Honest comparison
Airmail Alternative: A Unified Inbox in the Browser, on Any Operating System
Connect every mailbox you own to one board, in the browser, and let AI read each message to categorize it and flag spam before you open it.
Any IMAP provider · AI category + spam per message · Archiving synced back
In short
Airmail runs only on Apple hardware: macOS, iPhone, iPad, Apple Watch and Vision Pro. There is no Windows build, no Linux build, no Android app and no browser version, so the moment one of the machines you work from is not an Apple machine, Airmail cannot follow you there. On price it beats us outright: one account costs nothing, and Airmail Pro is listed at 9 dollars a month or 49 dollars a year against our 29 dollars a month for five mailboxes. Inboxes is a browser board rather than an installed app, so the same unified inbox opens on a PC, a Mac, a Chromebook or a phone browser, and an AI model reads every message arriving at every connected mailbox to give it a category and a spam verdict before you see it. Buy Airmail if you live entirely inside Apple and want a fast, deeply configurable native client. Choose Inboxes if your mail has to reach you on whatever machine you happen to be sitting at, already sorted.
The difference
Where Inboxes and Airmail actually diverge
Airmail has a devoted following and the reasons hold up. It is quick, it has a real unified inbox that merges every account and lets you leave individual accounts out of the merged view, and it is one of the most configurable mail clients on the Mac: custom actions, themes, plugins, and send-to integrations with the task and note apps people keep open next to email. It also reaches further into old corporate mail than most modern AI clients do, because its own FAQ lists IMAP, POP3 and Exchange 2007 and later as supported. Airmail for Business is sold as a one-time purchase with volume licensing and mobile device management rather than a subscription, which is rare and genuinely useful for a school or a company that hates renewals. Two things send people looking for an alternative. The first is the platform wall, and it is absolute: Airmail is Apple software and nothing else. If you carry a work PC and a personal Mac, or your company issued you a Chromebook, half of your week has no Airmail in it and no amount of paying fixes that. The second is that Airmail sorts nothing for you. Everything it does to an arriving message comes from a rule you wrote or an integration you wired, and configurability that deep is a project rather than a setting, which is the common complaint even from people who like the app. Inboxes goes the other way on both counts. It is a web app, so the board lives at a URL and opens on any operating system with nothing installed and nothing to keep updated. And the triage happens without you: every message arriving at any connected mailbox is read by an AI model that assigns a category (work, personal, receipts, newsletters, notifications), decides whether it is spam, and drafts a reply to anything it marks important for you to approve before it sends.
Side by side
Inboxes vs Airmail
| Capability | Inboxes | Airmail |
|---|---|---|
| Unified inbox across multiple accounts | Yes | Yes |
| Works in any browser, nothing to install | Yes | Apple software only |
| Runs on Windows, Linux and ChromeOS | Yes | No |
| iPhone, iPad and Apple Watch apps | No | Yes |
| AI categorizes every message automatically | Yes | Rules, filters and integrations you configure |
| AI spam verdict on top of the provider filter | Yes | Relies on the provider spam filter |
| AI drafts a reply you approve before sending | Yes | Templates and custom actions |
| Any IMAP mailbox (Gmail, iCloud, Yahoo, own domain) | Yes | Yes |
| Exchange and Office 365 mailboxes | No | Yes |
| Offline access and a local mail archive | No | Yes |
| Billing model | Per account, not per seat: $29/mo covers five mailboxes | Per user subscription, one account on the no-cost tier |
| Entry price | $29/mo flat | Free tier for 1 account, Pro $9/mo or $49/year |
Pricing and features verified from each vendor's public pricing page in August 2026, and quoted in the currency the vendor publishes. Both products change, so check the current page before you buy.
// Where Airmail wins
Airmail is the better buy for a lot of people and it deserves to be said plainly. If every device you touch is made by Apple, Airmail costs a fraction of what we do: one account carries no charge at all, and Pro is listed at 9 dollars a month or 49 dollars a year against our 29. It is native, so it is faster than a browser tab, it works offline, and it keeps a local archive, none of which we can match. It puts your mail on an iPhone, an iPad and an Apple Watch, where we have no app at all. It connects Exchange and Office 365 mailboxes, which we cannot: Inboxes authenticates with an app password, and Microsoft has retired basic authentication for Exchange Online, so a managed work mailbox will not connect to us at any price. Its integrations with task managers and note apps are a real workflow feature we do not offer, and the Airmail for Business one-time license is a better deal than any subscription if you are buying for a team that plans to keep the software for years. Choose Inboxes only when the specific thing you need is one sorted board across many providers, reachable from any machine.
FAQ
Questions people ask before switching
What is the best Airmail alternative?
It depends on which limit pushed you off it. If the problem is that Airmail only runs on Apple hardware, the answer has to be either a cross-platform desktop client or a browser one: eM Client and Thunderbird cover Windows and Mac, Thunderbird adds Linux, and Inboxes runs in any browser on any operating system with AI sorting every message. If you are staying on the Mac and just want something simpler to set up, Apple Mail is already installed and merges accounts properly.
Is Airmail free?
Airmail has a tier that costs nothing and is limited to one email account, which defeats the point if you are trying to bring several addresses together. Airmail Pro unlocks the rest and its own FAQ lists 9 dollars a month or 49 dollars a year, noting that the price varies by country and by promotion. Airmail for Business is sold separately as a one-time purchase rather than a subscription. Prices checked August 2026.
Does Airmail work on Windows?
No. Airmail is published for macOS, iOS, iPadOS, Apple Watch and Vision Pro only. There is no Windows version, no Linux version, no Android app and no web version, and Airmail has never shipped one. If you need the same inbox on a Windows machine, your options are a cross-platform client such as eM Client or Thunderbird, or a browser-based one such as Inboxes, which needs no install on any operating system.
How many email accounts can Airmail connect?
The tier that costs nothing holds one account. Airmail Pro removes that limit and connects accounts of any type it supports, including Gmail, iCloud, Exchange, Office 365, and any mailbox reachable over IMAP or POP3, with a unified inbox across them and the option to exclude individual accounts from the merged view. So the account limit is really a pricing question rather than a technical one.
Does Airmail have AI that sorts my email?
Not in the sense of a model reading each message and filing it. Airmail gives you rules, filters, custom actions and integrations, which are powerful but are exactly as good as the effort you keep putting into them. Inboxes takes the other approach: an AI model reads every message as it arrives at any connected mailbox, assigns it a category, gives it a spam verdict, and drafts a reply to the important ones for you to approve.
How do I cancel an Airmail subscription?
Airmail is distributed through the App Store and the Mac App Store, so an Airmail Pro subscription is an Apple subscription and is cancelled through Apple rather than through Airmail. On an iPhone or iPad that is Settings, your Apple Account, then Subscriptions; on a Mac it is the App Store account page. Cancelling stops the renewal and leaves access running until the paid period ends.
Is there an Airmail alternative for Linux?
Yes, though not many. Thunderbird is the mature Linux answer and merges every IMAP account into Unified Folders at no license cost. Evolution ships as the default on GNOME desktops including Fedora Workstation, and KMail comes with KDE Plasma. None of them sort mail with AI. Inboxes covers Linux the same way it covers every other platform, by running in the browser, so there is nothing to package or install.
Keep comparing
More on running every mailbox from one place
Put every mailbox on one sorted board
Connect your accounts over IMAP and let the AI categorize and de-spam your mail from the first message.