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Fastmail vs Posteo

Higher score

FastmailIndie

8.7/ 10

PosteoIndie

8.5/ 10

Across 4 measured dimensions: Fastmail wins 1, Posteo wins 1 (2 tie / n/a)

[01]

Side by side.

8 dimensions

Metric	Fastmail	Posteo
Score Winner: left	8.7	8.5
Δ 90 days	— flat	— flat
Parent & badge	IndependentIndie	IndependentIndie
Founded	1999	2009
Best for	Anyone leaving Gmail for a custom domain	Users on a @posteo.* address who don't need a custom domain
Price per mo Winner: right	$5.00/ mo	$1.10/ mo
Renewal multiplier	—	—
Tagline	Privacy-focused email, no Google, no ads	€1/month ethical mail — no custom domain, ever

[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

Posteo4 pros · 4 cons

+ Pros

✓Flat €1/month, includes 2GB and full IMAP/SMTP
✓Accepts anonymous cash payment
✓100% renewable energy and transparent reporting
✓PGP-in-browser and full encryption at rest available

– Cons

✗No custom domain support, ever
✗Address must be @posteo.* only
✗Storage upgrades cost extra per GB
✗No mobile app — relies on standard IMAP clients

Make the call

Pick one and go.

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

VisitFastmail ↗Score 8.7 VisitPosteo ↗Score 8.5

← Read full Fastmail review·Read full Posteo review →

[03]

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