AI assistants built into the apps you already use in 2026
By AppDuo Editorial Team · Fact-checked
This guide is for people who want AI inside Gmail, Word, WhatsApp, X or their browser rather than a separate chatbot. Each option is tied to one ecosystem: Google, Microsoft, Meta, X, or the browser itself, so the right pick depends on the apps you use most. They differ in what is free, what paid plans cost and how chat data is handled.
Suited to Gmail and Drive users7.5/101. Gemini
Gemini sits inside Gmail, Drive, Docs and Android. Its fairly complete free tier includes Deep Research, Gemini Live and image creation. Google AI Plus costs $4.99/month on the US App Store with 400 GB of storage, and AI Pro costs $19.99/month with 5 TB. Trade-offs: limits are given only as multipliers, and human reviewers may read a subset of chats, which can be kept for up to three years.
Read our full Gemini review
Suited to Word, Excel and Outlook users6.8/102. Microsoft Copilot
Copilot suits Windows, Edge and Microsoft 365 users, and the free tier needs only a Microsoft account. Copilot in the Word, Excel and Outlook desktop apps comes with Microsoft 365 Personal at $9.99/month, with a one-month trial. Trade-offs: usage limits are not published as numbers, and the policy allows data to be used for model training.
Read our full Microsoft Copilot review
Free option inside messaging and social apps6.6/103. Meta AI
Meta AI is built into Facebook, Instagram, WhatsApp and Messenger, and its core experience is free, which Meta says is not changing. Meta One Core ($7.99/month per Meta's announcement) is only in limited testing. Weigh privacy: Meta's policy says data is used for personalisation including ads, and TechCrunch reported Meta plans to sell targeted ads based on AI chats.
Read our full Meta AI review
For X users7.1/104. Grok
Grok suits people who follow news on X, with live X and web search with citations, plus Excel and Outlook add-ins. Plus costs $8/month per the pricing page and bundles X perks. Documented incidents include antisemitic posts in July 2025 and sexualized deepfakes that led to an EU investigation, whose outcome the sources read do not state. Its privacy policy allows user content to be used for training.
Read our full Grok review
For people who work in the browser6.7/105. Dia
Dia is a macOS and Windows browser that answers from your open tabs and tools like Slack, Notion and Google Workspace. The free version has no AI; Better Answers costs $10/month, and Dia offers a 14-day trial with no card needed. The interface is English-only, content goes to OpenAI, Anthropic and Google (contractually barred from training on it), and independent reviews are scarce.
Read our full Dia review
AI assistants built into the apps you already use at a glance: data table
Data (JSON)Prices are per month in the currency the vendor lists, from the plans checked on the date shown. Download the full data as JSON.
| App | Score | Free plan | Cheapest paid plan | User rating | Platforms | Checked |
|---|---|---|---|---|---|---|
| Gemini | 7.5 | Yes | $4.99Google AI Plus | 4.5/5Google Play (United States) | Web, iOS, Android | Nov 10, 2026 |
| Microsoft Copilot | 6.8 | Yes | $9.99/userMicrosoft 365 Personal | 4.7/5App Store (United States) | Web, iOS, Android, Windows, macOS | Nov 10, 2026 |
| Meta AI | 6.6 | Yes | $7.99Meta One Core | 4.6/5Google Play (United States) | Web, iOS, Android, macOS | Nov 10, 2026 |
| Grok | 7.1 | Yes | $8Plus | 4.8/5Google Play | Web, iOS, Android, API | Nov 10, 2026 |
| Dia | 6.7 | Yes | $10Better Answers | 4.8/5Product Hunt | macOS, Windows | Nov 10, 2026 |
How we chose
These picks come from AppDuo's published research on each product, based on public sources; AppDuo did not test them hands-on. We compared price for the same audience (here, personal plans), features, user ratings, privacy policies and documented incidents.
Frequently asked questions
Which options have free AI?
Gemini, Copilot, Meta AI and Grok all have free tiers; none publishes exact free usage counts. Dia's free version is a browser without AI.
What should I pick for AI in Word, Excel and Outlook?
Copilot is built into the Word, Excel, PowerPoint and Outlook desktop apps with Microsoft 365, from $9.99/month. In the Family plan only the owner gets AI. Grok also offers Excel and Outlook add-ins.
Are my chats used to train AI?
Grok's and Copilot's policies allow training use. Gemini may use activity for training while Keep Activity is on. Meta uses data for personalisation including ads. Dia contractually bars its AI providers from training on the data, though content sharing is on by default and Dia may use content to improve the product unless you opt out.
What controversies has Grok faced?
Documented incidents include antisemitic posts in July 2025 and sexualized deepfakes that led to an EU investigation; in April 2025 the Irish data protection regulator opened a probe into training on X posts. The outcomes of these investigations are not stated in the sources read.
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