Outlook.com comparisons
Outlook.com is compared head-to-head with Gmail, Proton Mail and iCloud Mail and more: 7 head-to-heads in Personal Email Services, each with the specs and prices we checked.
Outlook.com head-to-head
- Outlook.com vs Gmail
- Outlook.com vs Proton Mail
- Outlook.com vs iCloud Mail
- Outlook.com vs Zoho Mail
- Outlook.com vs Fastmail Masked Email
- Outlook.com vs Fastmail Email
- Outlook.com vs GMX Mail
Outlook.com vs each of them
| # | Tool | Free plan | Paid from | Mailbox storage | Attachment limit | Custom domain | Email aliases | Score |
|---|---|---|---|---|---|---|---|---|
| 2 | Outlook.com | Yes | 100 GB | 25 MB | No | Yes | 9.2 | |
| 1 | Gmail | Yes | $1.99/mo | 100 GB | 25 MB | No | Yes | 9.4 |
| 3 | Proton Mail | Yes | $3.99/user/mo | 15 GB | Yes | 9.0 | ||
| 4 | iCloud Mail | Yes | 50 GB | 5120 MB | Yes | Yes | 8.8 | |
| 5 | Zoho Mail | Yes | $1/user/mo | 5 GB | 30 MB | 8.7 | ||
| 6 | Fastmail Masked Email | No | $4/user/mo | 5 GB | 50 MB | 8.6 | ||
| 7 | Fastmail Email | No | 5 GB | 50 MB | No | Yes | 8.5 | |
| 8 | GMX Mail | Yes | Free | Yes | 8.4 |
Compare Outlook.com with any personal email service
These are the matchups our editors wrote up. The compare tool pairs Outlook.com with any other product in Personal Email Services — and up to four at once — from the same checked specs.
Compare Outlook.com with any tool side by side →
Every personal email services head-to-head →
Our full Outlook.com verdict, pricing and fact sheet →
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Compared by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update