Big tech Q3 2026 ad revenue: Meta charges more as Google and Amazon slow

The biggest sellers of advertising have now reported their July to September numbers, and the picture is uneven. Meta grew ad revenue 26% by charging more per ad, growth cooled at Google and slowed sharply at Amazon, and Microsoft’s search business picked up. All four are spending heavily on AI, and investors are now watching cash flow as closely as revenue.

The quarter, platform by platform

Google’s advertising revenue rose 10.6% in the quarter to 30 September, as Marketing Dive reported. Search grew 12% to $63.4bn and YouTube ads 9%, both slower than the 15% each managed a year earlier, taking total Google ad revenue to $82.0bn, according to The Desk. Search missed analyst estimates for the second quarter running, and Alphabet shares fell after the results on 28 October.

Meta, which reported on 21 October, took $63.1bn in advertising, up 26%. Ad impressions rose 10% but the average price per ad rose 14%, so more of the growth came from charging more than from showing more ads.

This week Meta added more detail on why. It said improvements to its ad ranking system drove 8.3% more ad clicks and 15.7% more conversions on Facebook in the second quarter, and that partnership ads with creators have passed a $15bn annual revenue run rate, as Marketing Dive’s Sociable column reported.

Amazon’s ad revenue rose 11% to $19.6bn, or 12% excluding currency, down from 26% growth in the previous quarter. Amazon put the slowdown down to timing anomalies mainly linked to Prime Day, and expects ad growth to return to the high teens in the fourth quarter, which includes its October Prime Big Deal Days. It also says outside AI agents such as ChatGPT, Gemini and Meta’s Muse are not hurting its ad business, as Adweek reported.

Microsoft’s search and advertising revenue, excluding traffic acquisition costs, grew 12% in its fiscal first quarter, within total revenue of $92.3bn. Its results release did not give a separate figure for LinkedIn.

The AI bill

Alphabet spent $51.4bn on capital expenditure in the quarter and had negative free cash flow of $9.1bn. Meta’s free cash flow was also negative, at minus $2.1bn, while Microsoft generated $18.6bn, which Adweek argued is now the metric investors care about.

AI is also changing how search makes money. Google is expanding ads in AI Mode internationally and bringing a format that appears in follow-up queries to the US. But chief business officer Philipp Schindler admitted that the fast growth in AI Mode queries weighed on revenue, because AI Mode currently monetises less well than classic search.

Why it matters

Search, social and retail media already take around two thirds of global ad spend, according to WARC’s forecast, so these results set the price of most UK digital budgets. Meta’s 14% rise in price per ad is the figure UK advertisers will feel first. Meta says better ranking justifies it, but brands should test that against their own conversion data, especially after the row over its AI ad enhancements.

Google’s numbers are the bigger long-term signal: if searches keep moving into AI Mode before the ads there pay as well, expect Google to push new formats and more automated buying onto advertisers. Amazon, meanwhile, insists AI shopping agents are not eating its retail media business, and its fourth quarter will show whether this quarter’s slowdown really was just timing.