When comparing FastMail vs Canary Mail, the Slant community recommends Canary Mail for most people. In the question“What are the best e-mail clients for Android? ” Canary Mail is ranked 20th while FastMail is ranked 21st. The most important reason people chose Canary Mail is:
You can assign your default signature to an ALIAS for the same account or create an altogether new one.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Traditional revenue model increases likelihood of personal data privacy and safety
Depending on your point of view, requiring to pay for Fastmail is actually a positive aspect of the service. This way you know the company is at least making some revenue (they have been around since 2010) and you know who the customer is. Pricing is as follows (go here for their on-site pricing info).
Pro Human support team
As you are their customer, Fastmail provides human support.
Pro Offers more control over email
Gmail has a tendency to dumb down the interface (try to sort by sender). Fastmail gives full control over email, just like a "traditional" client would.
Pro Secure
Supports two-factor authentication, one-time passwords and fully encrypted connections.
Pro Fully responsive interface
The Fastmail interface is fully responsive across all browser sizes.
Pro Fast
As Fastmail does away with all the extra bells and whistles of Gmail it is super fast to interact with. It also has faster IMAP and SMTP performance than Gmail.
Pro Custom sieve scripts
You can write your own Sieve scripts for filtering/rerouting email.
Pro Simple email actioning
Like gmail, you can "Pin" emails to the top of your inbox to deal with later with either a checkbox or the keyboard shortcut. Like Gmail you can also both archive and delete emails.
Pro Offers IMAP migration tool
Get your old email out of Gmail easily with their migration tool.

Pro Adjustable spam filter
On writing this Fastmail has Basic, Normal, Aggressive or Customisable spam filtering which can be selected in the Advanced settings.
Each user has an individually trainable bayes database to improve spam filtering. You can train your personal bayes database by selecting some messages and using the Report spam and Report Non-Spam options from the Action menu on the Mailbox screen.
For IMAP users who don't use the web interface much, you can specify folders as spam/non-spam training folders on the Folders screen. Then just move messages into those folders as appropriate to train your bayes database.
For your personal bayes databases to be active, you have to train it with at least 200 spam messages and 200 non-spam messages. If you haven't trained enough messages, then we use a global continuously updated bayes database against your incoming messages, which helps detect spam/non-spam, but isn't as good as a personally trained one.
Pro Offers subdomain addressing
Instead of using plus addressing (e.g. foo+bar@email.com), FastMail offers the ability to receive mail through subdomain addresses (e.g. foo@bar.email.com).
Pro Integrated file storage
Fastmail allows saving attachments and other files into their own file storage system for easy retrieval later.
Pro Proper support for folders
FastMail has full support for folders, unlike Gmail where you only have labels.
Pro Intuitive default filters
Fastmail automatically filters your email into:
- All
- Unread
- Personal
- Notifications
- Mailing Lists
Pro Identities & aliases practically gives you a new email that you can manage from a single account
With identities and aliases, you can set up a completely new email address that can be managed from your account, without paying for more. As of time of this writing, FastMail offers up to 500 identities and 600 aliases per account, regardless of plan type.
Pro Multiple Signatures for Multiple Accounts including ALIASES
You can assign your default signature to an ALIAS for the same account or create an altogether new one.
Pro No personal data stored on servers
No access tokens, passwords, attachments or email itself is stored on Canary servers.
Pro Seamlessly integrates with iOS verion
Gone are the days of manual setup of phone email clients! Canary Mail syncs not just your accounts but all of your settings and even signatures on iCloud.
Pro Local email database is encrypted on disk
Canary stores your local email database encrypted.
Pro Gorgeous and intuitive
Pro Pretty Good Privacy or PGP built-in
Cons
Con Australian law enforcement
The company and all email hosted by then is subject to Australian laws requiring sharing with law enforcement. These provisions are weaker than those provided by European GDPR.
Con Lacks folder notifications on official mobile app
Con Expensive
The most popular domain registrars will provide you with both multiple email accounts and a domain name at a lower price than FastMail charges for only 1 email account.
Con Servers are located in the US
Con Not free
Con Missing mainstream features
No functionality for user-defined Gmail message-tagging, or moving/copying to IMAP folders. Might be acceptable in a free app, but not in one with premium pricing.
Con Buggy
It adds random pins to old emails which then stay on top of the inbox list
Con Poor handling of new emails
You sometimes need to wait very long before your email actually gets delivered.
Con Windows moves randomly
When you create a new email, the new windows is often misplaced so that you have to move it to reach the "Send" button.
Con Poor text editing capabilities
The cursor is laggy so you're better off using keyboard shortcuts.
Con Show NO show
It'll show a new email on a counter, but you're not able to view them.
