Kestrel vs Apple Mail

Apple Mail comes with every Mac, iPhone and iPad. It sets up iCloud, Google, Exchange and Yahoo accounts from an address and password, and takes any other provider over IMAP or POP. Apple Intelligence adds summaries, Priority Messages and Smart Reply on Macs with M1 or later. Kestrel is a separate app for Gmail and IMAP accounts, built around the keyboard. Every action has a key, and the inbox splits into Important and Other.

At a glance

Feature	Kestrel	Apple Mail
Price	$20 a year, on up to 3 Macs	Free, comes with the Mac
Platforms	Mac	Mac, iPhone, iPad
Mail accounts	Gmail and any IMAP account	iCloud, Gmail, Exchange, Yahoo, IMAP, POP
Mail passes through	Your provider, and Anthropic if you add a key	Your provider, and Apple's cloud for some AI
AI	On your Mac, or with your own Anthropic key	Apple Intelligence, on device or Private Cloud Compute
Account needed	None, a license key	None

Keys

In Apple Mail, shortcuts belong to menu commands and mostly use ⌘ or ⌃, such as ⌃⌘A to archive. You can add your own in System Settings for any command in the menus.

In Kestrel every action has a key, most of them a single letter: E marks done, H sets a reminder, # trashes. ⌘K searches every action and folder by name and shows each one's key, and a practice inbox teaches the first ones.

Inbox and calendar

Kestrel splits the inbox into Important and Other, plus splits of your own written as searches, and shows Google Calendar next to your mail, with booking pages through an optional team server.

Price and accounts

Apple Mail is free and takes Exchange and POP accounts. Kestrel takes Gmail and IMAP accounts only, and costs $20 a year for up to 3 Macs, with a free demo inbox to try first.

Pick Kestrel if

You want every action on a single key, and ⌘K to find the rest.
You want the inbox split into Important, Other and splits of your own.
You want Google Calendar next to your mail in the same app.
You want AI on a Mac without Apple Intelligence, through your own Anthropic key.

Pick Apple Mail if

You want a free app that is already on your Mac, iPhone and iPad.
You use Exchange or a POP account.
You don't want to create a Google Cloud project for Gmail.

The details

Detail	Kestrel	Apple Mail
Price	$20 a year for a license key, bought on account.laibe.cc. One key works on 3 Macs. The demo inbox, with made-up mail, is free to try.	Free. Mail is one of the apps that come with every Mac.
Platforms	Mac only, on macOS 15 or later. A direct download, not on the Mac App Store, and it updates itself.	Mac, iPhone and iPad.
Mail accounts	Gmail and Google Calendar, through a free Google Cloud project you create yourself in about five minutes. Any IMAP account for mail, with Proton Mail (through Proton Mail Bridge), Fastmail and iCloud Mail filled in for you. IMAP accounts have no calendar and keep recent mail only, such as the latest 400 in the inbox.	iCloud, Google, Microsoft Exchange and Yahoo set up from an email address and password. Any other provider works over IMAP or POP, with its server settings entered by hand.
Where your mail goes	Straight between your Mac and Google or your IMAP server. Kestrel's own servers see no mail. account.laibe.cc checks the license key, and kestrel.laibe.cc offers updates if you allow it. Sign-ins, mail passwords and API keys stay in the macOS keychain. Read statuses, team comments and booking pages need a team server you deploy to your own Cloudflare account.	Mail connects to each account's own incoming and outgoing servers. Protect Mail Activity downloads remote content privately in the background and hides your IP address from senders. Apple Intelligence runs on the Mac, or on Private Cloud Compute, which Apple says doesn't store your data or make it accessible to Apple.
AI	Kestrel AI writes and rewrites drafts, summarizes threads, answers questions about your mail and labels new mail. It runs on Apple Intelligence on your Mac (macOS 26), or on Claude with your own Anthropic API key, which sends the text a feature needs to Anthropic. Auto Labels is on by default, and every part can be turned off. AI apps such as Claude Code can search, triage and draft through its MCP server, never send.	Apple Intelligence on Macs with M1 or later. Summaries of emails and threads, Priority Messages, Smart Reply and Writing Tools. Models run on the Mac, or on Apple's Private Cloud Compute for some requests.
Keyboard	Every action has a key: E marks done, H sets a reminder, # trashes, / searches. ⌘K finds any action or folder by name and shows its key. A practice inbox teaches the first keys.	Shortcuts for menu commands, such as ⌘N for a new email and ⌃⌘A to archive. You can add or change a shortcut for any menu command in System Settings, under Keyboard Shortcuts and App Shortcuts.
To sign up	No Kestrel account. You sign in to Google or your IMAP server, and add a license key.	Nothing beyond the mail accounts you add.

Sources

Apple Mail’s side was checked against these pages on October 29, 2026. Write to [email protected] if something has changed.