Privacy policy

Last updated 13 November 2026

Mailglow keeps everything on your computer. It has no server, no account and no analytics, and it never asks Google for access to your mail.

What Mailglow reads

For each Gmail account you’re signed in to in Chrome, Mailglow reads Gmail’s own feed of unread mail. That feed holds, for up to 20 unread emails per account: the sender’s name and address, the subject, a one-line preview and the time. Mailglow can’t read the full text of an email, its attachments, or mail you’ve sent.

It also reads your account addresses from that feed, to tell your accounts apart.

What it stores, and where

Mailglow stores your accounts, their colours and names, which emails you’ve already seen, and your settings in Chrome’s local storage on this computer. Nothing is synced to us or anyone else. Removing the extension deletes it all.

What it changes in Gmail

Only what you click. Mark read, archive and delete are done by Gmail itself, with your existing Gmail session, and each can be undone. Mailglow never sends email and never changes anything in the background.

Who it talks to

Only mail.google.com, to read the feeds above and carry out the actions you click. Sender pictures come from icons Chrome already saved for websites you’ve visited; Mailglow downloads nothing to show them. It sends no data to esigna, to analytics services or to any other third party.

Permissions

• mail.google.com: read your accounts’ unread-mail feeds and carry out the actions you click.
• storage: keep your accounts, settings and what you’ve seen on this computer.
• alarms: check for new mail on a schedule.
• cookies: read Gmail’s own action token when you archive, mark read or delete. Mailglow reads no other cookie.
• offscreen: follow light and dark mode and play the optional chime.
• favicon: show senders’ site icons from Chrome’s own cache.

This website

mailglow.app is a static page. It sets no cookies and runs no analytics or ads. The demo popup on the home page uses made-up mail and touches no real inbox. Our host, Vercel, keeps standard server logs.

Changes and contact

If this policy changes, the date above changes with it, and anything that affects what the extension reads or sends will be described in the extension’s update notes. Questions: hello@mailglow.app.

Gmail, Chrome and the Chrome Web Store badge are trademarks of Google LLC. Mailglow isn’t made by or affiliated with Google.