Softonic reported that Google Gemini Live is coming to Gmail and Keep, adding voice chat to inbox management starting summer 2026. The move confirms what the market has been signaling for a year: AI email assistants are moving from “smart compose” gimmicks to real triage and drafting agents. If you don’t want to wait for Google, the desktop field has already filled out with eight strong options that draft replies, summarize threads, and clear noise from your inbox.
We tested eight of the best AI email assistant apps on Windows, macOS, and Linux and ranked them by drafting quality, triage accuracy, and how much you have to configure before they earn their keep.
What to look for in an AI email assistant
- Reply-drafting quality. The AI should write in your voice, not a generic sales tone. Test with a real thread.
- Triage accuracy. Category detection and priority scoring should not need constant correction.
- Meeting scheduling. The best assistants read a thread and propose slots without a separate scheduler.
- Data handling. Enterprise buyers care whether the AI training uses your inbox. Check the policy before trusting it with client data.
- Cross-platform. A mail assistant that only runs in one browser tab is fragile. Native desktop apps or wide extension support matter.
- Cost per seat. Prices span $10 to $30 per seat per month. The floor and ceiling both need justification.
Quick comparison
| App | Best for | Platforms | Free plan | Starting price/mo |
|---|---|---|---|---|
| Superhuman | Speed-first power users | Mac, Windows, Web | Trial only | $30 per seat |
| Shortwave | Gmail power users who want AI-first | Mac, Windows, Linux, Web | Yes | $9 per seat |
| SaneBox | Inbox triage at any mail app | All platforms | Trial only | $7 per seat |
| Fyxer AI | Auto-reply drafting on top of Outlook or Gmail | Mac, Windows, Web | Trial only | $30 per seat |
| Ellie AI | Personalized draft writing | Web, Chrome extension | Yes | $10 per seat |
| Notion Mail | Gmail with Notion workspace tie-in | Mac, Web | Yes | $10 per seat |
| Missive | Team-shared inbox with AI drafts | Mac, Windows, Linux, Web | Yes | $14 per seat |
| Rewind AI Mail | Local-first AI with full context recall | Mac only | Yes | $19 per seat |
The best AI email assistants
1. Superhuman, best for speed-first power users
Superhuman built its reputation on keyboard-driven, near-instant Gmail on Mac and iOS. The AI layer now drafts replies in your voice, summarizes long threads, and hands you an inbox zero routine that actually holds. Their Ask AI mode answers questions across your inbox history.
Superhuman for AI email assistants is the pick if speed matters more than budget. Onboarding includes a coaching call and the shortcuts pay for themselves in a week.
Where it falls short: $30 per seat per month is the top of the range, and there is no permanent free tier. Non-Gmail providers are supported but the experience is Gmail-tuned.
Pricing:
- Free: 30-day trial
- Paid: from $30 per seat per month, annual billing
Platforms: macOS, Windows, iOS, Android, Web
Download: Superhuman
Bottom line: Perfect for executives, founders, and sales leads who process high volume daily. Skip if you cannot justify $30 per seat.
2. Shortwave, best AI-first Gmail client
Shortwave is the AI-first Gmail alternative built by ex-Google Inbox engineers. Threads collapse into readable summaries, AI drafts reply cleanly using your history, and the “AI assistant” panel answers cross-inbox questions.
Shortwave for AI email assistants is the pick for Gmail users who want more automation than Google itself ships. It sits on top of Gmail so nothing breaks.
Where it falls short: Gmail only. Non-Gmail accounts have to route through workarounds or move.
Pricing:
- Free: basic tier with limited AI
- Paid: from $9 per seat per month for full AI
Platforms: macOS, Windows, Linux (Web), iOS, Android
Download: Shortwave
Bottom line: Perfect for Gmail power users who want AI-first workflow at a fraction of Superhuman’s price.
3. SaneBox, best triage layer for any mail app
SaneBox does not replace your mail app. It sits on top of it (Apple Mail, Outlook, Gmail, whatever) and triages incoming messages into SaneLater, SaneNews, SaneBulk, and other folders. The AI learns from what you open and what you snooze.
SaneBox for AI email assistants wins on portability. You don’t switch clients; you get intelligence added underneath.
Where it falls short: No drafting or reply help. Purely a triage and cleanup layer.
Pricing:
- Free: 14-day trial
- Paid: from $7 per seat per month, annual billing
Platforms: Mail-app-agnostic (Windows, macOS, Linux, mobile)
Download: SaneBox
Bottom line: Perfect if you love your current mail client and just want an AI triage brain. Skip if you want drafting help.
4. Fyxer AI, best drafting layer on top of Outlook or Gmail
Fyxer AI works as an add-on to Outlook and Gmail. It writes reply drafts in your voice using your past emails as context, and it can auto-categorize inbound messages. The drafts sit in your Drafts folder waiting for review.
