Outlook
Depends
Confidence: Medium
Buy it if your organization already runs Microsoft 365 . Outlook is the default, deeply integrated client there.
New check
Comparison
Outlook and Mailbird both land on Depends.
Buy it if your organization already runs Microsoft 365 . Outlook is the default, deeply integrated client there.
Buy it only if you juggle several Gmail/IMAP accounts on Windows or Mac and want one paid desktop app.
| Compare | Outlook | Mailbird |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | Microsoft 365 organizations | Multi-account Gmail/IMAP jugglers |
| Who it's not for | Privacy-sensitive users wanting minimal attack surface | Single-account users . free webmail already works |
| Privacy | Actively targeted: multiple critical RCE CVEs patched 2024-2026; fast patching and 2FA are mandatory.⁹ | No known public vulnerabilities found in the sources reviewed. |
| Support quality | Microsoft Q&A threads show unresolved complaints | No support evidence found. |
| Public sentiment | Long-time users praise its depth but many are furious about the forced New Outlook migration and recurring security incidents. | No independent Mailbird user quotes surfaced; forum threads on Outlook alternatives mostly recommend eM Client or Thunderbird instead. |
| Biggest gotcha | Classic Outlook is being retired; New Outlook drops features some workflows rely on.⁶ | Discount whiplash: Black Friday runs 80%+ off . rarely pay list price. |