Mail-in-a-Box alternatives · Email
Alternatives to Mail-in-a-Box with a one-time purchase
The Mail-in-a-Box listing shows no one-time purchase. 7 of the 125 other email apps in this directory can be bought with a one-time purchase.
Mail-in-a-Box is free to use. 6 of them are free or have a free plan.
7 tools · Listings checked up to Nov 13, 2026 · Where the facts come from
How each one differs from Mail-in-a-Box
- Free plan · from $36/yr
Canary Mail
AI email client with PGP encryption for Mac, iOS, Windows, Android
- Canary Mail starts at $36 per year (Growth), shown as $3 per month billed yearly. Mail-in-a-Box is free.
- Only Canary Mail lists macOS, iOS, Windows and Android apps.
- Only Mail-in-a-Box lists a web app.
- Canary Mail is end-to-end encrypted, according to its own site.
- Free plan · from $49.95/yr
eM Client
Desktop email client for Windows and Mac with calendar and chat
- eM Client starts at $49.95 per year (Personal subscription, up to 3 devices). Mail-in-a-Box is free.
- Only eM Client lists Windows, macOS, iOS and Android apps.
- Only Mail-in-a-Box lists a web app.
- eM Client can be bought with a one-time purchase.
- Free plan · from $7.49 one-time
FairEmail
Open source, privacy-oriented email client for Android
- FairEmail starts at $7.49 one-time (pro features, US Google Play in-app purchase). Mail-in-a-Box is free.
- Only FairEmail lists an Android app.
- Only Mail-in-a-Box lists a web app.
- FairEmail is end-to-end encrypted, according to its own site.
- Free trial · from $14.99 one-time
Nine
Exchange ActiveSync email, calendar and tasks app for phones
- Nine starts at $14.99 one-time license. Mail-in-a-Box is free.
- Mail-in-a-Box has a free plan. Nine does not, though it has a free trial.
- Only Nine lists Android and iOS apps.
- Only Mail-in-a-Box lists a web app.
- Free plan · from $34.49/yr
Mailbird
Desktop email client for Windows and Mac with a unified inbox
- Mailbird starts at $34.49 per year (Premium Yearly Plan, US Mac App Store in-app price). Mail-in-a-Box is free.
- Only Mailbird lists Windows and macOS apps.
- Only Mail-in-a-Box lists a web app.
- Mailbird can be bought with a one-time purchase.
- Free plan · from $7.99/mo
Airmail
Customizable email client for iPhone, iPad and Mac
- Airmail starts at $7.99 per month, or $39.99 per year (US App Store in-app prices). Mail-in-a-Box is free.
- Only Airmail lists macOS and iOS apps.
- Only Mail-in-a-Box lists a web app.
- Airmail can be bought with a one-time purchase.
- Free plan · from $9.99/mo
Aqua Mail
Email app for Android and iOS that handles many accounts at once
- Aqua Mail starts at $9.99 per month (Premium). Mail-in-a-Box is free.
- Only Aqua Mail lists iOS and Android apps.
- Only Mail-in-a-Box lists a web app.
- Aqua Mail can be bought with a one-time purchase.
Common questions
Is there an alternative to Mail-in-a-Box that you buy once?
Yes. Canary Mail, eM Client, FairEmail, Nine, Mailbird, Airmail and Aqua Mail can be bought with a one-time purchase.
Can you buy Mail-in-a-Box once instead of subscribing?
The Mail-in-a-Box listing shows no one-time purchase. The listing was checked on Nov 13, 2026 against the pages it cites.
Which of these email apps are free?
Canary Mail, eM Client, FairEmail, Mailbird, Airmail and Aqua Mail are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Mail-in-a-Box: the alternatives its listing names first, then the tools that share the most features with it.