Fyxer AI for AI email assistants suits people who write long-form business emails and want a draft ready when they open a thread.
Where it falls short: $30 per seat per month sits at the Superhuman tier without the full client experience.
Pricing:
- Free: 7-day trial
- Paid: from $30 per seat per month
Platforms: Windows, macOS, Web (via extension)
Download: Fyxer AI
Bottom line: Perfect for consultants and sales reps who write dozens of custom replies a day. Skip if you don’t want a Superhuman-tier bill.
5. Ellie AI, best personalized draft writing
Ellie AI is a lightweight draft writer that lives as a Chrome extension. It learns your writing style from sample emails you feed it, then generates first drafts you can accept, edit, or throw out. Fast, focused, no other features.
Ellie AI for AI email assistants is the pick for writers who want draft speed without changing clients.
Where it falls short: Chrome extension only. No triage, no scheduling, no summaries.
Pricing:
- Free: limited monthly drafts
- Paid: from $10 per seat per month
Platforms: Chrome extension (Windows, macOS, Linux)
Download: Ellie AI
Bottom line: Perfect for solo operators who want fast drafts and nothing else. Skip if you need inbox triage.
6. Notion Mail, best for Notion workspace users
Notion Mail is Notion’s AI-first Gmail client, designed to integrate with your Notion workspace. Emails link into Notion pages, and the AI draft assistant knows about your projects.
Notion Mail for AI email assistants only makes sense if you already live in Notion. Otherwise the workspace integration is dead weight.
Where it falls short: Gmail only, Mac-first, and Windows support lags. Non-Notion users pay for features they won’t touch.
Pricing:
- Free: with a Notion account
- Paid: AI features from $10 per seat per month
Platforms: macOS, Web, iOS
Download: Notion Mail
Bottom line: Perfect for Notion power users who want their inbox to speak to their workspace. Skip everywhere else.
7. Missive, best team-shared inbox with AI
Missive is a team inbox where multiple people work the same mailbox with internal chat threads attached to each conversation. The AI drafts, summarizes, and translates inside threads.
Missive for AI email assistants stands out on collaboration. Teams handling support or sales as a shared inbox get real value from the format.
Where it falls short: Solo users pay for team features they don’t need.
Pricing:
- Free: basic inbox with limits
- Paid: from $14 per seat per month for AI
Platforms: macOS, Windows, Linux, Web, iOS, Android
Download: Missive
Bottom line: Perfect for support and sales teams working a shared inbox. Skip if you work alone.
8. Rewind AI Mail, best local-first AI with full context
Rewind AI Mail takes the “AI has your full context” pitch and runs it locally on Mac. It indexes every email, every meeting, every website you visited, and drafts replies with all of that in scope. No cloud training on your data.
Rewind AI Mail for AI email assistants wins on privacy. Local-first is genuinely rare in this category.
Where it falls short: Mac only. Requires strong hardware for indexing and can consume real disk space.
Pricing:
- Free: limited local index
- Paid: from $19 per seat per month
Platforms: macOS (Apple Silicon recommended)
Download: Rewind AI
Bottom line: Perfect for Mac users who want AI with full context but keep data local. Skip on Windows or Linux.
How to pick the right one
- If you want the fastest inbox on the planet: Superhuman
- If you live in Gmail and want AI without the price: Shortwave
- If you love your current mail app and only want triage: SaneBox
- If you write long custom replies daily: Fyxer AI
- If you write a lot but need draft help only: Ellie AI
- If your team lives in Notion: Notion Mail
- If your team works a shared inbox: Missive
- If privacy and local-first matter more than anything: Rewind AI Mail
FAQ
What is the best AI email assistant in 2026?
Superhuman for speed-first power users, Shortwave for Gmail users who want AI depth at a lower price. Both lead their brackets clearly.
Does Gmail have a built-in AI assistant?
Gmail integrates Gemini for smart compose and reply. Gemini Live voice chat rolls out to Gmail and Keep in summer 2026. Third-party assistants like Shortwave and Superhuman still outperform on triage and drafting.
Are AI email assistants safe with sensitive email?
Depends on the vendor. Rewind AI Mail runs locally on Mac. Enterprise-oriented Superhuman and Missive offer data handling terms. Read the training-on-data clause before piping client email through any assistant.
Which AI email assistant works with Outlook?
SaneBox, Fyxer AI, and Missive all support Outlook. Superhuman supports Outlook via connector. Shortwave and Notion Mail are Gmail-only.
Is there a free AI email assistant?
Shortwave, Ellie AI, Notion Mail, Missive, and Rewind AI Mail all offer free tiers, though AI features are limited. SaneBox, Superhuman, and Fyxer AI are trial-only.
