10 Best Apple Mail Alternatives for Mac and iPhone in 2026

The best Apple Mail alternative depends on why you're leaving. Spark is the strongest all-rounder for Mac and iPhone, free Microsoft Outlook suits anyone on Microsoft 365 or Exchange, Mimestream is the best Mac app for Gmail, Canary Mail adds PGP encryption, and Proton Mail or HEY replace the email service itself.

Apple Mail is free, already on every Mac and iPhone, and fine for a lot of people. The itch to switch usually starts with something small: search that misses the message you know is there, newsletters crowding out people, a work Exchange account that behaves oddly, or a Gmail inbox whose labels never quite map to Mail's folders. Below are ten apps worth installing instead, what each costs today, the one reason to pick it, and how to move over without losing a single message.

Apple Mail alternatives compared

Here are the ten picks side by side. Prices are the vendors' own US list prices, checked in October 2026.

Should you leave Apple Mail at all?

Leave Apple Mail only if it's failing at a job you do every day. Apple Mail costs nothing, syncs your iCloud, Gmail, Exchange and IMAP accounts, and has one of the best privacy features of any mail app: Protect Mail Activity, which hides your IP address and loads remote content privately so senders can't see when you opened their message. Apple's Mail guide puts it under Mail > Settings > Privacy.

The good reasons to switch are specific: you live in Gmail and want its labels, categories and filters to behave natively; your company runs Microsoft 365 and you want the calendar, rooms and shared mailboxes in one place; you want templates, rules you can build without a manual, or newsletters sorted away from people automatically; or you want encryption or a different email provider altogether. If none of those is you, read the Gmail vs. Apple Mail comparison before you install anything.

When I run a work Gmail and a personal iCloud address side by side, the thing I notice first in any mail app isn't AI. It's how quickly I can tell which account a message landed in, and whether a reply goes out from the right one. Check that in the first ten minutes with any app below.

The 10 best Apple Mail alternatives in 2026

1. Spark: the best all-rounder for Mac and iPhone

Spark is the app to try first if you just want a better Apple Mail. Spark's site says it works with Google, iCloud, Outlook, Exchange, Yahoo and IMAP accounts, and it sorts newsletters and notifications into their own inboxes so people's mail stands out. It runs on Mac, iPhone, Windows and Android, and one subscription covers every device.

Spark's pricing page keeps unlimited accounts on the Free tier and charges $99 a year for Plus ($10 monthly) and $199 a year for Pro ($20 monthly). Plus adds Spark +AI, the AI Assistant, templates and 40 AI meeting notes a month; Pro adds Autopilot, auto-drafts and read statuses. The AI features draw on a monthly quota the page doesn't put a number on, and Spark +AI is off by default.

The trade-off is where your mail goes. Spark's privacy policy says email is mainly processed on your device but recent messages sit on its servers for four hours, Send Later messages stay until they're sent, and AI inputs may go to outside AI providers. If that's a deal-breaker, the Spark alternatives page covers what to use instead.

2. Microsoft Outlook: free, and the right call for Microsoft 365

Microsoft Outlook is the alternative to pick if your work email runs on Microsoft 365 or Exchange. Outlook for Mac is free from the Mac App Store and, per its App Store listing, works with Microsoft 365, Outlook.com, Gmail, Yahoo Mail, iCloud, IMAP and POP accounts. It needs macOS 14 or later.

The free version shows ads. Microsoft 365 Basic removes them for $19.99 a year ($1.99 monthly) and adds 100 GB of mailbox and cloud storage; Personal is $99.99 a year and Family $129.99, per Microsoft's plan comparison. Outlook earns its place when the calendar and contacts come from the same Microsoft 365 account, so I'd use it for the work address and wouldn't move a personal iCloud inbox into it just for consistency.

3. Canary Mail: encryption and AI for little money

Canary Mail costs less than most paid picks here and still bundles AI writing help with PGP encryption, on both Mac and iPhone. Canary's site lists support for iCloud, Google, Outlook, Exchange, Yahoo, Zoho Mail and Proton Mail, with apps for Mac, iPhone, iPad, Windows and Android.

