Describe the email
Who it is for, what you want to say and what should happen next. A sentence or two is enough; paste notes or the message you are replying to if you have them.
AI Email Writer
Free AI email writer. Describe what to say, pick a tone, and get a ready to send professional email with subject line in seconds. No sign-up.
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What should the email say?
Purpose: Outreach, Follow up, Apology, Request, Thank you, Introduction, Announcement, Decline politely
Tone: Professional, Friendly, Formal, Concise, Persuasive, Warm
One free email per visitor, verified automatically, no account needed.
How it works
How to write an email with AI in three steps
No templates to fill, no blank page. Say what you mean and get a finished email.
Pick purpose, tone and length
Outreach, follow up, apology, request, thank you and more, in a professional, friendly, formal or persuasive tone, short or detailed.
Copy and send
You get a subject line, greeting, body and sign off ready to paste into Gmail, Outlook or your CRM. Edit a word or two and send.
Examples
AI email examples with the exact briefs
Every email below was written on Krater from the short brief shown underneath. Copy a brief, change the names and details, and get your own version.
Sales follow up
Subject: Quick follow up on your quote Hi Anna, I wanted to check in on the quote I sent over last Tuesday. If anything is unclear or you would like to adjust the scope, I am happy to walk through it. Would Thursday work for a short call? I can send a few time slots. Best regards, Malte
Brief: Follow up with Anna about the quote I sent last Tuesday, ask if she has questions, propose a call Thursday
Polite decline
Subject: Re: CRM proposal Hi Jonas, Thank you for the detailed proposal and for taking the time to present it. After reviewing our plans for this year, we have decided to stay with our current system for now. I would like to keep the conversation open for next year, when we revisit our tooling. Kind regards, Sara
Brief: Decline a vendor proposal for a new CRM, we are staying with our current system this year, keep the door open
Apology to a customer
Subject: We are sorry about your delayed order Hi Priya, I am sorry your order arrived two weeks later than promised. That is not the experience we want for you, and I understand the frustration. We have refunded 20 percent of your order as an apology; it should appear within a few days. Thank you for your patience, Lena
Brief: Apologize to a customer whose order arrived two weeks late, offer a 20 percent refund, warm tone
Cold outreach
Subject: Product photos without the reshoots Hi Daniel, Brands like yours spend weeks each season reshooting the same products for new campaigns. We help teams create those variants from existing photos in minutes. Would a 15 minute call next week be useful? Best, Tom
Brief: Reach out to the marketing lead of a mid sized furniture brand, offer a 15 minute call about product photo automation, concise
Meeting request
Subject: 30 minutes next week for my development plan Hi Michael, Could we find 30 minutes next week to talk through my development plan for the coming quarter? I would like to align on priorities and get your input on a few ideas. I am flexible on timing and happy to work around your calendar. Thank you, Elena
Brief: Ask my manager for 30 minutes next week to discuss my development plan, professional
Thank you after an interview
Subject: Thank you for today Hi Rachel, Thank you for taking the time to meet today. I especially enjoyed our discussion about the onboarding redesign and how the team approaches research. The conversation confirmed my interest in the role, and I look forward to hearing about next steps. Best regards, Omar
Brief: Thank the hiring manager after an interview for a product designer role, mention I enjoyed discussing the onboarding redesign
AI email generator
What an AI email writer does
An AI email writer turns a short description of what you want to say into a complete, well structured email: subject line, greeting, clear body and sign off, in the tone you choose. You provide the context (who, what, why, what should happen next) and the model handles wording, structure and politeness, so a message that would take fifteen minutes to write takes fifteen seconds.
It covers the emails people write every day at work: sales outreach and follow ups, customer replies and apologies, requests to colleagues and managers, introductions, announcements, thank you notes and polite declines. Because you set the purpose and tone, the same brief can become a warm customer reply or a concise executive update.
On this page you can write one email free with our fast default model, in the language you write your brief in. Inside Krater the same brief works with every language model we host, with your own writing style, attachments, threads and follow ups in one workspace.
Every language model in one place
Pick the model for the email
The free email uses Gemini 2.5 Flash, a fast model with clear business writing. Inside Krater you can draft the same email with every model below and send the best version.
Email types
Outreach, follow ups, apologies: every business email from one brief
Different emails need different structure. These are the four types people generate most, and what to include in the brief.
Sales and cold outreach
Lead with the recipient's problem, one line on how you help, and a single low effort ask. Give the writer the role and industry of the recipient and the one outcome you want.
Follow ups and reminders
Reference the previous message or meeting, add one new piece of value or a clear deadline, and make the next step easy. Mention what you sent and when.
