Best AI for email (April 2026)

The ranking

1. #1 Superhuman AI

   Fastest email client + the best AI summary and reply suggestions.

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2. #2 Shortwave

   Strongest AI search across your full inbox history. Gmail-native.

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3. #3 Fyxer

   Auto-drafts replies in your tone overnight. Best for executives drowning in email.

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4. #4 Shortwave

   Best AI email client for Gmail. Searches your inbox semantically, summarizes threads, drafts replies in your voice. Closest thing to a real email assistant.

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5. #5 Superhuman AI

   Best for power users. AI rewrite, instant reply suggestions and triage on top of the fastest email client built. $30/mo, worth it for inbox-heavy roles.

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6. #6 Spike

   Best chat-style inbox with AI. Treats email as conversations + AI drafting. Strong for teams who hate formal email.

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7. #7 Hey AI

   Best opinionated email. Basecamp's redesign with built-in AI summaries and screening. The choice for people who want fewer emails, not better ones.

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8. #8 Sanebox

   Best for AI triage without changing clients. Sits on top of any IMAP inbox, learns what's important, hides the rest. Battle-tested for 10+ years.

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9. #9 Mailmaestro

   Best for Outlook users. AI drafting and reply suggestions inside Outlook. The enterprise pick where Gmail tools don't apply.

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10. #10 Notion Mail

    Best for Notion-native teams. Brings Notion's database structure to inbox triage. Promising newcomer if your work already lives in Notion.

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Quick comparison

The analysis

Superhuman AI is the right pick for executives who need fast triage and on-brand drafts. Shortwave is the most ambitious — it runs your inbox closer to autopilot than anything else. Microsoft 365 Copilot wins for enterprise Outlook deployments. Spike AI for teams who treat email as chat.