AI email writer
Describe the campaign in a sentence and get a subject and a friendly, plain-text email with merge tags already in place. Rewrite it shorter, friendlier, more formal or in another language with one click.
Made forSales outreachRecruitingEvent & webinar invitesShop customer updatesSchools & clubsPartnerships & PRProduct announcements
Features
Everything a mail merge needs, plus an AI writer
Write once, send to hundreds, and every email still reads like you wrote it for that one person.
A personal line for every recipient
AI reads each row (company, role, notes) and writes one sentence just for that person. You review every line before anything is sent.
Mail merge from Sheets or CSV
Paste from Google Sheets or Excel, upload a CSV, import a Sheet link, or collect addresses from a web page. Every column becomes a tag like {{First name|there}}.
Checks before you send
Empty or unknown tags, identical emails, spam-trigger words, shouting subjects, too many links and a missing unsubscribe line are flagged before the first email goes out.
Safe sending, on autopilot
One email at a time with a random pause, under Gmail's daily limit. Big lists simply continue the next day, and Gmail quota errors pause the campaign instead of failing it.
Private by design
There is no Mass Email server. Your lists, drafts and campaigns stay in your browser, and Google's permission covers sending only: Mass Email cannot read your inbox.
How it works
From spreadsheet to sent in three steps
Mass Email opens in Chrome's side panel next to Gmail, so you never leave your inbox.
- 1
Add your recipients
Upload a CSV, paste rows from Google Sheets or Excel, or import a Sheet link. Mass Email finds the email column and removes invalid addresses, duplicates and people who unsubscribed.
- 2
Write it with AI
Let AI draft the email from a short brief, then add a personal opening line for each recipient. Merge tags fill in names, companies and cities, with fallbacks for empty cells.
- 3
Check, test and send
Read every email exactly as each person will get it, send yourself a test, then start now or schedule for later. Sending keeps going with the panel closed.
Campaigns
Watch it go out — or close the panel and forget it
Campaigns run in the background, one email at a time. When the day's limit is reached they wait and continue on their own; if Gmail pushes back, they pause instead of failing.
- Pause, resume or cancel at any time
- Schedule a campaign for later
- See who got it, who failed and why
- Export results as CSV, or duplicate a campaign
AI
Pick the AI that fits you
Both write plain, human-sounding emails and keep your merge tags intact.
Free · private
Chrome built-in AI
- Runs on your computer; nothing leaves it
- No key, no account, no cost
- Needs a recent Chrome on a capable computer
Best writing
Claude by Anthropic
- Top writing quality in any language
- Uses your own Anthropic API key
- The key stays in your browser
Pricing
Free while in beta
No credit card, no account. Pro features are on the way.
Free
$0
during the beta
- AI email writer, rewrites and translation
- AI personal line for each recipient
- Mail merge from CSV, Google Sheets or a web page
- Checks before sending and test emails
- Safe pacing and daily limits, scheduling
- Unsubscribe line, header and shared unsubscribe list
- Campaign progress and CSV export
Pro
Coming soon
everything in Free, plus
- A different attachment for each recipient (certificates, invoices)
- Follow-ups that stop when someone replies
- Open and click tracking
- Team templates and a shared unsubscribe list
FAQ
Questions, answered
Is Mass Email free?
Yes. Everything on this page except the "coming soon" features is free while Mass Email is in beta. With Chrome's built-in AI the writing is free too; with Claude you use your own Anthropic API key.
Can Mass Email read my emails?
No. Mass Email asks Google for permission to send email as you (the gmail.send scope) and to see your email address. It has no permission to read, search or delete anything in your mailbox.
How many emails can I send per day?
Gmail allows about 500 emails a day from a personal account and 2,000 from Google Workspace. Mass Email stays below that by default (400 and 1,500) so normal email still gets through. Larger lists continue automatically the next day.
Will my emails land in spam?
Each email is sent one by one from your own Gmail, personalized and in plain text, which looks like normal email to spam filters. The checks before sending warn about the usual problems (spam words, identical emails, too many links, no unsubscribe line). Only email people who expect to hear from you.
Which AI does it use, and what is sent to it?
Two choices: Chrome's built-in AI, which runs on your computer so nothing leaves it, or Claude by Anthropic with your own API key. With Claude, the brief and the rows you personalize are sent to Anthropic to write the text.
Where are my contact lists stored?
In your browser, on your computer. There is no Mass Email server or account: lists, drafts and campaign history stay in Chrome's local extension storage and are removed when you uninstall.
Does it work with Google Workspace accounts?
Yes, with any Gmail or Google Workspace account signed in to Chrome. Workspace accounts get the higher daily limit automatically.
How do recipients unsubscribe?
Every email can end with a short "reply unsubscribe" line and carries an unsubscribe header that Gmail shows as an Unsubscribe link. Add those addresses to your unsubscribe list and every future campaign skips them.
Does it work in Vietnamese and other languages?
Yes. The AI writes and translates in Vietnamese, English, Spanish, French, Japanese and more, and emails are sent in UTF-8 so accents and emoji arrive intact.
New to mail merge? Read the step-by-step guide to sending mass email from Gmail.
Your next campaign, written and sent before lunch.
Free, private, and it sends from the Gmail you already use.