The 9 best AI email assistants

By Miguel Rebelo · August 5, 2025

Email is a digital hydra. For each one you bat out of your inbox, two others take its place. Wouldn't it be great if AI could be your personal email Hercules?

The competition for the best AI email assistant software is in full swing. You'll find powerful options that'll help you write emails, improve communication, sort through conversations, or burn a stack of junk mail in a flash.

The best AI email assistants

What can AI bring to email?

AI still isn't ready to work unsupervised—but it's a great tool to shave minutes off of every message through organization, insights, writing assistance, and automation.

Here are areas where AI can help you do email better:

Processing email content

  • Run sentiment and intent analysis on the message.
  • Generate a set of tags to sort incoming emails.
  • Summarize the email or entire email thread.
  • Optimize your inbox usage by having AI analyze usage and messaging partners.
  • Get coaching on your email draft.
  • Detect data types and extract actions or tasks.

Business intelligence and enrichment

AI can use pattern recognition to surface relevant information and gather all related tasks, documents, and contacts from your email threads. This is useful for project managers to compare project statuses over time.

Automatic replies, writing, and rewriting

AI email assistants often provide generative AI features for replying and composing messages. They may also offer multi-language support and simplify the replying process via integrations.

Multimodality

AI enables the use of voice to manipulate text and vice versa, although this is less common in AI email assistants.

What makes the best AI email assistant software?

How we evaluate and test apps

  • Easy email integration.
  • Inbox management. App should support personal inbox management.
  • AI features. Examples include sentiment analysis, intent detection, or data extraction.
  • Productivity and automation. Other settings to help you save time and maintain inbox zero.
  • Data privacy. Understanding of security policies for user data.

I filtered out those that merely integrated generative AI and selected a smaller, more reliable subset of email assistants after thorough testing.

The best AI email assistants at a glance

Best for Standout features Pricing
Shortwave Search Flexible AI assistants; deep integration with Google Calendar Free; paid from $14/user/month
Microsoft Copilot Pro for Outlook Improving communication Unlocks features in other Microsoft apps Microsoft 365 required, starting at $4.75/month
Gemini for Gmail Google Workspace users Seamless integration From $7/user/month
Apple Intelligence for Apple Mail Apple users AI runs locally Free
Superhuman AI with templates Great keyboard shortcuts From $25/user/month
Notion Mail Inbox filtering Granular filtering Free; from $20/month
Proton Scribe Privacy Zero-knowledge service $19.99/month
Edison Mail Security Runs on device From $14.99/month
SaneBox Inbox organization Priority categorization From $4.13/month

Other AI email assistants to watch

  • Mailytica: Focused on customer service by using AI to manage emails at scale.
  • EmailTree: Offers advanced automation features for customer support teams.

Simplify email with Zapier

You can also create custom AI email workflows using Zapier. Examples include automatically writing business emails or generating summaries. Here’s a template to get started: AI Email Assistant Template. Related reading: Best AI scheduling assistants.

Miguel Rebelo is a freelance writer based in London, UK. He loves technology, video games, and huge forests.