Ex Transition Period false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 172,086,129
Entity Central Index Key 0001990354
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2024
Document Fiscal Period Focus Q3
Amendment Flag false