Customer service and apologies
Acknowledge the problem plainly, take responsibility, state the fix and the timeline. Tell the writer what went wrong and what you are offering.
Requests, introductions and declines
Be clear about the ask or decision early, give a short reason, and close warmly. Include names, dates and any constraint that matters.
How to brief an AI email writer
- Name the recipient and your relationship: "my manager", "a new lead", "a customer who complained".
- State the one thing that should happen after they read it: reply, book a call, approve, forgive.
- Include specific facts (dates, product names, amounts) so the email is ready to send, not a template.
- Pick the tone deliberately: concise for busy executives, warm for customers, formal for first contact.
What people write with AI
One brief, every email your business sends
An AI email generator is the fastest way to get from "I need to write to them" to a sent message.
Sales outreach
Personalized cold emails and follow up sequences that sound like you, not a template.
Customer support
Clear, empathetic replies, apologies and status updates that resolve issues in one message.
Internal communication
Requests to managers, project updates, announcements and meeting follow ups.
Recruiting and HR
Interview invitations, offers, rejections and onboarding emails with a consistent voice.
Partnerships and vendors
Introductions, proposals, negotiations and polite declines that keep relationships intact.
Job seekers
Applications, thank you notes after interviews and networking messages that stand out.
Suitable for everyone
One AI email writer for every role
Whether you send five emails a day or five hundred, the workflow is the same: brief, tone, send.
Founders and small businesses
Handle sales, support and partner emails at the quality of a dedicated team.
Sales and business development
Write personalized outreach and follow ups in seconds and spend the time on calls.
Customer support teams
Answer faster with consistent, empathetic replies in every customer's language.
Managers and operators
Turn notes into clear updates, requests and announcements the team actually reads.
Non native speakers
Write confident, idiomatic business English (or any language) without second guessing every sentence.
Job seekers and freelancers
Applications, proposals and client emails that sound professional every time.
Every language model, every app
Your writing, finally in one place
Every leading language model and the apps you already use, from Gmail to your CRM, working together in one workspace.
Why Krater
Every leading writing model, one workspace
Krater is The All-in-One AI Workspace. Email is one of hundreds of things you can do in a single chat, with 400+ AI models behind it.
Every model, one place
GPT-5, Claude, Gemini, Grok, DeepSeek, Mistral and more, all in the same chat for the same brief.
Your voice, remembered
Keep your tone, signature and preferences so every draft sounds like you from the first line.
Connected to your work
Connect Gmail, Outlook, your calendar and CRM so the email knows the thread, the meeting and the deal.
Beyond email
Continue in the same chat: summarize the reply, draft the proposal, create the slide, generate the visual.
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AI email writer FAQ
What is an AI email writer?
An AI email writer turns a short description of what you want to say into a complete email with subject line, greeting, body and sign off, in the tone you choose. You provide the context; the model handles wording and structure.
Is this AI email writer free?
Yes, your first email on this page is free and needs no account. To write unlimited emails, keep your own voice and switch between every language model, get started on Krater with a paid workspace.
Which languages does it support?
Write your brief in any language and the email comes back in that language. English, German, French, Spanish, Portuguese, Swedish, Danish, Japanese, Korean, Chinese, Arabic, Hindi and many more work well.
Which AI model writes the email?
The free email uses Gemini 2.5 Flash, a fast model with clear business writing. Inside Krater you can draft the same email with GPT-5, Claude, Gemini Pro, Grok, DeepSeek, Mistral and every other model we host.
Can it write cold sales emails?
Yes. Tell it who the recipient is, what problem you solve and the one action you want. It writes personalized outreach, not spam: bulk unsolicited or deceptive messages are against our policy.
Can it reply to an email I received?
Yes. Paste the message you received into the brief and say how you want to respond. Inside Krater you can also connect Gmail or Outlook so replies use the full thread.
How long can my brief be?
Up to 1,200 characters on this page, which is plenty for context, names, dates and the outcome you want. Inside Krater there is no practical limit and you can attach documents.
Will the email sound like me?
On this page you steer it with purpose, tone and length. Inside Krater you can save your writing style, signature and preferences so every draft sounds like you from the first line.
Do you keep my emails?
Briefs on this page are used only to produce your result and are not shown to anyone else. Inside Krater everything you write is stored in your own private workspace.
What happens after the free email?
The page shows your email and a sign up option. In Krater you get unlimited writing with 400+ AI models, plus images, video, documents and app connections in one workspace.
Write every email with every model
One workspace, 400+ AI models, email, documents, images, video and more. Get started and never face a blank draft again.