Personalized bulk email with a different attachment for every recipient — invoices, offer letters, certificates — sent straight from your own Microsoft 365 mailbox.
Word mail merge can’t attach a different file per person. Old add-ins are Windows-only and breaking in new Outlook. MergeBird fixes both — on every device.
Add a column with each person’s file name, upload the files, and MergeBird matches them automatically — so everyone gets their own document, not a shared one.
Messages send straight from your Microsoft 365 mailbox. We never see, store, or route your subjects, bodies, recipients, or attachments.
Built on the modern Office Add-ins platform — runs in new Outlook on Windows, Mac, and the web. No desktop-only lock-in.
{{first_name}} tokens with fallbacks in the subject and body. Import from CSV/Excel or paste a table.
Smart pacing respects Microsoft’s limits, with a dry-run mode, resumable sends, an unsubscribe footer, and a suppression list.
See exactly what each recipient gets — merged subject, body, and attachment — before a single email goes out.
Because it sends from your real mailbox, replies land in your inbox and your sends look 100% human — not blasted from a relay.
Compose your template with personalization tokens, then drop in your CSV/Excel of recipients.
Match a file to each recipient, then preview the exact message anyone will receive.
MergeBird sends each one individually, paced and resumable. Check Sent Items — it’s all there.
No subscription required — grab a credit pack if you only send now and then.
Yes. MergeBird sends through Microsoft’s own APIs from your mailbox. Your message content, recipients, and attachments never touch our servers — we only ever record an anonymous send count for your plan.
Yes — new Outlook for Mac, Windows, and the web. That cross-platform support is a core reason MergeBird exists; most old mail-merge tools are Windows-only.
Add a column with each row’s file name, upload the files, and MergeBird matches them by name automatically — showing you how many matched before you send.
MergeBird paces sends to stay within Microsoft’s limits and shows progress as it goes. It’s built for personalized, moderate-volume campaigns — not spam blasts.
That’s exactly why we built it. Microsoft’s new Outlook drops the old COM/VSTO add-ins — MergeBird runs on the modern platform that new Outlook supports, on every device.
Free for your first 50 personalized sends every month. Coming soon to Microsoft AppSource — drop your email and we’ll tell you the moment it’s live.