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Head-to-head · Personal Email Services

iCloud Mail vs Fastmail Email

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score iCloud Mail #4 in Personal Email Services 8.8/10 Free plan Free plan✓ 2 of 3 features Visit Apple
Fastmail Email #7 in Personal Email Services 8.5/10 30-day trial Free trial✓ 2 of 3 features Visit Fastmail

iCloud Mail leads on 4 checks, Fastmail Email on 0, and 2 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 scoreiCloud Mail · 8.8/10
  • Free planonly iCloud Mail
  • Free trialonly Fastmail Email

iCloud Mail scores higher on our rubric for personal email services: 8.8 against 8.5 out of 10; our editors rank them #4 and #7.

iCloud Mail offers free plan; Fastmail Email doesn't. iCloud Mail leads on mailbox storage: 50 GB versus 5 GB. iCloud Mail leads on attachment limit: 5120 MB versus 50 MB. iCloud Mail offers custom domain; Fastmail Email doesn't.

iCloud Mail is the better fit for apple device users. Fastmail Email is the better fit for ad-free paid email with broad clients.

  • iCloud Mail fits best

    Apple device users

  • Fastmail Email fits best

    Ad-free paid email with broad clients

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 iCloud Mail 8.8/10 Visit ↗ Fastmail Email 8.5/10 Visit ↗
At a glance
Editor score 8.8 8.5
Ranking #4 in Personal Email Services #7 in Personal Email Services
Best for Apple device users Ad-free paid email with broad clients
Pricing model Free plan + paid Paid
Starting price — 30-day trial
Free plan ✓ (best) —
Free trial — 30 days
Deployment Cloud, Desktop, Mobile Cloud, Desktop, Mobile
Platforms Web, Windows, macOS, iOS Web, Windows, macOS, Linux, iOS, Android
Integrations 2 integrations 5 integrations
Features iCloud Mail 2/3 · Fastmail Email 2/3
Custom domain ✓ (best) —
Email aliases ✓ ✓
Ad-free inbox Not checked yet ✓ (best)
Specs
Mailbox storage 50 GB (best) 5 GB
Attachment limit 5120 MB (best) 50 MB
Platform access Web_mobile_desktop Web_mobile_desktop
Our review
Pros
  • 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
  • Ad-free mail with aliases, masked addresses, and custom domains on eligible plans
  • Works across web, desktop, mobile, and supported third-party email clients
  • Includes calendar, contacts, file storage, migration, and offline access
Cons
  • 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
  • There is no free plan
  • Custom domains and third-party client support depend on the plan
  • Attachment handling is approximately 50 MB per attachment
Our verdict

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 →

Fastmail Email is a paid email service for individuals, families, and businesses that want ad-free mail alongside calendar, contacts, and file storage. It supports web, Windows, macOS, Linux, iOS, and Android access, with deployment across…

Read the review →
  1. iCloud MailPersonal Email Services 8.8Free plan
  2. Fastmail EmailPersonal Email Services 8.530-day trial

Strengths and trade-offs

  • 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

  • Fastmail Email — where it wins

    • Ad-free mail with aliases, masked addresses, and custom domains on eligible plans
    • Works across web, desktop, mobile, and supported third-party email clients
    • Includes calendar, contacts, file storage, migration, and offline access

    Where it doesn't

    • There is no free plan
    • Custom domains and third-party client support depend on the plan
    • Attachment handling is approximately 50 MB per attachment
  • iCloud Mail8.8/10 · Free plan

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

    Visit AppleFull verdict →
  • Fastmail Email8.5/10 · 30-day trial

    A paid, ad-free email service with aliases, migration tools, and broad device support.

    Visit FastmailFull 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