The Mailstrom alternative built for Microsoft 365.
Mailstrom groups your inbox into bundles — by sender, subject or size — so you can act on many emails at once. mailbud takes a different approach: it reads each incoming Outlook email and files it into the right folder automatically — natively inside Microsoft 365, with no rules and no separate inbox.
14-day free trial · cancel any time
Nora Halperin
Re: Q2 invoice & remittance
Attaching the February invoice with the corrected remittance note. Payment due the 28th…
mailbud reads —
“Vendor invoice. File under Invoices.”
- Microsoft 365· Native Graph API
- Never sends for you
- AES-256· Encrypted tokens
- EU hosting
What you get with mailbud
Reads intent, not keywords
mailbud interprets what each email is about and files it the way a thoughtful colleague would.
Your own Outlook folders
Files into your real folder structure under a prefix you choose — nothing proprietary, nothing to migrate.
Learns from you
Every correction becomes a private example, so filing matches the way you organize over time.
Review queue
Uncertain mail is held with the reasoning shown, so nothing important is silently misfiled.
Never sends for you
mailbud reads and files only. It never sends, replies to, or forwards mail on your behalf.
Private by design
AES-256 encrypted tokens, EU hosting, and your mail is never used to train any AI model.
mailbud vs. Mailstrom
An honest look at where each tool fits.
| mailbud | Mailstrom | |
|---|---|---|
| Built natively for Microsoft 365 & Outlook | Provider-agnostic | |
| Automatically files new incoming mail | ||
| Reads intent with AI | ||
| Files into your own named folders | Bundles | |
| Learns from your corrections | ||
| Never sends on your behalf |
When Mailstrom is the right call
Mailstrom is handy for quickly bundling and clearing large volumes of similar mail in one sweep.
Mailstrom helps you act on bundles manually. mailbud removes the manual step entirely — new mail is read and filed into the right Outlook folder automatically as it arrives.
- Native Microsoft 365 integration
- Files into your existing Outlook folders
- Plain-language setup, no rules to maintain
Nora Halperin
Re: Q2 invoice & remittance
Attaching the February invoice with the corrected remittance note. Payment due the 28th…
mailbud reads —
“Vendor invoice. File under Invoices.”
Frequently asked
What is the best Mailstrom alternative for Outlook?
For Microsoft 365 users, mailbud is a strong alternative: it connects through the official Graph API, reads each incoming email, and files it into the Outlook folder you described in plain language — automatically and without rules to maintain.
How is mailbud different from Mailstrom?
Mailstrom helps you act on bundles manually. mailbud removes the manual step entirely — new mail is read and filed into the right Outlook folder automatically as it arrives.
Is Mailstrom still a good choice?
Mailstrom is handy for quickly bundling and clearing large volumes of similar mail in one sweep.
Will mailbud send email for me?
No. mailbud only reads and files mail. It never sends, replies to, or forwards messages on your behalf.
What does mailbud cost?
14 days free, then €14.99 per month, cancellable any time.
Switch to an organizer built for Outlook
14 days free. See your inbox sort itself.
14-day free trial · cancel any time