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Intangible Assets, Net
9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets, Net Intangible Assets, Net
The following tables present the detail of intangible assets, net as of the dates presented (in millions):
 September 30, 2025
 CostAccumulated AmortizationNet
Customer relationships$194 $(46)$148 
Software115 (46)69 
Developed technology
59 (28)31 
Trade names and trademarks47 (28)19 
Purchased content23 (17)
Total$438 $(165)$273 
 December 31, 2024
 CostAccumulated AmortizationNet
Customer relationships$94 $(29)$65 
Software
101 (39)62 
Developed technology
102 (51)51 
Trade names and trademarks47 (25)22 
Purchased content22 (15)
Total$366 $(159)$207 
On February 6, 2025, we entered into a partnership with Redfin Corporation (“Redfin”), making Zillow the exclusive provider of multifamily (properties with 25 or more units) rental listings on Redfin and its sites, including Rent.com and ApartmentGuide.com (together, “Redfin Rental Network”). Pursuant to this rentals partnership, Zillow made a $100 million payment to Redfin that is included in customer relationships in the table above and is being amortized over the estimated useful life of nine years. Zillow also pays Redfin for leads generated through the Redfin Rental Network for an initial period of five years with two optional two-year extensions, subject to the terms of the underlying agreements.
Amortization expense recorded for intangible assets was $22 million and $20 million for the three months ended September 30, 2025 and 2024, respectively, and $64 million and $58 million for the nine months ended September 30, 2025 and 2024, respectively. We did not record any impairment costs related to intangible assets for the three or nine months ended September 30, 2025 or 2024.
Estimated future amortization expense for intangible assets, including amortization related to future commitments (see Note 11), as of September 30, 2025 is as follows (in millions):
Remainder of 2025
$20 
202672 
202761 
202837 
2029
29 
Thereafter62 
Total future amortization expense$281