Best AI Email Assistants For 2027

Last updated: November 12, 2026

The best AI email assistants for 2027 are Superhuman for speed-focused professionals, Shortwave for AI-first Gmail users, Gemini in Gmail and Copilot in Outlook for teams already on Google Workspace or Microsoft 365, and Fyxer for drafting replies in your own voice. Spark, SaneBox and Missive cover affordable, filtering and shared inbox needs.

AI email assistants sort your inbox, summarize long threads, draft replies and remind you what needs attention. The best ones learn your writing style and priorities so you spend less time in email.

Here are the leading options and who they suit.

How We Chose

We compared triage and prioritization, reply drafting quality, thread summaries, search, privacy and security, supported email providers and value for money.

AI Email Assistants At A Glance

Tool	Best For	Standout Strength
Superhuman	Executives and power users	Keyboard speed plus AI drafts and summaries
Shortwave	Gmail and Google Workspace users	AI assistant that searches and acts on your email
Gemini in Gmail	Google Workspace teams	Summaries and drafts without a new app
Copilot in Outlook	Microsoft 365 organizations	Thread summaries and coaching in Outlook
Fyxer AI	Busy professionals and founders	Auto-drafted replies and inbox sorting
Spark Mail	Individuals and small teams	Smart inbox and AI writing tools
SaneBox	Inbox overload	Moves low-priority email out of the way
Missive	Teams handling shared email	Collaboration plus AI drafting

Best AI Email Assistants For 2027

1. Superhuman — The Fastest Email Experience With AI Built In

Superhuman is built for speed, with keyboard shortcuts, split inboxes and reminders. Its AI writes replies in your voice, summarizes threads and helps you search in plain language.

It works with Gmail and Outlook accounts.

2. Shortwave — An AI-First Inbox For Gmail

Shortwave reimagines Gmail with bundles, AI summaries and an assistant that can answer questions about your inbox, draft emails and schedule meetings.

It is a strong pick for Gmail users who want AI at the center.

3. Gemini in Gmail — Google’s AI Inside The Inbox You Already Use

Gemini in Gmail summarizes threads, drafts replies and answers questions about your inbox and Drive. It is included in many Google Workspace plans.

It suits teams that want AI without changing tools.

4. Copilot in Outlook — Microsoft 365 Copilot For Email And Calendar

Copilot in Outlook summarizes threads, drafts emails, suggests tone changes and helps prepare for meetings using Microsoft 365 data.

It is the natural choice for organizations on Microsoft.

5. Fyxer AI — Drafts Replies In Your Own Voice

Fyxer organizes your inbox into categories and prepares draft replies written in your tone, ready for you to review and send. It also takes meeting notes.

It works with Gmail and Outlook.

6. Spark Mail — Affordable AI Email Across Devices

Spark offers a smart inbox, AI writing help, thread summaries and team features across Mac, Windows, iOS and Android.

It is a budget-friendly way to add AI to email.

7. SaneBox — AI Filtering That Works With Any Email Provider

SaneBox learns which messages matter and moves the rest into folders such as SaneLater, with daily digests. It works with almost any email provider.

It is ideal when the main problem is volume.

8. Missive — Shared Inboxes With AI For Teams

Missive combines shared inboxes, internal chat on threads and AI drafting and summarizing. It suits support, operations and agency teams.

Teams avoid forwarding chains and duplicate replies.

How To Choose An AI Email Assistant

Which Email Provider Do You Use?

Check support for Gmail, Outlook or IMAP. Some tools only work with Google accounts.

Do You Want A New App Or AI Inside Your Current One?

Gemini and Copilot add AI to existing inboxes. Superhuman and Shortwave replace your email client.

How Is Your Data Handled?

Review privacy policies, AI training practices and security certifications, especially for business email.

Is Speed Or Volume Your Problem?

If you get too much email, filtering tools help most. If replies take too long, drafting tools help most.

Frequently Asked Questions

What is the best AI email assistant?

Superhuman is the best overall for speed, Shortwave is best for Gmail users and Gemini or Copilot are best if your company already uses Google Workspace or Microsoft 365.

Can AI write emails in my style?

Yes. Tools like Superhuman and Fyxer learn from your sent emails to draft replies that sound like you.

Are AI email assistants safe?

Reputable tools use encryption and offer enterprise security, but review each vendor’s data and AI training policies before connecting business accounts.

Is there a free AI email assistant?

Some tools offer free tiers or trials, including Shortwave and Spark, and many Google Workspace and Microsoft 365 plans include AI features.

Conclusion

Superhuman leads for speed, Shortwave for Gmail power users and Gemini or Copilot for teams that want AI in their existing inbox.

Start with the problem you feel most, whether it is volume, triage or writing, and pick the tool that solves it.