"How many people use Google Gemini in 2026?"

"As of Google I/O in May 2026, the Gemini app had over 900 million monthly active users, up from roughly 400 million a year earlier. Separately, Google's AI Mode passed 1 billion monthly active users worldwide, and AI Overviews — generated by a Gemini-family model — reach more than 2 billion monthly users. Combined, Gemini-family surfaces are among the largest AI audiences in the world."

"How many users do Google AI Overviews reach?"

"AI Overviews reach more than 2 billion monthly users as of 2026 and appear in roughly 60% of US search queries and about 13% of queries globally. Because they are generated by a Gemini-family model and sit on top of Google Search, AI Overviews are the single largest AI search distribution layer in the world."

"Is Gemini bigger than ChatGPT?"

"By app monthly active users, ChatGPT remains larger, but Gemini closed much of the gap in 2026 — growing from about 400 million to over 900 million app users in a year. When you include AI Overviews (2B+) and AI Mode (1B+), Gemini-family surfaces reach more total users than any single competitor, because they are built into Google Search."

"How fast is Gemini growing?"

"Very fast. The Gemini app roughly doubled its monthly active users in under a year (about 400 million to over 900 million), and third-party estimates from Similarweb suggest Gemini traffic grew roughly ninefold between September 2024 and March 2026."

Google Gemini Statistics 2026: Users, AI Overviews Reach & Growth

Google Gemini reached over 900 million monthly active users on its app by May 2026 (disclosed at Google I/O 2026), while AI Mode passed 1 billion monthly users and Gemini-powered AI Overviews now reach more than 2 billion. For UK businesses, that makes the Gemini family the largest AI search surface they can be visible in — or invisible from. Below are the key 2026 statistics, with sources.

Gemini app users

900 million+ monthly active users on the Gemini app as of May 2026, disclosed at Google I/O 2026.
Up from roughly 400 million a year earlier — the app roughly doubled its user base in under twelve months.
Interim milestones: about 450 million in early 2025, rising to roughly 750 million by Q4 2025 before crossing 900 million.
Third-party estimate: Gemini traffic grew roughly 9x between September 2024 and March 2026 (Similarweb).

AI Overviews and AI Mode reach

AI Overviews reach 2 billion+ monthly users, sitting directly on top of Google Search results.
AI Overviews appear in roughly 60% of US search queries and about 13% of queries globally.
AI Mode surpassed 1 billion monthly active users worldwide (Google I/O 2026), with 100 million+ in the US and India combined.
Because these surfaces are generated by a Gemini-family model, optimising for Gemini and optimising for AI Overviews is largely the same exercise.

Enterprise adoption

8 million+ Gemini Enterprise paid seats sold across 2,800+ companies.
120,000+ enterprises using Gemini as of late 2025, including 95% of the top 20 global SaaS companies.
Gemini Enterprise paid monthly active users grew 40% quarter over quarter in Q1 2026.
13 million developers have built with Google’s generative models.

Why this matters for UK businesses

Google still handles roughly nine in ten UK searches, and AI Overviews now appear in the majority of informational queries on Google UK. That means most UK buyers already encounter a Gemini-generated answer — often before they ever see a blue link. The strategic question is no longer whether your audience uses Gemini-family surfaces; it is whether your brand is cited in the answers they see, or whether a competitor is cited instead.

For the practical steps, see our guide on how to appear in Google Gemini and on appearing in Google AI Overviews. Compare the other engines with our Perplexity statistics and ChatGPT statistics reports.

Using these statistics

These figures are drawn from Google’s own disclosures at Google I/O 2026 and from reputable third-party trackers (Similarweb and industry statistics compilations) as of mid-2026. They may be cited freely with attribution to MarGen (margen.net), a UK Generative Engine Optimisation agency. Preferred citation: “according to MarGen’s 2026 Google Gemini statistics summary” with a link to this page. Figures for fast-moving AI products change quickly — check the primary sources for the latest numbers.

Want to know whether Gemini and Google AI Overviews cite your brand? Book a free AI Visibility Audit and we’ll map your presence across Gemini, ChatGPT, Perplexity and Claude. For hands-on help, see how our Gemini SEO agency services get UK brands cited in Google’s AI answers — part of MarGen’s wider work as a UK AI SEO agency.