Instead of Fastmail, try one of these 4.
Every alternative is lined up against Fastmail on what people actually switch for: price, open source, self-hosting, offline use and platforms. Fastmail sits in the first row, so you can see what you give up.
Alternative
Price
Open source
Self-host
Offline
Platforms
Likes
FastmailWhat you have now
Fast, private email with your own domain and calendar.
PricePaid
from $5/mo
Open sourceNo
Self-hostNo
OfflineNo
Platforms
Web · iOS · Android
Gmail#1
The default free inbox, with smart categories and search.
PriceFreemium
workspace from $7
Open sourceNo
Self-hostNo
OfflineNo
Platforms
Web · iOS · Android
LikesVisit ↗
Encrypted email and calendar with a free tier.
PriceFreemium
pro €3/mo
Open sourceYes
Self-hostNo
OfflineNo
Platforms
Web · iOS · Android
LikesVisit ↗
Mailfence#3
Encrypted email suite with calendar and document tools.
PriceFreemium
Open sourceNo
Self-hostNo
OfflinePartial
Platforms
Web · Android · iOS
LikesVisit ↗
Posteo#4
Low-cost German mailbox focused on privacy and sustainability.
PricePaid
Open sourceYes
Self-hostNo
OfflineNo
Platforms
Web
LikesVisit ↗
How to read this. “Yes” means fully supported by the maker. “Partial” means it works with caveats. Likes reflect community popularity; vendors can’t pay for them or for placement. How we compare.
Fastmail alternatives at a glance
Fastmail is a paid email app (from $5/mo). We compared 4 alternatives: 2 are open source, 0 are completely free, 0 can be self-hosted and 0 work fully offline. The most popular is Gmail, with 3.8k likes.