Apptopia: ChatGPT's US market share fell from 69.1% to 45.3% between Jan. 2025 and Jan. 2026; Gemini rose from 14.7% to 25.1%, Grok rose from 1.6% to 15.2%
Google, Grok are gaining ground on ChatGPT as the chatbot market expands. — ∙ Paid — OpenAI's rivals are cutting into ChatGPT's lead.
Context & Ripple Effects
ChatGPT entered this period with a much larger installed audience, but Gemini was already showing faster user growth late in 2025: Gemini's MAUs grew about 30% from August to November while ChatGPT's rose about 5%. Apptopia now shows that momentum translating into a materially less concentrated US chatbot market.
The shift also builds on an earlier consumer-app ranking in which Gemini held the No. 2 mobile position behind ChatGPT. The key development is not ChatGPT's disappearance, but the emergence of multiple services with meaningful shares.
First-order effects
- ChatGPT's US share falls below half of the measured chatbot market, while Google and Grok become substantially more consequential consumer AI destinations.
- Gemini gains a clearer position as the leading challenger, and Grok's jump from a marginal base to 15.2% gives users and developers another large platform to consider.
Second-order effects
- OpenAI faces greater pressure to defend engagement and paid conversion as rivals gain audience share; its earlier mobile consumer-spending lead, including $2B in global app spending, no longer by itself signals unchallenged reach.
- Google, xAI, and other chatbot providers have stronger incentives to compete for default placement, product integration, and differentiated features rather than treating ChatGPT as the sole consumer gateway.
Third-order effects
- If these share movements persist, consumer AI may develop as a multi-platform market in which distribution and habitual access matter alongside model quality, reducing the likelihood that one standalone assistant controls the interface.
- Fragmentation could make assistant choice more contextual—across devices, ecosystems, and tasks—while raising the strategic value of retaining users inside each provider's broader product surface.
The trend: This is one data point in AI's distribution phase, where consumer chatbot leadership is being contested through reach, ecosystem placement, and repeat usage rather than model capability alone.