Which AI assistants can read Mail and Calendar?

One question decides it: does your assistant run on your Mac, or in someone else's cloud? If it runs on your Mac it can read your Mail, Calendar and Messages once you connect those apps to it, and there are 24 of those, from Claude Desktop and Claude Code to Raycast and Perplexity. If it runs on the web, meaning claude.ai, ChatGPT on the web, Grok or Cowork, it cannot, and the desktop version of the same assistant is the way round it.

I built Pomeroy, the menu-bar app doing the connecting, so this is an interested party's map. Every fact about another tool was checked on 3 September 2026, each has a comparison page listing its sources, and where another tool is the better answer this post says so.

How this list was put together

The list is every AI assistant Pomeroy can set itself up in, 24 of them, plus the ones that cannot read your Mac at all and what to use instead. They are here because each runs on your Mac and can be pointed at your Apple apps; the browser-only ones are named rather than left out quietly.

The order is the eight this site's app pages show first, which between them cover the shapes an assistant takes (a chat app, terminal agents, editors, a launcher, an answer engine, and one that runs the model on your Mac), then the rest alphabetically. Nothing here is a ranking, and every fact was checked on 3 September 2026.

Which AI assistants can read Mail, Calendar and Messages?

These eight can, with what setting each up looks like. The two after them cannot, which matters if one is what you have open.

• Claude Desktop is Anthropic's Mac app, and has the shortest setup here: Pomeroy opens its Claude extension, Claude Desktop asks to install it, and you approve. Pick this if you want a free assistant and the least fiddling. Not for you if you work in a terminal or an editor all day.
• Claude Code is Anthropic's terminal agent, and Pomeroy registers itself for every project rather than one folder. Warp reads the same setup. Pick this if you already live in the terminal. Not for you if you would rather not open one.
• Cursor is the AI code editor. Pomeroy opens Cursor's own install link, and Cursor shows what it is about to add and asks you to confirm. Pick this if your day is spent in an editor and you want your schedule answerable in the same window. Not for you if you do not code.
• VS Code works the same way, through its own install link, and needs no restart. Pick this if VS Code with Copilot chat is already open. Not for you if you want a plain chat window.
• Codex is OpenAI's agent, and the way a ChatGPT user gets at their Mac: one registration reaches the Codex command-line tool, the editor extension and the ChatGPT desktop app. Pick this if ChatGPT is your assistant. Not for you if you only ever use ChatGPT in a tab, which cannot reach your Mac.
• LM Studio runs the model itself on your Mac, so your mail is read by an assistant with no cloud in it at all. Pick this if you want nothing leaving the Mac, including the question you asked. Not for you if you want the strongest models: a local one has less room for tools.
• Raycast is the launcher with AI built in, and the quickest way to ask something small: Pomeroy copies the three values its form asks for and you paste them in. Pick this if you would rather hit a keyboard shortcut than open an app. Not for you if you want one click, because this one is a paste.
• Perplexity is the answer engine's Mac app, set up by pasting the two values its Add Connector form asks for. Pick this if Perplexity is already where you search. Not for you if you use Perplexity in a browser: only the Mac app reaches your Mac.
• claude.ai in a browser cannot read your Mail, Calendar or Messages, and neither can Cowork on the web. Both reach only the public internet, where Pomeroy runs nothing on purpose. Pick this if you want a chat assistant and nothing touching your Mac. Not for you if you want your inbox answerable: Claude Desktop is free and the same account.
• ChatGPT on the web is in the same position, and so is Grok. Use the ChatGPT desktop app instead, whose Codex side runs on your Mac. Pick this if your work is all in the tab. Not for you if you came here about your mail.

What about the other assistants?

The other 16 are set up the same two ways and work as well. Alphabetically: AnythingLLM, BoltAI, ChatWise, Cherry Studio, Cline, Gemini CLI, GitHub Copilot CLI, goose, JetBrains AI Assistant, Kiro, Msty Studio, OpenCode, VS Code Insiders, Warp, Windsurf and Zed. Each has a setup page of its own under connect.

What should you check before picking one?

Four questions settle it, and they work on any tool, including ones this site does not list. Does it run on your Mac? That rules in all 24 above and rules out claude.ai, ChatGPT on the web, Grok and Cowork. One click or a paste? 14 set themselves up in one click, Claude Desktop and Codex among them; the other 10, Raycast and Perplexity among them, take a configuration Pomeroy writes.

Should it be able to send as you? Pomeroy has no action that sends mail or a message, whichever assistant asks, while Macuse sends mail and messages and LMCP sends and replies in Mail, Messages, Teams, Slack and WhatsApp. And which macOS are you on? Pomeroy needs macOS 15 or later, while Macuse and LMCP run on macOS 13 or later.

Which one works with ChatGPT?

The ChatGPT desktop app, through Codex. The app has two sides: its Codex side runs on your Mac and can read your Apple apps, and its chat side is the web assistant and cannot.

ChatGPT on the web is a different matter, and no configuration fixes it. For a cloud assistant that reaches your Mac, Macuse lists ChatGPT and claude.ai on the web through its Remote Access, and LMCP through an optional cloud relay.

Do I need Claude Desktop?

No. Claude Desktop is one of the 24, not a requirement, and you can connect several at once. Every app starts switched off whichever assistant asks, and the 50 free actions a week are one count per Mac, shared across all of them.

What can you actually ask?

Asks the tools answer, in whichever assistant you picked:

• "What’s on my calendar today?"
• "Find the flight confirmation from March and tell me the times."
• "Find the message with the door code."

The Apple Mail, Apple Calendar and Apple Messages pages list what each app can and cannot do.

What Pomeroy cannot do

It cannot send. No assistant on this list, however you set it up, can send mail, a message, a reply or an invitation through Pomeroy, because no such action exists. It never deletes anything, never creates or edits a contact, and the only change it makes to a reminder you already have is ticking it off.

It also cannot reach an assistant running in someone else's cloud, which is why two entries above are a "no". It is Mac only, on macOS 15 or later, and covers 9 Apple apps rather than everything on your Mac. If one of those is what you needed, a tool on the comparison pages is your answer.

How do you set it up?

Four steps, once. Download Pomeroy, switch on the apps you want, press Set up beside your assistant, and answer the macOS prompt for each app. It is free for 50 actions a week, and $19 once removes the weekly limit. Start at the download page.

So which should you pick?

If you have no assistant yet and want your mail and calendar answerable this afternoon, Claude Desktop: free, one approval, and you can add a second assistant later without setting the apps up again. If you already work in a terminal or an editor, use what is open: Claude Code, Codex, Cursor or VS Code, all one click, and LM Studio if you want the model on your Mac too.

If what you want is the assistant sending mail or replying to messages for you, Pomeroy is not your answer. Macuse sends mail and messages, and LMCP is free and reaches Outlook, Teams, Slack and WhatsApp as well as the Apple apps. Both run on macOS 13 or later, which also settles it if your Mac is older than macOS 15.

Pomeroy is for the reader who wants the assistant they already use to read the Apple apps on their own Mac, answer from what it finds, and never be able to send as them. Download it, or read the comparisons first.