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Head-to-head · Personal Email Services

Outlook.com vs iCloud Mail

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score Outlook.com #2 in Personal Email Services 9.2/10 Free plan Free plan✓ 2 of 3 features Visit Outlook.com
iCloud Mail #4 in Personal Email Services 8.8/10 Free plan Free plan✓ 2 of 3 features Visit Apple

Outlook.com leads on 1 check, iCloud Mail on 2, and 3 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreOutlook.com · 9.2/10
  • Free planboth

Outlook.com scores higher on our rubric for personal email services: 9.2 against 8.8 out of 10; our editors rank them #2 and #4.

Outlook.com leads on mailbox storage: 100 GB versus 50 GB. iCloud Mail leads on attachment limit: 5120 MB versus 25 MB. iCloud Mail offers custom domain; Outlook.com doesn't.

Outlook.com is the better fit for people who use Microsoft services. iCloud Mail is the better fit for apple device users.

  • Outlook.com fits best

    People who use Microsoft services

  • iCloud Mail fits best

    Apple device users

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Outlook.com 9.2/10 Visit ↗ iCloud Mail 8.8/10 Visit ↗
At a glance
Editor score 9.2 8.8
Ranking #2 in Personal Email Services #4 in Personal Email Services
Best for People who use Microsoft services Apple device users
Pricing model Free plan + paid Free plan + paid
Starting price — —
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Desktop, Mobile Cloud, Desktop, Mobile
Platforms Web, Windows, macOS, iOS, Android Web, Windows, macOS, iOS
Integrations 3 integrations 2 integrations
Features Outlook.com 2/3 · iCloud Mail 2/3
Custom domain — ✓ (best)
Email aliases ✓ ✓
Ad-free inbox ✓ (best) Not checked yet
Specs
Mailbox storage 100 GB (best) 50 GB
Attachment limit 25 MB 5120 MB (best)
Platform access Web_mobile_desktop Web_mobile_desktop
Our review
Pros
  • Free accounts include 15 GB of mailbox storage.
  • Aliases, inbox rules, Focused Inbox, and Sweep help organize email.
  • Connects with OneDrive, Box, and Dropbox for file sharing.
  • Synchronizes mail and settings across Apple devices, Windows, and iCloud.com
  • Supports up to three @icloud.com aliases and custom domains with iCloud+
  • Mail Drop supports attachments up to 5 GB
Cons
  • Free accounts have less mailbox storage than the 100 GB paid tiers.
  • Ad-free email and calendar require a Microsoft 365 subscription.
  • Custom domains are not supported.
  • Free mail shares its 5 GB storage allotment with other iCloud data
  • Custom email domains require an iCloud+ plan
  • Standard messages are limited to 20 MB
Our verdict

Outlook.com is Microsoft's personal email service, available through a browser and Outlook apps. It brings email, calendar, and contacts together with spam filtering and 15 GB of mailbox storage on the free plan. Focused Inbox, inbox…

Read the review →

For people who use Apple devices, iCloud Mail provides an @icloud.com address and keeps mail changes and settings synchronized across iPhone, iPad, Mac, Windows, and iCloud.com. It also works with Apple Mail and Microsoft Outlook. The…

Read the review →
  1. Outlook.comPersonal Email Services 9.2Free plan
  2. iCloud MailPersonal Email Services 8.8Free plan

Strengths and trade-offs

  • Outlook.com — where it wins

    • Free accounts include 15 GB of mailbox storage.
    • Aliases, inbox rules, Focused Inbox, and Sweep help organize email.
    • Connects with OneDrive, Box, and Dropbox for file sharing.

    Where it doesn't

    • Free accounts have less mailbox storage than the 100 GB paid tiers.
    • Ad-free email and calendar require a Microsoft 365 subscription.
    • Custom domains are not supported.

  • iCloud Mail — where it wins

    • Synchronizes mail and settings across Apple devices, Windows, and iCloud.com
    • Supports up to three @icloud.com aliases and custom domains with iCloud+
    • Mail Drop supports attachments up to 5 GB

    Where it doesn't

    • Free mail shares its 5 GB storage allotment with other iCloud data
    • Custom email domains require an iCloud+ plan
    • Standard messages are limited to 20 MB
  • Outlook.com9.2/10 · Free plan

    A capable free email service with useful organization tools and Microsoft 365 upgrades.

    Visit Outlook.comFull verdict →
  • iCloud Mail8.8/10 · Free plan

    A practical email service for Apple users, with aliases and larger attachments through Mail Drop.

    Visit AppleFull verdict →

More comparisons

All personal email services comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update