Google's search dominance remains formidable at 90.04% global market share but is experiencing the most significant erosion in a decade (down 1.43pp YoY). The competitive landscape has bifurcated into traditional search (Bing at 4.31%, gaining steadily) and AI-native search (ChatGPT at 12% of Google's query volume, Perplexity at 45M MAUs).
Mobile remains a near-monopoly at 92-95%, insulating the core revenue engine. Google's defensive strategy centers on Gemini, which grew from 14.7% to 25.2% of the AI chatbot market in one year. The critical assessment: AI competitors are currently complementary (95% of ChatGPT users still use Google) rather than substitutive, and their combined revenue ($150M Perplexity + estimated $1-2B ChatGPT) is <1% of Google Search revenue. However, the trajectory matters more than the current level.
Key open question
At what level of AI search penetration does Google's monopoly pricing power begin to erode?
At what level of AI search penetration does Google's monopoly pricing power begin to erode?
AI-native search competitors represent the most credible long-term threat to Google's search monopoly, but remain orders of magnitude smaller in scale. ChatGPT has 12% of Google's search volume but sends 190x less traffic to websites, with 95% of ChatGPT users still also using Google.
Perplexity AI has ~45M MAUs and $150M ARR -- 0.07% of Google Search's $224B revenue. Google's own Gemini chatbot has been gaining share rapidly (14.7% to 25.2% of chatbot market in one year) while ChatGPT's share fell from 69.1% to 45.3%. The competitive dynamic suggests AI chatbots are currently complementary to search rather than substitutive, but the long-term trajectory toward conversational search could gradually erode traditional search if these platforms develop better monetization and broader use cases.
Google's global search market share declined from 91.47% to 90.04% over the past year -- the most significant annual drop in a decade -- but remains overwhelmingly dominant, especially on mobile (92-95%). The erosion is concentrated in the US market, where share dropped from 88% to 84.17%, and on desktop (82.38%).
Mobile search, which drives the majority of queries, maintains near-monopoly status through Android pre-installation and iOS default placement. Bing is the primary beneficiary, gaining 4 consecutive years of share growth to reach 4.31% globally (10.48% US). The competitive dynamics are bifurcated: traditional search is a mature oligopoly with Google dominant, while AI-native search (ChatGPT, Perplexity) represents a nascent adjacent market that has not yet meaningfully dented Google's core share metrics.