Updated July 2026 · 8 min read

AI Email Writing Tools: What Works and How to Sound Human

Business email is the AI writing use case with the most obvious ROI and the most identifiable pitfall. The ROI: reduce the 20-30 minutes per week spent on difficult email drafting to 5 minutes. The pitfall: AI email sounds like AI email, which signals low effort to sophisticated recipients.

Tools worth knowing

Superhuman's AI Compose: Built directly into the Superhuman email client. Type a few bullet points about what you want to say and it drafts the email. Strongest for people who already use Superhuman ($30/month) and want to reduce drafting time for routine business correspondence. The model is good but not superior to prompting Claude or ChatGPT directly.

Gmail's Smart Reply and Smart Compose: The free option already in your inbox. Smart Compose predicts the next words as you type. More useful for short replies than substantive composition.

Lavender: An AI email coaching tool primarily designed for sales emails. It scores your email and suggests improvements to response rate. More useful for cold outreach than general business correspondence.

Claude or ChatGPT via browser: More control, lower cost, better quality for non-routine emails. Write a one-paragraph description of the email context and what you need to communicate, then specify tone and length. Edit the output before sending.

A framework for prompting AI email drafts

The less context you give AI, the more generic the output. Include: who you're writing to (their role, your relationship, context), what you need to communicate (the key points, not just the topic), the desired outcome from the email, and any constraints (keep it under 150 words, avoid jargon, be direct not soft).

Example prompt: "Draft a short email to my web designer. We worked together last year on my portfolio site. I need to let her know I'd like to revive the project we paused in March, understand her current availability, and ask if her rates have changed. Keep it under 100 words, casual and direct, no filler phrases."

The three mandatory human edits

Opening line: Replace any generic opener with something specific to the person or situation. "Following up on our March conversation about the navigation redesign" is better than "I hope you're doing well."

The ask: Make sure the specific request is unmistakably clear and has one call to action, not three. AI drafts often bury the ask in the middle or hedge it with multiple options.

Closing: Remove any AI-generated closing filler and end with your natural signoff. "Looking forward to connecting" can stay if it's accurate. "Please don't hesitate to reach out should you have any questions" should always go.