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Document and Entity Information
Feb. 14, 2025
Cover [Abstract]  
Amendment Flag false
Entity Central Index Key 0001647639
Document Type 8-K
Document Period End Date Feb. 14, 2025
Entity Registrant Name Upstart Holdings, Inc.
Entity Incorporation State Country Code DE
Entity File Number 001-39797
Entity Tax Identification Number 46-4332431
Entity Address, Address Line One 2950 S. Delaware Street
Entity Address, Address Line Two Suite 410
Entity Address, City or Town San Mateo
Entity Address, State or Province CA
Entity Address, Postal Zip Code 94403
City Area Code (833)
Local Phone Number 212-2461
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, par value $0.0001 per share
Trading Symbol UPST
Security Exchange Name NASDAQ
Entity Emerging Growth Company false