Spark vs Airmail on Mac: Two Long-Running Third-Party Clients

Spark vs Airmail on Mac is one of the oldest live questions in third-party email, and both answers are still shipping in 2026. Spark, from Readdle, is the broader product: six platforms, a long task-app integration list, and a team layer. Airmail, from Bloop, is the narrower and more opinionated one: Apple devices only, local-first processing, and customisation that goes deeper than anything Spark exposes.

This compares them on the five things that change your day: how each triages, how each hands an email to a task app, how far each bends to your workflow, how they sync, and what shape the money takes. Everything below was checked against each vendor's own live pages on 23 September 2026.

The verdict up front#

Spark is the better default. Its triage model does more work before you touch anything, its integration list covers the task apps most people actually use, and it is the only one of the two that handles shared inboxes and delegation. If you ever use a Windows machine or an Android phone, the decision is already made for you, because Airmail does not exist there.

Airmail wins on two dimensions, and they are not small ones. Its Custom Actions let you chain several steps into a single click in a way Spark has no equivalent for. And its processing is local by default, where Spark routes several core features through its own servers on Google Cloud. If either of those is the thing you care about, Airmail is the correct choice and Spark is not.

• Pick Spark if you want less manual sorting, a long list of task-app handoffs, team email, or any non-Apple device in the mix.
• Pick Airmail if you are Apple-only, want mail processed on your own machine, and will actually build custom actions rather than just admiring that they exist.
• Pick neither if you want a lean native AppKit client with a full offline archive. That is a different category.

Spark vs Airmail on Mac at a glance#

Where Spark wins: it does more before you touch anything#

Spark's triage is opinionated in a way Airmail's is not. Smart Inbox sorts arriving mail into personal, newsletter and notification groups, so mail from actual humans floats to the top without you writing a rule. Gatekeeper screens unknown senders and lets you accept or block before their mail lands. Group by Sender bundles everything from one source into a single row.

Airmail has a Smart Inbox too, plus rules, VIP flags and notification windows. The difference is who does the work. Airmail gives you good tools and expects you to configure them; Spark ships a default sort that is useful on day one.

For a high-volume inbox that is mostly newsletters, receipts and app notifications with a thin layer of real correspondence underneath, Spark's defaults save more time than Airmail's flexibility does. That is the most common Mac inbox shape, which is why Spark is the default recommendation here.

Spark vs Airmail integrations with task apps#

This is Spark's clearest lead and it is not close. Spark names around two dozen third-party targets on its integrations page and, importantly, tells you which platforms each one works on. Todoist, Things, OmniFocus, Asana, Trello, Notion, Evernote, TickTick, MeisterTask, OneNote, Bear, Agenda, 2Do, Apple Reminders and Slack are all there, with the cross-platform ones marked as working on Windows and Android as well as Mac and iOS.

Airmail's send-to list works well but reads like a list assembled a while ago. OmniFocus, Things, Todoist, 2Do, Fantastical, BusyCal, Evernote, Apple Reminders and Calendar are the Mac entries; iOS adds Trello, Drafts, Pocket and DEVONthink. Asana, Notion, Bear and Google Tasks appear nowhere on Airmail's pages, and the list still names Wunderlist and Clear, both long gone.

Both use the same mechanism: an email becomes a task or a note in the target app, one direction only. Neither is a two-way sync, so completing the task will not archive the mail. Airmail's advantage is that the send-to can be bound to a swipe or folded into a Custom Action, making the handoff one gesture rather than a menu dive.

Spark is the only one of the two with team email#

If more than one person touches an address, Spark is the answer by default. It offers shared inboxes for addresses like support@ or info@, shared drafts two people can edit at once, private comments threaded under a message, assignment with deadlines and status, and shareable links to a thread so you stop forwarding.

Airmail has none of this. It is a single-user client and does not pretend otherwise. The separate Airmail for Business app adds managed configuration and unlocks Pro features without a subscription, but it is a deployment story, not a collaboration one.

That is a category difference rather than a feature gap. If you are a team of one, ignore this section: it is much of what Spark charges for and you will not use it.

Where Airmail wins: Custom Actions and local processing#

Airmail's Custom Actions are the deepest customisation either app offers. You define a sequence once, apply a label, forward to a person, then archive, and it becomes one click or one swipe. Spark has swipe actions and a Command Center for keyboard-driven commands, but it has no way to bundle several distinct operations into a single named action.

Around that sits a set of hooks Spark does not expose on macOS: AppleScript, Siri Shortcuts for send and search, Touch Bar actions, and a plugin system adding read receipts, S/MIME and GPG. If you automate your Mac with Shortcuts or scripts, Airmail is addressable and Spark is not.

It also localises into more than thirty languages and lets you restyle almost everything: themes, minimal versus extended layouts, per-account colours and notification sounds. None of that changes what email is, but it is why people who like Airmail like it a lot.

Which Mac email app is more customisable? Airmail, clearly#

Spark is customisable in the sense that you can rearrange what it already decided. Airmail is customisable in the sense that you can define new behaviour. The second is rarer, and it is Airmail's whole argument.