Canary is free for unlimited accounts on two devices, per its pricing page. Above that sit Growth at $36 a year with its AI Copilot, and Pro+ at $100 a year with PGP encryption, SecureSend and phishing and impersonation checks. Billing is yearly only, and a seven-day trial needs no card. Canary's FAQ promises it won't train AI on your messages, and you can turn the AI features off entirely.

4. Airmail: for people who like to automate

Airmail is the pick for Mac users who want rules, custom actions and Siri Shortcuts on their email. Airmail's site lists Gmail, iCloud, Exchange, Office 365, Outlook, IMAP and POP3, a Smart Inbox, snooze, send later, tracker blocking and iCloud sync of settings, signatures and templates between Mac and iPhone.

The app is free to download. On the Mac App Store, Airmail Pro is $7.99 a month or $49.99 a year and needs macOS 14.6 or later; the iPhone listing shows Pro at $7.99 a month or $39.99 a year. Check which store you subscribe through, since the yearly prices differ.

5. Mimestream: the best Mac app for Gmail

Mimestream is a native Mac app built only for Gmail, and it's the one to choose if Gmail's labels, categories, filters and aliases are how you work. Mimestream's site says it connects through the Gmail API, so inbox categories, labels and server-side filters work the way they do in Gmail itself, and your data is stored on your Mac with a direct connection to Google.

Mimestream's pricing is $4.99 a month or $49.99 a year for all your Google accounts on up to five devices, with a 14-day trial and no card. It needs macOS 12 or later. It's Mac first: the homepage mentions an iPhone and iPad version in beta, so on the phone you may still be using the Gmail app for now. It also won't touch your iCloud or Outlook accounts, which is the whole point and the whole catch.

6. Superhuman: speed, at a price

Superhuman is the premium choice for people whose whole day runs through email. Superhuman's announcement says it works with Gmail and Outlook accounts on Mac, Windows, the web, iPhone and Android. Those are the only two providers it names, so an iCloud address won't come along.

The cost is the hurdle. Superhuman's plans page now bundles the mail app with Grammarly and other tools, and Mail only comes with Business: $33 per member monthly on annual billing, or $40 paid month to month. The Free and Pro plans leave Mail out. That's more than ten times what Canary's Growth plan costs, so I'd only pay it if email speed is genuinely the bottleneck in your day. The Superhuman alternatives page has cheaper options with a similar feel.

7. MailMate: keyboard control and Markdown

MailMate is a Mac-only IMAP client for people who'd rather write email in Markdown than fight a rich-text toolbar. MailMate's site lists extensive keyboard control, smart mailboxes, advanced search, and OpenPGP and S/MIME signing and encryption.

MailMate's pricing is $10 every three months. The trial has no feature limits; after 14 days of use it asks you to choose a mode. If a subscription ends it drops to Free Mode, which keeps every feature but adds a "MailMate Free Mode" header to outgoing mail, and businesses that rely on it are expected to pay. There's no iPhone app, so pair it with Apple Mail on the phone.

8. Thunderbird: free and open source on the Mac

Thunderbird is the free, open-source choice, funded by donations and part of the Mozilla family. Thunderbird's site offers a macOS download with a unified inbox, filters, separate account management, and calendars and contacts in the same app.

There's no Thunderbird for iPhone yet. The Thunderbird team's October 2026 first look says the iOS app is still in development, with a first version for community testing planned "in the next few months". For now it's a Mac-only answer.

9. Proton Mail: replace the service, not just the app

Proton Mail is a different kind of alternative: an encrypted email service with its own apps, not a new window onto your Gmail or iCloud. Choose it if what bothers you is who can read your mail, not how the app looks.

Proton's pricing page gives free users one address and 500 MB of storage (1 GB after a getting-started checklist); Mail Plus costs $47.88 a year and Proton Unlimited $119.88. The iPhone app works on any plan; the Mac desktop app needs a paid plan, with a 14-day trial for free users, and macOS 12 or later, per Proton's support page. If you'd rather keep Apple Mail as the app, Proton Mail Bridge connects a paid Proton account to Apple Mail over IMAP.

