
Airmail
GyazMail
Mailspring
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Canary Mail
Spark Mail
MailMate is an alternative email client that was designed for the macOS.

NiftyImages
OpenAlternative
MailChimp
Postmark
Movable Ink
Momen
Brevo
Real-time, open-time content for email: countdown timers, dynamic images, live product picks, geo-targeted maps, one-click surveys, and scratch-card rewards. No code, no ESP integration, rendered fresh every time someone opens.
Which is more popular?
Based on our record, MailMate seems to be more popular. It has been mentioned 27 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | freron.com | alterable.com |
| Pricing | — | |
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| Company | — | Startup from the United States · 1 - 9 employees |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of MailMate yet.
Alterable adds real-time, open-time content to email campaigns, no coding, no ESP integration, no resends. Every asset is a single image URL that renders fresh the moment a subscriber opens the message, not the moment you hit send. Countdown timers count down live in the inbox. Choose a fixed...
What each product offers, as listed by its team.


Possible disadvantages
Walkthroughs and reviews on video.
My Favorite Things about MailMate
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing MailMate and Alterable.
Alterable's answer:
Most tools in this space (NiftyImages, Sendtric, MotionMail, CountdownMail) do one thing well, usually just countdown timers. Alterable is a single platform for six distinct open-time content types, timers, dynamic images, live product data, geo-targeted maps, surveys, and scratch-card rewards, all rendered the same way: one image tag, no ESP integration, no JavaScript.
That "just an image" approach is also what makes it universal: it works in every major email client without exception, since there's nothing for Outlook or Gmail to selectively support or block.
The rules engine is shared across all six content types too. The same conditions (location, weather, device, time of day, stock level) that pick a dynamic image can pick a product, a map location, or a timer variant, so teams build a targeting logic once and reuse it everywhere instead of learning a separate tool per feature.
Alterable's answer:
Against single-purpose timer tools (Sendtric, CountdownMail, MotionMail, CountingDownTo): those platforms do one thing, a countdown widget. Alterable includes countdown timers plus dynamic images, live product data, geo-targeted maps, surveys, and scratch cards, on one account, with one shared rules engine. If a team outgrows "just a timer," there's no second tool to adopt.
Against broader personalization platforms (NiftyImages, Movable Ink): Alterable is free to start with no credit card, and every asset is a plain image tag rather than requiring a native ESP integration or account connection. That keeps setup to minutes and means it works identically across Klaviyo, Mailchimp, HubSpot, GetResponse, or any of 50+ platforms, with no per-ESP configuration to maintain.
Because it's "just an image": there's no JavaScript, no AMP, no interactive-email fallback logic to write or test. It renders the same way in Outlook as it does in Gmail, which is where more elaborate interactive approaches usually break first.
Share your experience with using MailMate and Alterable. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Mailmate is an influential email client for Mac and is one of the best email clients for Mac. With Mailmate, simple emails can be sent.
Mailmate is One of the finest Email Clients for Mac, as it is an influential email client. It enables to send of plain and simple emails. Here the email headers can be clicked easily. Just by clicking on a particular...
MailMate is an even geekier app for users who really like to get under the hood. It chooses function over style, power over ease-of-use, and is optimized for keyboard use. In The Best Email Client for Mac, we found it...
We have no reviews of Alterable yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


If anyone wants a great mail client, I highly recommend Mailmate which among other things lets you write messages in markdown: https://freron.com/ it’s maintained by a solo dev for 15+ years and charges a fair price. - Source: Hacker News / about 2 months ago
If you want a Mac email program that renders Markdown, definitely checkout MailMate[1]. Indie developer, has already shipped a lot of updates this year. [1]: https://freron.com. - Source: Hacker News / over 1 year ago
I used MailMate (https://freron.com/) before and I liked it. Very customizable and the search functionality is better than Apple Mail or Outlook. Has some tool extensions to allow it to interact with some other apps. It does not have a... - Source: Hacker News / over 1 year ago
Tracking Alterable since Feb 2022.
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