Runs locally — your emails never leave your device

Find any email in seconds

AI-powered search for Outlook — faster and smarter than native search.

Inbox Search is an Outlook search add-in that builds a local fingerprint index of your mailbox using on-device AI, so you get instant, accurate results without anything leaving your computer.

Install Free to try · Microsoft Marketplace

After you install, open Inbox Search from any email and allow it to read your mail when Microsoft asks. Some workplaces need IT to approve this once: guide for IT admins. Step-by-step install guide

Inbox Search is an Outlook add-in that replaces Outlook's slow, keyword-only search with fast, AI-powered hybrid search. It builds a local fingerprint index of every email in your primary mailbox using semantic embeddings and TF-IDF keyword analysis, so you can find messages by meaning — not just exact words. Search "budget discussion from last quarter" and get results even if none of your emails contain that exact phrase — including emails that Outlook search quietly drops.

Your emails are indexed and searched on your device. No email content is ever sent to a server. The index stays on your device and catches up with new mail each time you open Inbox Search. Inbox Search works with Outlook on the web, new and classic Outlook for Windows, and Outlook for Mac.

Inbox Search add-in showing the search interface with filter options for sender, recipient, folder, and attachments

Outlook search that actually works

Outlook's built-in search is slow and misses what you're looking for. Inbox Search fixes that.

Semantic + keyword search

Combines AI embeddings with TF-IDF keyword matching. Find emails by meaning, not just exact words.

Instant results

Results appear as you type, ranked by relevance.

Private by design

The AI model runs entirely on your device. No email content is ever sent to external servers.

Local index

Indexes your mailbox once and keeps the index on your device, refreshed each time you open Inbox Search.

Nothing to configure

Install it, sign in, and search. No rules or training needed.

Windows, Mac and web

Outlook on the web, new and classic Outlook for Windows, and Outlook for Mac.

How it works

1

Install the add-in

Add Inbox Search to Outlook, open it from any email and sign in with your Microsoft account. It then indexes your mailbox.

2

Index builds locally

A lightweight AI model creates a fingerprint of each email — all processing happens on your device.

3

Search instantly

Type what you're looking for in plain language. Results are ranked by meaning, not just keywords.

Your emails stay on your device

Inbox Search processes everything locally using a small AI model that runs in your browser. Microsoft Graph is used only to read your emails for indexing — your email is never stored on our servers.

Read the full privacy policy →
  • No email content sent to external servers
  • No tracking cookies
  • No account creation required
  • Search index stored locally on your device only
  • Minimum required Microsoft Graph permissions

Frequently asked questions

Outlook's search is keyword-based — it only finds emails containing the exact words you type. Inbox Search uses a hybrid of semantic AI embeddings and keyword matching, so it understands meaning. Search for "travel expenses from the Amsterdam trip" and it will find relevant emails even if they don't contain those exact words. It also ranks results by relevance rather than just date.
No. All processing happens entirely on your device. The AI model runs locally in your browser using WebAssembly. Your email content is never transmitted to our servers or any third-party service. The search index is stored in your browser's local storage.
Results appear as you type, ranked by relevance. The first time you open Inbox Search it indexes your mailbox, which can take a while for a large mailbox: keep the pane open until it finishes.
Inbox Search works with Outlook on the web (outlook.office.com and outlook.live.com), new and classic Outlook for Windows, and Outlook for Mac. It runs as a standard Office Add-in inside Outlook's task pane.
Not in the current version. Microsoft Graph does not provide access to the Exchange Online In-Place Archive. Inbox Search indexes your primary mailbox, including all folders. Archive mailbox support may be added if Microsoft extends their API in the future.
Yes. The free plan includes unlimited keyword search and mailbox indexing, plus 5 AI finds a day — a find is only used when AI search surfaces an email and you open it. Pro removes the daily limit for €7.99/month or €79/year, VAT included, and starts with a 7-day free trial. See pricing.

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Stop losing emails in your inbox

Inbox Search is an Outlook add-in. Fast, private, semantic search — available now.

Install from Microsoft Marketplace

After you install, open Inbox Search from any email and allow it to read your mail when Microsoft asks. Some workplaces need IT to approve this once: guide for IT admins. Step-by-step install guide