Observed Signal · Dec 5, 2025 · Research Report · Source: Trending Topics · Impact: 4/5 · Sentiment: Neutral
ChatGPT Now Bigger Than WhatsApp, Wikipedia, Amazon: Similarweb
A new Similarweb 'Generative AI Landscape Report 2025' reveals that ChatGPT has become the fifth largest website globally, surpassing Wikipedia, WhatsApp, Amazon, and X. GenAI app downloads surged 319% year-over-year, with average monthly visits to GenAI sites up 76%. The study shows that 95% of ChatGPT users still rely on Google, indicating complementary, not substitutive, search behavior. GenAI referrals to transactional sites now convert at approximately 7%, with over 1.1 billion referral visits in June 2025, a 357% increase. However, referral traffic has plateaued since mid-2025 as users spend more time within AI platforms. News-related queries on ChatGPT rose 212% over 18 months, while organic traffic to news sites dropped 26% since Google's AI Overviews launch. ChatGPT dominates with nearly 78% of global AI traffic, while Gemini gains ground. The report emphasizes the rise of Generative Engine Optimization (GEO) for brand visibility.
Provides critical data on GenAI's shift of user behavior away from traditional search, affecting publisher traffic, referral conversions, and requiring brands to adopt GEO strategies.
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Key Takeaways & Evidence Grounding
- ChatGPT became the fifth largest website globally, surpassing Wikipedia, WhatsApp, Amazon, and X.
- GenAI app downloads increased 319% year-over-year, and average monthly visits to GenAI sites grew 76%.
- 95% of ChatGPT users also use Google, showing complementary search behavior.
- GenAI referrals to transactional sites achieved an estimated conversion rate of ~7%, with over 1.1 billion referral visits in June 2025.
- News-related searches on ChatGPT rose 212% in 18 months, while organic traffic to news sites fell 26% since Google introduced AI Overviews.
Connected Companies & Entities
5 Entities mapped“The current 'Generative AI Landscape Report 2025' from Similarweb reveals how user behavior is drastically changing....”
“ChatGPT is now the fifth largest website, ahead of Wikipedia, WhatsApp, Amazon, and X....”
“The study shows that 95% of ChatGPT users still use Google, and Gemini from Google is growing quickly....”
“The article mentions that 'red alert' was triggered at Google and challenger OpenAI, referring to the competitive pressure....”
“The search engine Perplexity performs better in the DACH region than the global average and is gaining significance there....”
Ontology Mapping & Concepts
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