Inbox Search Is Now Available on Microsoft Marketplace

Inbox Search — an Outlook add-in that uses on-device AI for fast, semantic email search — has been approved by Microsoft and is now live on Microsoft Marketplace. You can install it today from the marketplace or from within Outlook.

What is Inbox Search?

Inbox Search is an Outlook add-in that builds a local fingerprint index of every email in your primary mailbox. It combines semantic AI embeddings with TF-IDF keyword matching to let you find emails by meaning — not just exact words. If you've been struggling with Outlook search not finding emails, Inbox Search was built to solve exactly that.

Search "budget discussion from last quarter" and get results even if none of your emails contain that exact phrase. Search a specific name or project code and it surfaces the exact match first. Both approaches work together in a single query.

What makes it different

• On-device AI. The AI runs on your device. No email content is ever sent to a server, and there is no enterprise license to buy.
• Hybrid search. Combines semantic understanding with precise keyword matching. Natural language queries and exact term searches both work — in the same search box.
• Fast results. Results appear as you type and are ranked by relevance.
• Searches all folders. Inbox, Sent, Drafts, subfolders — everything in your primary mailbox is indexed and searchable from one place.
• Simple setup. Install it, open it from any email, sign in with your Microsoft account, and start searching while it indexes your mailbox.

How to install

There are two ways to get Inbox Search:

• From Microsoft Marketplace: Visit the Inbox Search listing on Microsoft Marketplace and click "Get it now."
• From within Outlook: Click the "Get Add-ins" or "Add-ins" button in your Outlook ribbon, search for "Inbox Search," and install it directly.

Inbox Search works with Outlook on the web, new and classic Outlook for Windows, and Outlook for Mac. It requires a Microsoft 365 or personal Microsoft account.

What happens after install

When you first open Inbox Search, it begins indexing your mailbox. You can start searching right away — results improve as the index builds, so keep the pane open until it finishes. The index is stored on your device.

Privacy by design

Inbox Search was built with a simple rule: your email content never leaves your device. Your emails travel only between Microsoft and your device. Your email content never reaches our server. There are no tracking cookies and no account creation. Read the full privacy policy for details.

If you organize emails into folders, you might also like Folder Suggest — an Outlook add-in that uses AI to recommend the right folder for every email. One organizes, the other finds.