Top 10 AI Email Assistants in 2026 (Save Hours Daily)

Spend Less Time on Email

The average professional spends 28% of their workday on email. AI email assistants cut this dramatically by drafting replies, categorizing messages, summarizing threads, and managing follow-ups. Here are the 10 best AI email tools in 2026.

The Top 10

#	Tool	Best For	Works With	Price
1	Gmail AI (Gemini)	Smart compose & summaries	Gmail	Free / $7 mo
2	Microsoft Copilot	Draft & summarize in Outlook	Outlook	$30/mo
3	Grammarly	Grammar & tone in email	Gmail, Outlook	Free / $12 mo
4	SaneBox	AI inbox organization	Any email client	$7/mo
5	Superhuman	Speed + AI for power users	Gmail, Outlook	$30/mo
6	Lavender	Sales email optimization	Gmail, Outlook	Free / $29 mo
7	Shortwave	AI-first email client	Gmail	Free / $9 mo
8	Compose AI	Sentence autocomplete	Gmail	Free / $13 mo
9	Mailbutler	Email tracking + AI	Gmail, Outlook, Apple Mail	$15/mo
10	Boomerang	Smart scheduling + AI	Gmail, Outlook	Free / $5 mo

1. Gmail AI (Gemini) — Built-In Intelligence

Google’s built-in AI in Gmail offers smart compose (predictive text as you type), email summaries for long threads, suggested replies, and the ability to draft full emails from a brief description. Free for basic features; Google One AI Premium ($7/mo) unlocks Gemini Advanced integration.

2. Microsoft Copilot — Enterprise Email AI

Copilot in Outlook drafts emails, summarizes threads, catches you up on missed conversations, and suggests responses. It understands your organization’s context and can reference data from Teams, SharePoint, and other Microsoft 365 apps. The most powerful option for enterprises using Microsoft.

3. Grammarly — Perfect Every Email

Grammarly ensures every email is grammatically correct, professionally toned, and clearly written. The Chrome extension works in Gmail and Outlook web. Premium features include full sentence rewrites and formality adjustment.

4. SaneBox — AI Inbox Organization

SaneBox uses AI to sort your inbox automatically. Important emails stay in your inbox; newsletters, notifications, and low-priority messages go to separate folders. It learns your preferences over time and gets smarter. Works with any email client — no app changes needed.

5. Superhuman — Speed + AI

Superhuman combines the fastest email client with AI features. Write full emails from a few words, get instant summaries, and process your inbox at record speed. The $30/month price is steep but justified for executives and sales professionals handling 100+ emails daily.

6-10. Sales & Specialized Tools

Lavender optimizes sales emails with real-time scoring. Shortwave is an AI-native Gmail client with intelligent search. Compose AI provides sentence-level autocomplete. Mailbutler adds tracking and AI to multiple email clients. Boomerang handles smart scheduling and follow-up reminders.