AI for Email: Best Tools for Gmail, Outlook, and Standalone (2025)
Best AI Email Tools in 2025
The average professional sends 40+ emails daily. AI email tools can draft responses, prioritize your inbox, and help you communicate more effectively.
TL;DR: Superhuman for the fastest email experience with AI. Spark for the best free AI email client. ChatGPT/Claude for writing individual emails. Gemini for Gmail users. Microsoft Copilot for Outlook users.
Top AI Email Tools
AI Email Clients
- Superhuman ($30/mo) — Premium email client with AI: instant replies, scheduling, follow-up reminders. The fastest email experience available.
- Spark ($8/mo/user) — AI email client with Smart Inbox, AI writing, and team features. More affordable than Superhuman.
AI Writing for Email
- Claude ($20/mo) — Best quality email writing. Paste context and get polished, professional emails.
- ChatGPT ($20/mo) — Good for generating multiple email variations and brainstorming subject lines.
- Grammarly (Free/$12/mo) — Real-time email editing in Gmail and Outlook.
Platform-Integrated AI
- Google Gemini in Gmail (Free/$20/mo) — Draft replies, summarize threads, and search across emails. Built into Gmail.
- Microsoft Copilot in Outlook ($30/mo) — AI summaries, draft generation, and scheduling in Outlook.
Comparison
| Tool | Best For | Free? | Price |
|---|---|---|---|
| Superhuman | Power users | Trial | $30/mo |
| Spark | Teams | Yes | Free/$8 |
| Claude/ChatGPT | Writing quality | Yes | Free/$20 |
| Gemini in Gmail | Gmail users | Yes | Free/$20 |
Full guide: AI email writing tools. Productivity: AI productivity tools.
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