The 8 Best Aqua Mail Alternatives in 2026

Short answer: the closest free replacement for Aqua Mail on Android is FairEmail: open source, no ads, unlimited accounts and just as many settings to tweak. Thunderbird for Android is the simpler free pick. If you want the same app on your computer, or AI that writes and summarizes, look at Canary Mail (ours), Dove or Spark. For an Exchange or Microsoft 365 work account, the free Outlook app is the safe choice.

Disclosure: we make Canary Mail, and Dove comes from the same company. Both are in this list and marked as ours. Prices and features were checked on each vendor's site, Google Play or the App Store on October 16, 2026.

What is Aqua Mail, and why look for an alternative?

Aqua Mail is an email app for Android and iPhone with more than 5 million downloads on Google Play. It works with Gmail, Outlook.com, Yahoo, iCloud, Exchange, Microsoft 365 and any IMAP or POP3 account. It isn't a cloud-based client, so your passwords and messages stay on your phone, and it has hundreds of settings, home-screen widgets and Wear OS support.

The reasons people look elsewhere are mostly about the free version and the price:

• The free version shows ads, and Aqua's pricing page lists it as one account. Unlimited accounts, no ads, push for Exchange, S/MIME, filters and backups all need Premium.
• Premium is a subscription on Aqua's own site ($9.99 a month, or a one-time license that was $99.99 on sale in October 2026), and in-app prices on Google Play and the App Store can differ.
• There's no desktop app, so you need a second program on your computer.
• Aqua doesn't list AI writing or summaries among its features.

Aqua Mail alternatives compared

The 8 best Aqua Mail alternatives in 2026

1. FairEmail: Best like-for-like replacement on Android

FairEmail is what many Aqua users move to. It's open source, shows no ads, has no analytics, and keeps your data off third-party servers. It handles unlimited accounts and addresses, has a unified inbox, supports OpenPGP and S/MIME, and tries to block tracking images. Like Aqua, it has a lot of settings. Most features are free; Pro adds conveniences such as snooze, send later, filter rules, per-account notification sounds and a message list widget.

• Who it's for: privacy-minded Android users who liked Aqua's control but not its ads
• Price: free; Pro is a one-time purchase in Google Play
• Platforms: Android
• Downside: it looks plain and can feel technical, and it doesn't support Exchange ActiveSync, so Exchange servers have to offer IMAP.

2. Canary Mail: Best for AI and encryption on phone and computer

Disclosure: we make Canary Mail.

Canary works with Gmail, Outlook and Microsoft 365, Exchange, iCloud, Yahoo and any IMAP account, and gives you the same app on Android, iPhone, iPad, Mac and Windows, which Aqua can't. AI sorts your inbox on every plan, including the free one. The Growth plan adds AI writing and summaries, read receipts and send later, and Pro+ adds PGP encryption and phishing and impersonation detection. Tracker blocking is on by default, triage runs on your device, and your email isn't used to train AI. More than 2 million people use it.

• Who it's for: people who want one inbox across phone and computer, with AI
• Price: free for unlimited accounts on 2 devices; Growth $36/year; Pro+ $100/year; lifetime licenses $100 and $300
• Platforms: Android, iPhone, iPad, Mac, Windows
• Downside: AI writing and encryption are on paid plans, there's no monthly option, and the calendar isn't available on Android.

3. Thunderbird for Android: Best simple free app

Thunderbird for Android is the old K-9 Mail, rebuilt by the Thunderbird team (K-9 Mail is still on Google Play and gets the same updates). It's free, open source and funded by donations, connects straight to your provider, and has a unified inbox and OpenPGP encryption through the OpenKeychain app. It has far fewer settings than Aqua, which some people will like.

• Who it's for: people who want a clean, free app that doesn't track them
• Price: free
• Platforms: Android; Thunderbird desktop runs on Windows, Mac and Linux, and an iPhone app in public beta on TestFlight
• Downside: no calendar and no Exchange ActiveSync, and fewer power-user options than Aqua or FairEmail.

4. Microsoft Outlook: Best for Exchange and Microsoft 365

If you used Aqua mainly for a work Exchange or Microsoft 365 account, Outlook is the app your IT team expects. It's free, has a built-in calendar and Focused Inbox, and also adds Gmail, Yahoo, iCloud and IMAP accounts.

• Who it's for: anyone whose main account is Exchange or Microsoft 365
• Price: free with ads; Microsoft 365 plans remove ads for Outlook.com addresses
• Platforms: Android, iPhone, Windows, Mac, web
• Downside: non-Microsoft accounts sync through Microsoft's cloud, so a copy of that mail sits on Microsoft's servers, and the free version shows ads.

5. Gmail: Best zero-setup option

Gmail is already on almost every Android phone. Besides Google accounts, it can add Outlook, Yahoo, iCloud and other IMAP accounts, and it has an All inboxes view. It's the easy answer if you only want something free that works.

