AI Inbox Assistants Compared: Gemini, Copilot, Apple Intelligence and YAFOY Insight

Every big tech company now promises the same thing: let AI read your messages, and it'll tell you what matters.

Gmail summarizes threads. Outlook ranks your inbox. Your iPhone summarizes notifications. Even WhatsApp can sum up a busy chat. So why would anyone need another AI assistant?

The answer is in one word: coverage. Each assistant sees a different slice of your messages. Here's what each one actually reads, and which slice matters to you.

Google has built Gemini deeply into Gmail. Thread summaries, "Help me write" and suggested replies are now available to free users in several languages, on the web, Android and iPhone. More advanced features, like asking questions across your inbox and Gmail's AI Inbox with priorities, require a paid Google AI or Workspace plan, and some started in the US only.

Covers: your Gmail. Doesn't cover: Outlook, Slack, Teams, WhatsApp or texts.

Microsoft's Copilot can summarize email threads in Outlook on Windows, Mac, web, Android and iPhone, and "Prioritize my inbox" marks incoming mail as high, normal or low priority with a short reason. Copilot in Outlook is included in Microsoft 365 Personal and Family plans, and in business Copilot plans, with some features rolling out gradually.

Covers: your Outlook email. Doesn't cover: other email accounts' context, Slack, WhatsApp or texts.

On supported devices (iPhone 15 Pro and newer models, and Macs and iPads with Apple silicon), Apple Intelligence can summarize and prioritize notifications, and Mail on iPhone sorts messages into categories with a Primary view and thread summaries. Much of the processing happens on the device. Apple paused summaries for news apps in early 2025 after inaccurate headlines, then brought them back with clearer labels.

Covers: notifications and Apple Mail on supported Apple devices. Doesn't cover: Android, or detailed priorities across conversations.

WhatsApp's optional Message Summaries use Meta AI to sum up unread messages in a single chat, using a privacy system Meta calls Private Processing. It launched in the US in English, and summaries across several chats were still in testing.

Covers: one WhatsApp chat at a time. Doesn't cover: anything outside WhatsApp.

Insight takes a different approach. YAFOY first brings your messages into one inbox: Gmail, Outlook, Teams and Slack on desktop browsers, Android and iPhone, plus WhatsApp, Telegram, Signal, texts and more on Android. Then, up to three times a day, Insight reads short excerpts of your recent conversations across all of them and writes one briefing: what changed, what needs a reply, what's due, and what can wait, each linked to its conversation.

Before anything goes to the AI model (Google Gemini, through our platform provider), YAFOY masks email addresses and phone numbers and leaves out banking and one-time-code messages; Signal is excluded by default. That redaction is partial, and we say so. See how Insight works →

Covers: connected Gmail, Outlook, Slack and Teams on desktop and phones, plus supported personal chat apps on Android. Limits: desktop does not capture phone notifications or mirror your phone inbox; Teams requires an eligible work or school account and any required organization approval. The free plan allows one Insight a day.

	Gemini in Gmail	Copilot in Outlook	Apple Intelligence	Meta AI in WhatsApp	YAFOY Insight
What it reads	Gmail	Outlook mail	Notifications, Apple Mail	One WhatsApp chat	Email, Teams, Slack, chats (Android)
Cross-app priorities	No	No	Notification priority	No	Yes
Summaries	Threads; inbox Q&A (paid)	Threads	Notifications, Mail threads	Unread messages in a chat	Daily briefing across apps
Devices	Web, Android, iPhone	Windows, Mac, web, Android, iPhone	Supported Apple devices	iPhone, Android	Desktop browser, Android, iPhone
Where AI runs	Google cloud	Microsoft cloud	Mostly on device + Apple's private cloud	Meta's Private Processing	Google Gemini via our provider, after partial redaction
Cost	Basic free; advanced in paid Google AI plans	Included in Microsoft 365 Personal/Family and business Copilot	Free on supported devices	Free, optional	Free (1/day); Mobile 10/day; Pro 20/day

As of October 2026.

You don't have to pick one. If you live in Gmail, Gemini is excellent there. If you live in Outlook, so is Copilot. If you have a recent iPhone, notification summaries come free. Where they all stop is at the edge of their own app.

If your day is spread across Gmail, Outlook, Teams, Slack and WhatsApp, and the question you need answered is "what needs me first, across all of it?", that's the gap Insight is built for.

Try YAFOY free and get your first cross-app Insight today.

At your desk, YAFOY brings connected Gmail, Outlook, Slack and Teams into the same browser experience. Start with Insight, then use Inbox search and the conversation pane to check the source and reply. Insight only considers recent conversations available on that device; it does not read a synced copy of your phone inbox.