Similarweb’s October 2026 rankings put Google first and YouTube second, with ChatGPT rising to fifth worldwide at 6.048 billion browser visits, up 2.15% from September.

The top 10 were Google, YouTube, Facebook, Instagram, ChatGPT, X, Reddit, Microsoft Bing, TikTok and WhatsApp.

Google led by a wide margin with 88.44 billion visits, about 14 times ChatGPT’s total, and its traffic rose 3.86%.

ChatGPT was the only AI assistant domain in the top 10, and its 2.15% gain was the smallest among the nine sites that grew; Reddit was the only site to lose visits, falling 1.28%.

TikTok posted the fastest growth among the top 10, climbing 6.06% to seventh place, while WhatsApp moved to eighth and Reddit slipped to ninth.

Facebook and Instagram ranked third and fourth, and WhatsApp Web placed tenth, underscoring that Meta’s services draw substantial browser traffic alongside their native apps.

The ranking measures desktop and mobile browser visits, not standalone app use, so it captures open-web activity rather than total engagement and may understate mobile-first services such as TikTok and WhatsApp.

ChatGPT’s fifth-place ranking reflects the growing use of generative AI for conversational search, coding and research, a shift that could divert queries from traditional search results and reduce referral traffic to publishers.

That shift poses a challenge for publishers; Reddit is monetizing its data through AI partnerships, while Meta and Alphabet are expanding their own AI models.

Reddit’s prominence in search results helps support its browser traffic, while Bing’s position is attributed to enterprise searches, default-browser indexing and Copilot integration.

The figures are Similarweb estimates, and the October comparison captures only one month of change, not a longer-term trend; it also excludes AI assistant domains outside the top 10.

A separate Similarweb chart showed visits to claude.ai/code rising from about 0.9 million in October 2025 to about 11.2 million in September 2026, but that subfolder series is not comparable with October’s full-domain totals.