• Who it's for: people with mostly Google accounts who don't need many settings
• Price: free; Google One adds storage
• Platforms: Android, iPhone, web
• Downside: non-Google accounts don't get Gmail's categories or spam filtering, personal accounts show ads in Promotions and Social, and there are few ways to customize it.

6. BlueMail: Best free app on every platform

BlueMail runs on Android, iPhone, Mac, Windows and Linux. The free Personal plan has unlimited accounts, no ads, a unified inbox, Clusters that group mail by sender, and PGP encryption. Plus adds GemAI, its AI writing and summary tool.

• Who it's for: people who want one free app on phone and computer, Linux included
• Price: free; paid Plus plan
• Platforms: Android, iPhone, Mac, Windows, Linux
• Downside: the interface is busy, and AI needs Plus.

More: BlueMail alternatives.

7. Dove: Best AI-first inbox

Dove is made by the team behind Canary Mail. It sorts your mail into what needs you and what can wait, gives you a daily summary, and lets you ask questions about your inbox in plain language. It works with Gmail, Microsoft and IMAP accounts.

• Who it's for: people who want AI to do most of the sorting and drafting
• Price: free with 10 AI actions a day; Pro $20/month or $200/year
• Platforms: Android, iPhone, Mac, Windows, web
• Downside: it's new, the free plan's AI is capped at 10 actions a day, and it has none of Aqua's deep settings.

8. Spark: Best for a sorted inbox and small teams

Spark's Smart Inbox puts mail from people above newsletters and notifications, and its Gatekeeper lets you approve new senders. Paid plans add AI writing and team features like shared drafts and comments.

• Who it's for: people who want a sorted inbox on phone and computer, and small teams
• Price: free for unlimited accounts; Plus $10/month or $99/year; Pro $20/month or $199/year, per user
• Platforms: Android, iPhone, iPad, Mac, Windows
• Downside: some mail is processed on Readdle's servers, and AI is on paid plans.

More: Canary Mail vs Spark and Spark alternatives.

Or switch to an encrypted email service

Apps like Aqua read the email address you already have. If what you really want is end-to-end encryption by default, you need a different email service. Proton Mail is the best known: the free plan has 1 GB and one address, and Mail Plus is $4.99 a month or $3.99 a month billed yearly. Its app only opens Proton accounts, though. See our Proton Mail alternatives and the best secure email apps.

Also worth a look

• Samsung Email: preinstalled on Galaxy phones, free, with Exchange ActiveSync and S/MIME.
• Nine: an Exchange-focused app with a one-time $14.99 license. See our Nine alternatives.

How to switch from Aqua Mail

If your accounts use IMAP or Exchange, your mail lives on your provider's server, not in Aqua, so you just add the same accounts to the new app. Two things don't move on their own: signatures (copy them over by hand) and anything you set up only in Aqua, such as rules or local folders. If any account uses POP3, which downloads mail to the phone, back it up with Aqua's backup feature or switch the account to IMAP before you uninstall. For more picks, see the best email apps for Android.

Frequently asked questions

What is the best alternative to Aqua Mail?

For a free, private app with as many settings, FairEmail. For a simpler free app, Thunderbird for Android. If you want the same app on your computer with AI, Canary Mail (ours) or Spark. For a work Exchange account, Outlook.

Is Aqua Mail safe to use?

Yes. Aqua Mail isn't cloud-based: it doesn't store your passwords or messages on its servers, uses OAuth sign-in for Gmail, Outlook and Yahoo, and checks DKIM and SPF. End-to-end encryption (S/MIME) needs Premium.

Is Aqua Mail free?

There's a free version with ads. Unlimited accounts, no ads, push for Exchange and S/MIME need Premium, which Aqua's site sells monthly or as a one-time license.

Is Aqua Mail on iPhone?

Yes. Aqua Mail has an iPhone app on the App Store, updated in September 2026, though its Android app is the older and more complete one.

Is there an open-source alternative to Aqua Mail?

Yes: FairEmail and Thunderbird for Android (the former K-9 Mail) are both open source and free.

What is the most secure email app for Android?

For your existing address, FairEmail, Thunderbird for Android and Canary Mail (PGP on Pro+) all connect directly to your provider and support encryption. For encryption by default, use an encrypted service such as Proton Mail.

Sources

• Aqua Mail
• Aqua Mail pricing
• Aqua Mail on Google Play
• Aqua Mail on the App Store
• FairEmail
• Thunderbird for Android
• K-9 Mail on Google Play
• Microsoft: sync your account to the Microsoft Cloud
• Google: add other email accounts to Gmail
• BlueMail pricing
• Dove pricing
• Spark pricing
• Proton Mail pricing
• Canary Mail pricing