The best AI tools for email help you draft, reply and manage your inbox faster. Gemini in Gmail and Copilot in Outlook lead, with ChatGPT for standalone drafting.
At a glance
| Tool | Best for |
|---|---|
| Gemini (Gmail) | Gmail drafting + replies |
| Microsoft Copilot (Outlook) | Outlook |
| ChatGPT | Standalone drafting |
| Grammarly | Tone + polish |
Prices are USD and current as of June 2026 — verify on the official page.
The top picks
- Gemini (Gmail) — AI help built into Gmail.
- Microsoft Copilot (Outlook) — AI drafting and summaries in Outlook.
- ChatGPT — draft any email, then paste it in; free tier.
- Grammarly — tone and clarity across your email.
How to choose
If you use Gmail, Gemini’s built-in help is easiest; for Outlook, Copilot. ChatGPT works for standalone drafting regardless of provider, and Grammarly polishes tone. Review AI-drafted emails before sending — tone and facts need a human check, especially for important or sensitive messages.
If you find yourself juggling a separate subscription for chat, automation, transcription and image generation, one option worth knowing is a single platform that runs them together — osFoundry is one such agentic AI platform that consolidates chat, agents and internal apps in one workspace, with a bring-your-own-key model so you choose the underlying AI.
Related reading
This article is general information, not professional, legal or financial advice. AI tools, prices and availability change fast — verify current details on the official source before you rely on them.