Hadavar

Your mail, handled by AI

Hadavar indexes your mailbox on this device, groups threads by what they need from you, summarises the long ones, and drafts replies in your voice. Nothing leaves your machine without a keystroke.

Download for macOS 0.1.0 · 7.4 MB · macOS 13+ · Apple silicon
J K move ↵ open E archive / search ⌘K commands ? all shortcuts
A thread in Hadavar with a summary and a drafted reply
Streams

Eight streams instead of one inbox.

Every thread is classified by what it needs from you: Needs reply, Waiting on them, FYI, Scheduling, Newsletter, Cold, Travel, Calendar. Stream counts exclude anything still being sorted, so a stream reads zero exactly when it is empty.

Mail is never hidden while the classifier works. Unsorted threads sit above the sorted rows in every stream, carrying no colour until a decision has been made, and a row never moves under your cursor — a reclassification waits as a dashed chip until you look away.

The Hadavar overview, with unread broken down by stream and today's alerts
Summaries, drafts, nudges

Answers with their sources attached.

Threads with more than one message open with a summary that says how many messages it read and can be regenerated with a keystroke. Drafts state what they were built from — past threads, a meeting on your calendar — and flag anyone cc'd on the thread who has fallen out of the reply. Mail you are waiting on gets a follow-up nudge with the number of days attached.

Ask a question in the search bar and the answer comes back with the threads it was drawn from, so you can open them and check.

A natural-language answer in Hadavar, with the threads it cites
Day view of the calendar inside Hadavar

Your calendar is in the same window. Times offered in a reply are checked against it first, invitations can be answered from the thread, and a booking only goes out on a shortcut that cannot fire by accident.

On device

The index stays on your machine.

Connecting an account asks Google for what the app actually does: read and organise your mail, send it, read and write calendar events, list your calendars, and read and set your Gmail auto-reply and signature. Sending and booking are in that list because sending and booking are features — but neither ever happens on its own. Both take a keystroke you press, and both sit in an undo window before they leave. Contacts, Drive, and Gmail's filter and forwarding settings are not requested at all.

Access can be revoked from your Google account or from the command palette, and disconnecting removes the local index without deleting anything from Gmail.

The Hadavar connect screen, listing the permissions it asks for

Free while it is in beta

Connect a Gmail account, watch the backlog sort, and read your mail while it does.

Download for macOS 0.1.0 · 7.4 MB · macOS 13+ · Apple silicon
Privacy Last updated 19 August 2026

Hadavar is a mail client that runs on your computer. Your mail, its index, your labels, your streams and your settings are stored on that machine. We do not have a copy and cannot read them.

What stays on your device

The full-text index of your mailbox, thread metadata, your stream assignments, snoozes, labels and the notes you write about yourself for sorting. It lives in a folder under Application Support, and your Google token lives in your login Keychain — so dragging the app to the Trash leaves both of them behind. “Disconnect this account” is what removes them: it signs out, deletes the token, and wipes the index. Nothing is deleted from Gmail.

What Google is asked for

Six permissions, and each one is something the app does: read and organise your mail, send mail, read and write calendar events, list your calendars, read and set your Gmail auto-reply and signature, and see your own address. Sending and booking are requested because sending and booking are features — they take a keystroke you press, and sit in an undo window before they leave. Contacts, Drive, and Gmail’s filter and forwarding settings are not requested at all. You can revoke all of it from your Google account at any time.

When text leaves the machine

Sorting, summaries, drafts, Ask and deep research send the text of the threads involved to Anthropic, through the Claude tool installed on your own machine and under your own subscription — so what happens to it there is governed by the terms of that subscription rather than by anything we promise here. Link payloads and hidden characters are stripped out first. All of it is one switch in Settings, and turning it off leaves a working mail client.

What we collect

Nothing. There is no Hadavar account and no Hadavar server. The app talks to Google, to Anthropic when you have that switched on, and to a website only when you click its unsubscribe link or ask for deep research. There is no analytics of any kind, and no crash reporting — which also means we do not know when it breaks, so please write.

Questions go to support@hadavarmail.com.

Terms of Use Last updated 19 August 2026

Hadavar is in beta and free to use. Installing it means you accept the terms below.

The beta

Features change and break during the beta. Keep your mail in your provider’s account — Hadavar is a client, not a backup, and a local index can be rebuilt but not recovered.

Your licence

You may install Hadavar on the computers you use, for personal or commercial work, for as long as the beta runs. You may not resell it or redistribute modified builds.

Your account and your mail

You are responsible for the accounts you connect and for having the right to read the mail in them. Revoke access at any time; doing so ends the app’s access immediately.

AI output

Summaries, drafts and answers are generated and can be wrong. Read anything before you send it. You own what you send; you are responsible for it.

No warranty

The beta is provided as is, without warranty of any kind. We are not liable for lost mail, missed messages, or anything sent in error.

Ending it

You can uninstall whenever you like. We may end the beta or change these terms with notice on this page; continuing to use the app after that means accepting the change.

Questions go to support@hadavarmail.com.