File every email in seconds
AI-powered folder suggestions for Outlook — no rules, no configuration.
Folder Suggest uses on-device AI to instantly suggest the right Outlook folder for each email — no rules to set up, no cloud processing.
💡 Best experience in Outlook classic — supports pinned pane for hands-free filing
Folder Suggest is a free Outlook add-in that uses on-device AI to recommend the right email folder for every message you read. Unlike Outlook Rules — which require you to pre-define conditions for each sender or subject — it reads the content of each email and matches it against messages already stored in your folders. No rules to create. No training required. It works immediately with whatever folder structure you already have.
The AI model runs entirely inside your browser, so no email content is ever sent to a server. On first use, a lightweight model (~20 MB) is downloaded once and cached locally. Every subsequent suggestion takes a second or two. Accept the top match with one click, or choose from up to seven ranked alternatives. An Undo button appears immediately. Folder Suggest works with Outlook classic for Windows, New Outlook, and Outlook on the web.
Everything you need, nothing you don't
A focused tool that does one thing well — getting your inbox to zero faster.
On-device AI
The AI model runs entirely on your device. No email content is ever sent to external servers.
Instant suggestions
Scores all your folders in under a second after the first run. No configuration or training needed.
Stay-open pane
Pin the pane in classic Outlook and it auto-refreshes as you switch emails — zero extra clicks.
Dark mode
Automatically matches your Outlook theme — light or dark — for a seamless feel.
Works with your folders
No setup required. Folder Suggest reads your existing folder structure and learns from it instantly.
Undo in one click
Moved an email by mistake? An undo button appears immediately after every move.
How it works
Open an email
Select any email in your inbox that you want to file away.
Click Suggest Folder
Hit the button in the Outlook ribbon. The pane opens and ranks your folders instantly.
Move it
Select the right folder from the list and click Move. Done — inbox zero, one email at a time.
Your emails never leave your device
Folder Suggest processes everything locally using a small AI model that runs in your browser. Microsoft Graph is used only to read your folders — nothing is stored on our servers.
Read the full privacy policy →- No email content sent to external servers
- No analytics or tracking cookies
- No account creation required
- Folder embeddings cached locally on your device only
- Minimum required Microsoft Graph permissions
From the blog
May 2026
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7 Microsoft 365 Tips to Get More Out of Outlook
Seven underused features that cut inbox management time — from Focused Inbox and Quick Steps to AI-powered folder suggestions.
Read →March 2026
Best Outlook Add-Ins 2026: 5 That Actually Save Time
We tested dozens of Microsoft Outlook add-ins and picked the 5 best free ones for 2026 — from AI folder sorting to one-click scheduling.
Read →Frequently asked questions
Is Folder Suggest really free?
Does it read my emails?
Which versions of Outlook does it support?
What happens to my data?
Can my IT admin deploy it to the whole organisation?
Start filing emails faster today
Available free on Microsoft Marketplace. Works in Outlook classic, Outlook on the web, and new Outlook.
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