10. HEY: a new address with its own rules

HEY, made by 37signals, rethinks the inbox: mail from a new sender lands in The Screener first, and you decide whether that person can reach you at all, per HEY's homepage. It's an email service with its own @hey.com address, with apps for Mac (Apple Silicon and Intel), iPhone, Windows, Android and Linux, per HEY's apps page.

HEY's pricing is $99 a year for a personal account after a 30-day free trial. HEY for Domains, on your own domain, runs $12 for each user monthly. Bringing Gmail along means forwarding: HEY's Gmail guide says it can't import your old Gmail messages, so your history stays in Gmail or a Takeout export.

Which Apple Mail alternative should you pick?

Match the app to the reason you're leaving, not to the longest feature list.

• You want Apple Mail, but better: Spark, or Airmail if you like building rules.
• Your work is on Microsoft 365 or Exchange: Microsoft Outlook, free on the Mac.
• You live in Gmail: Mimestream on the Mac; Superhuman if speed is worth $33 a month.
• You want encryption without changing providers: Canary Mail Pro+, or MailMate with PGP.
• You want to pay nothing and own the software: Thunderbird on the Mac.
• You want a new, private address: Proton Mail, or HEY for a different inbox philosophy.

A mistake I've made myself: switching apps to fix a problem that was really the inbox. When my mail was overwhelming, a new client helped for a week, then the same newsletters piled up in nicer typography. Unsubscribing and archiving fixed more than the switch did.

How to switch from Apple Mail without losing anything

Switching apps doesn't move or delete your email when your accounts are iCloud, Gmail, Exchange or IMAP, because the messages live on the mail server and the new app just reads them. The two things that can get lost are local mailboxes and the default-app setting.

On a Mac

1. In Apple Mail's sidebar, look for an On My Mac section. Those mailboxes exist only on this Mac, so a new app won't see them.
2. Select each one, then choose Mailbox > Export Mailbox, pick a folder and click Choose. Mail saves each as an .mbox file, per Apple's export guide.
3. Install the new app and add your accounts. Sign in with the provider's own sign-in screen where offered, rather than an app-specific password.
4. To make links like mailto: open the new app, open Apple Mail, choose Mail > Settings, click General, and pick your app from Default email reader. Apple's support article notes Mail needs at least one account set up to show this setting.
5. Leave Apple Mail installed for a couple of weeks before removing its accounts, in case a signature, rule or smart mailbox needs recreating.

On iPhone

1. Install the new app from the App Store and sign in to each account.
2. Open Settings, tap Apps, then Default Apps at the top.
3. Tap Email and choose the new app. Apple's guide asks for the latest iOS; if the Email option or your app is missing, update the iPhone first.

When I switch, I keep a short note of every Apple Mail rule and signature before I touch anything. Rules don't travel between apps, and the one I forget is always the one filtering receipts.

When to stay with Apple Mail

Stay with Apple Mail if your accounts are mostly iCloud, you value Apple's privacy protections, and your complaints are about volume rather than features. Protect Mail Activity already blocks the tracking most people worry about, and a lot of what the paid apps sell, speed and organization, you can partly get by tidying the inbox you already have. Encryption is the exception: for that, look at Canary Mail Pro+, MailMate or Proton Mail.

Apple Mail is also the safe choice on the iPhone even if you change apps on the Mac. Several picks here, MailMate, Thunderbird and, for now, Mimestream, have no finished iPhone app, so a mixed setup is normal.

Keep your mail app and add an assistant

Sometimes the real wish isn't a new mail app but help with the email itself: drafting the awkward reply, finding the thread from March, remembering who's waiting on you. Merlin, an assistant for the Mac, does that work next to whatever mail app you keep. It works with Gmail accounts: connect yours and ask in plain words, "what did the landlord say about the deposit?" or "draft a reply turning down Thursday", and Merlin searches every connected account at once.

Press ⌥Space over Apple Mail, Spark or any other app and Merlin opens on top with the text you highlighted. Replies it writes for you show up as a draft to edit in Merlin's chat, and they only leave once you press approve.