Letterbot Add to Chrome, free

Turn rough notes into clear emails, right in Gmail.

Write, reply, summarize and fix emails in 9 tones and 13 languages.

Add to Chrome, free Open the web app

Works in Gmail. Any other email app via the web app.

Live demo: the Letterbot panel inside Gmail turns rough notes into a finished email and inserts it into a new message. Use the buttons below the demo to switch examples or pause it.

  • 10,000+downloads
  • Made in Germany by one developer
  • Free plan, no credit card

It sits in Gmail until you need it.

Install once. Letterbot adds a button to Gmail's compose and reply windows and sends nothing until you click a tool.

  1. Add Letterbot to Chrome

    Install it free from the Chrome Web Store. The free plan starts right away, no credit card needed.

  2. Open it in any email

    Click the Letterbot button in a compose window or a reply. Pick a tool, a tone and a language.

    Or press AltShiftL

  3. Insert, edit, send

    Type rough notes and press Generate. Insert the draft into your email, change what you like, then send it yourself.

Not on Gmail? Use the web app in any browser and paste the result into Outlook, Apple Mail or any other email app.

Open the web app

Six tools for the emails you write every day.

All six live in one panel next to your Gmail compose window.

Write email

Describe what you want to say. Letterbot writes the whole email.

All plans

You type

remind team: weekly numbers due thu 12:00, use the new sheet pls, thx

Letterbot writes, tone Friendly

Hi all, A quick reminder that this week's numbers are due on Thursday at 12:00. Please use the new sheet from now on. Thanks, Jonas

Examples show typical output. Results vary with your input.

13 languages.

EnglishThe same sentence, written by Letterbot

Thanks for the update. I'll send the signed contract by Friday.

In 9 tones FormalCasualFriendlyPoliteRespectfulAssertiveEmpatheticConciseEnthusiastic

Start free. Upgrade when you write more.

Every plan includes the Gmail extension, the web app, all 9 tones and all 13 languages.

Free

For trying it on real emails

€0/ month

Add to Chrome, free
  • 5 requests a day
  • 4 tools: Write, Reply, Subject lines, Summarize
  • No credit card needed

Basic

For everyday email

€3.99/ month

Choose Basic
  • 100 requests a day
  • All 6 tools
  • Adds Grammar fix and Sales email

Professional

For high-volume inboxes

€19.99/ month

Choose Professional
  • 800 requests a day
  • All 6 tools
  • Priority processing

Prices in euros, billed monthly. Cancel paid plans anytime. Email support on every plan. Compare plans and upgrade

Common questions

More answers on the FAQ page, or write to us.

How does Letterbot AI work?

Letterbot AI uses large language models from OpenAI. You describe what you need in plain words, pick a tone and a language, and it writes a complete email in seconds, right inside Gmail. With any other email app, use the web app and paste the result.

Is Letterbot AI free?

Yes. The free plan gives you 5 requests a day with Write, Reply, Subject lines and Summarize, and no credit card is needed. Basic (€3.99 a month, 100 requests a day) and Professional (€19.99 a month, 800 requests a day) add Grammar fix, Sales email and higher daily limits.

Which email clients does Letterbot AI support?

The Chrome extension works directly inside Gmail. With any other email app, including Outlook and Apple Mail, open the web app at letterbot.ai/app, write your email there and paste it into your app.

Which languages does Letterbot AI support?

13 languages: English, German, Spanish, French, Portuguese, Croatian, Japanese, Korean, Chinese (Simplified), Chinese (Traditional), Arabic, Hindi and Russian. You pick the language in the Letterbot panel.

Does Letterbot read my inbox?

No. It only looks at the email you are replying to, and nothing leaves your browser until you click a tool. Then the text you typed, plus that email for Reply or Summarize, goes to Letterbot's server and to OpenAI models to create the result. Letterbot never sends emails for you. Details are in the privacy policy.

What happens when I reach my daily limit?

Letterbot tells you that today's requests are used up. Your count resets at midnight in your time zone. If you need more before then, upgrade to Basic or Professional.

Does it work on my phone?

The extension needs Chrome on a computer. On a phone or tablet, open letterbot.ai/app in your browser, write the email there and copy it into your mail app.

Does it require an internet connection?

Yes. The AI runs in the cloud, so an active internet connection is required.

Try it on the next email you write.

Free plan with 5 requests a day. No credit card.

Add to Chrome, free
Or install the web app: Install on Windows Install on Mac

Works in Gmail. Any other email app via the web app.