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Fastmail vs Microsoft 365

Higher score
FastmailIndie
8.7/ 10
Microsoft 365
7.4/ 10
Across 4 measured dimensions: Fastmail wins 2, Microsoft 365 wins 0 (2 tie / n/a)
[01]

Side by side.

8 dimensions
MetricFastmailMicrosoft 365
Score
Winner: left
8.77.4
Δ 90 days
— flat— flat
Parent & badge
Winner: left
IndependentIndie
Microsoft Corp.
Founded
19992011
Best for
Anyone leaving Gmail for a custom domainBusinesses that need Exchange features and desktop Office
Price per mo
Winner: left
$5.00/ mo$6.00/ mo
Renewal multiplier
——
Tagline
Privacy-focused email, no Google, no adsOutlook + Exchange + Office, billed by the seat forever
[02]

What works, what doesn't.

Per provider
Fastmail4 pros · 3 cons
+ Pros
  • ✓Independent, privacy-respecting, no ads
  • ✓Excellent custom domain support
  • ✓JMAP protocol is genuinely faster
  • ✓Strong calendar/contacts integration
– Cons
  • ✗No end-to-end encryption (vs Proton/Tutanota)
  • ✗Australian jurisdiction concerns for some users
  • ✗Web UI looks dated
Microsoft 3654 pros · 4 cons
+ Pros
  • ✓Exchange features still unmatched for corporate mail
  • ✓Desktop Office included on Standard
  • ✓Strong compliance/eDiscovery features
  • ✓Wide IT support ecosystem
– Cons
  • ✗Admin center sprawl is genuinely terrible
  • ✗Pricing/SKU structure changes constantly
  • ✗2024 price hikes plus Copilot bundling
  • ✗New Outlook regressed long-standing workflows
Make the call

Pick one and go.

Both links are affiliate. Score doesn't move because of it.

VisitFastmail ↗Score 8.7VisitMicrosoft 365 ↗Score 7.4
← Read full Fastmail review·Read full Microsoft 365 review →
[03]

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