The honest caveat: depth only pays off if you use it. An Airmail install left on defaults is a slightly less automatic Spark. The people who get the most from it spend an hour building three Custom Actions that match how they work, then never think about it again.

Where the mail is processed, and why it matters#

Airmail's Privacy Mode processes data locally, blocks tracking pixels and stops automatic image loading. The vendor states it does not store your messages on its servers, and that server-side processing only happens if you switch on Realtime Mailbox Monitoring.

Spark is explicit that several features need its servers, which run on Google Cloud: teams, shared emails and comments, shared drafts, shared links, delegation, templates and Send Later are all named as server-side. For push notifications it syncs the subject and part of the body, encrypts it, stores it, and says that copy is deleted four hours after the notification is sent. Message bodies stay with your provider.

Neither model is wrong. Spark's server layer is what makes teams and scheduled sends work across six platforms; Airmail's local-first design is what makes it defensible to someone who wants no third party in the path. Both do declare analytics tied to identifiers in their App Store privacy labels, so neither is a zero-telemetry product.

Is Airmail still maintained?#

Yes, and the confusion is understandable. Checked on 23 September 2026, the iOS app was at build 27.0.2 released within the past week, with substantive release notes about smart reply, search indexing for large mailboxes and background sync. iOS 27 support landed within days of the OS itself. The Mac app's current build is dated early September 2026, and a June 2026 release introduced Airmail MCP, a locally run server that lets an outside AI assistant act on your mail with per-assistant approval.

What looks abandoned is the marketing site, not the app. It still leads on Airmail 3, still pitches iOS 14 widgets and the Touch Bar, has no pricing or features page, returns a 404 on its support URL, and its iPad and iPhone download buttons point at the Mac App Store. Judged by airmailapp.com you would conclude it had been left to rot; the shipping builds say otherwise.

Do Spark and Airmail sync across devices?#

Both do, through different paths. Spark syncs settings, smart folders, templates and team data through a Spark account on its own servers, which is what lets a Windows laptop and an Android phone see the same setup as your Mac. A subscription bought on one platform unlocks the paid features on the others.

Airmail syncs accounts, signatures, templates, rules and folder colours through iCloud. That keeps your configuration consistent across Mac, iPhone, iPad and Apple Watch, and stops at the edge of the Apple ecosystem because there is nothing beyond it to sync to.

In both cases the mail itself syncs through your provider. Gmail, Outlook, iCloud, Exchange and IMAP accounts stay authoritative, so switching clients does not move your mail and leaving either app does not strand it.

Airmail subscription vs Spark premium: two different shapes#

Spark is a tiered per-seat subscription: a genuine free plan, then Plus, Pro and a quote-based Enterprise tier, billed monthly or yearly, with a seven-day trial on the two middle tiers when you subscribe in-app. AI is metered against a per-plan quota with paid top-ups, so heavy AI use is a variable cost. Older customers sit on legacy plans, and some feature pages still use a retired plan name.

Airmail is free with in-app purchases. The unpaid version is restricted, most visibly by dropping multi-account support, and Airmail Pro is an auto-renewing monthly or yearly subscription. A one-off Pro purchase is also listed on iOS, and AI Composer is sold separately. Airmail Pro subscribers on iOS and Airmail 3 buyers since January 2019 are grandfathered; the Business edition is sold without a subscription.

The practical difference: Spark's cost scales with seats and AI usage, Airmail's is closer to a fixed per-person unlock. Neither shape is stable enough to quote from a blog post, and one of them has no pricing page at all.

Who each one is genuinely for#

A third option, honestly#

We build AI Emaily, so treat this section as the interested party it is. It belongs at the end rather than the top of this comparison for a straightforward reason: a large share of people searching for Spark versus Airmail are specifically looking for an Apple Mail alternative that is not AI-first. If that is you, stop here. Spark with +AI switched off, or Airmail, is the right answer and we are not.

Where we are a real candidate is the row above that says neither. Spark and Airmail both treat AI as a feature inside a manual client: you open the message, then ask for a draft or a summary. AI Emaily inverts that. The agent triages and drafts continuously, and Copilot mode holds every send for your approval, with undo and an audit trail of what the agent did and why. Voice comes from a Personal Context brain you write and per-client profiles you set, not from anything scraped out of your sent folder.

On macOS we ship a real downloadable app, not a bookmark. It is an Electron shell around the web interface, which means features land on desktop the same day as on web, and also means it will not match a native AppKit client on memory footprint or deep OS integration. It is Apple Silicon only, with no Intel Mac build, and it is not in the Mac App Store. Version 1.0.7 shipped on 17 July 2026.

The honest limits, in one place. We have no Apple Watch app, where both Spark and Airmail do. We have no Vision Pro build, where Airmail does. Offline is partial by design, read and draft, not a complete local archive, so neither of the two clients here is beaten on that. Packaging is a seven-day free trial on Pro and Autopilot with a card required, and no permanent free tier, where Spark has a genuine free plan and Airmail has a restricted free version. If a free forever tier is the requirement, we are out.

If what you want is fewer messages reaching you at all rather than faster tools for handling them, see the AI email assistant page or the pricing page, and the side-by-side with Spark if that is the direction you were leaning.