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Document and Entity Information
Sep. 24, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001842718
Document Type 8-K
Document Period End Date Sep. 24, 2025
Entity Registrant Name INTEGRAL AD SCIENCE HOLDING CORP.
Entity Incorporation State Country Code DE
Entity File Number 001-40557
Entity Tax Identification Number 83-0731995
Entity Address, Address Line One 12 E 49th Street
Entity Address, Address Line Two 20th Floor
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10017
City Area Code 646
Local Phone Number 278-4871
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common stock, par value $0.001
Trading Symbol IAS
Security Exchange Name NASDAQ
Entity Emerging Growth Company false