★★★★★
NO. 1 MAIL PLUGIN
Open Source · MIT · For macOS

Type your thoughts.
AI writes the email.

A plugin for Apple Mail that turns your rough thoughts into a finished reply — using Claude, GPT, or Gemini. Your keys. Your data. Right inside the app you already use.

Download for macOS v1.4 · 2.1 MB View on GitHub
AI Reply
Your thoughts
⌥ H
Claude reply
⟶ Three principles

Built to stay out of your way.

— 01

Reads the whole conversation

AI gets the full email thread as context — not just the last message. It sees what's been said, who said it, and what needs a response.

Thread — Thursday lunch?
S
Sarah Chen
Tue 3:41 PM
Hey! Want to grab lunch on Thursday? I was thinking that new place on 5th street.
Y
You
Tue 4:02 PM
Sounds good! What time works for you?
S
Sarah Chen
Wed 9:15 AM
How about 12:30? I'm free after my morning meeting.
↑ AI reads all 3 messages for context
— 02

Use any model you want

Switch between providers right in settings — Claude, GPT, or Gemini. Same prompt, different voice. Whatever works best for the email at hand.

Settings → Model
C
Claude
claude-sonnet-4.5
✓
C
ChatGPT
gpt-5
✓
G
Gemini
gemini-2.5-pro
✓
— 03

Your keys. Your data.

No accounts, no subscriptions, no servers in the middle. API keys live in the macOS Keychain. Your email never touches our infrastructure — because there isn't any.

API Keys
macOS Keychain
Anthropic
sk-ant-api03-•••••••••••••••••••
OpenAI
sk-proj-•••••••••••••••••••••••••
Google
AIzaSy•••••••••••••••••••••••••
● Nothing leaves this Mac except your API calls.
⟶ Frequently asked

Questions, answered.

⟶ Open Source

Free forever.
Read the source.

MIT licensed. Audit the code, file an issue, send a patch. Built by one person, for people who take email seriously.

2.1k
★ stars
34
contributors
v1.4
latest release
MIT
license
github.com/jpwahle/ai-apple-mail ↗