Best AI tools for writing emails
If you write a lot of email, an AI assistant can draft replies, fix tone and tidy grammar in seconds. These are the tools that do it well, and what each is best at.
Updated Sep 26, 2026 · 3 tools compared
| Tool | Best for | Pricing | Link |
|---|---|---|---|
| ChatGPT | Drafting and rewriting everyday text | Freemium | Visit |
| Claude | Summarising and questioning long documents | Freemium | Visit |
| Grammarly | Proofreading emails and documents | Freemium | Visit |
1. ChatGPT
ChatGPT is OpenAI's chat assistant. You describe what you need in plain language and it drafts, rewrites, explains or brainstorms with you. It handles a wide spread of everyday jobs: emails, outlines, summaries, study help and quick coding questions.
Best for: drafting and rewriting everyday text, brainstorming ideas and outlines, quick explanations and summaries.
Worth knowing: Check facts and figures it gives you before relying on them, especially for recent events.
2. Claude
Claude is Anthropic's AI assistant. It is often chosen for working through long documents, careful writing and editing, and help with code. You can upload files and ask it to summarise, compare or rewrite them.
Best for: summarising and questioning long documents, careful drafting and editing, coding help.
Worth knowing: Like any assistant, it can be wrong. Verify important details against the source.
3. Grammarly
Grammarly checks spelling, grammar and clarity as you write in the browser, email and documents, and suggests changes to tone. Its AI features can also rewrite or draft short passages.
Best for: proofreading emails and documents, adjusting tone, writing in a second language.
Worth knowing: Review suggestions rather than accepting them all; it can flatten your voice.
Questions
Can AI write emails for me?
Yes. Assistants like ChatGPT and Claude draft full emails from a short description, and Grammarly polishes emails as you type. Always read the draft before sending.
Which is best for proofreading?
Grammarly is built for proofreading and tone as you type. ChatGPT and Claude are better when you need a whole draft written or rewritten.