Email and inbox tools
AI email tools sort incoming mail, summarise long threads and draft replies in your voice. Some are complete email apps; others work on top of Gmail or Outlook without changing how you read mail.
Superhuman Mail
AI email app for teams that use Gmail or Outlook
Shortwave
AI email client for Gmail and Google Workspace accounts
SaneBox
Email filtering service that sorts less important mail into separate folders
Spark Mail
Cross-platform email app with a smart inbox, AI writing and team features
Side by side
| Tool | Free plan | Starting price | Open source | Platforms |
|---|---|---|---|---|
| Superhuman Mail | $25/user/mo (annual) | No | macOS, Chrome extension | |
| Shortwave | $18/user/mo | No | Web, macOS, Windows, iOS | |
| SaneBox | $5.42/mo (annual) | No | iOS, Android | |
| Spark Mail | $8.25/user/mo (annual) | No | macOS, Windows, iOS, Android |
How to choose
- 1
Does it support your provider: Gmail, Google Workspace, Outlook or Microsoft 365?
- 2
Do you want a new email app, or help inside the one you use?
- 3
Which AI features are on each plan, and is there a free tier?
- 4
What access does it need to your mailbox, and what does it store?
Also worth a look
Tools listed elsewhere that do this job too.
Lindy
AI assistant that works in Slack, email and meetings to handle routine tasks
Questions
What are AI email and inbox tools?
AI email tools sort incoming mail, summarise long threads and draft replies in your voice. Some are complete email apps; others work on top of Gmail or Outlook without changing how you read mail.
Which AI email and inbox tools have a free plan?
Of the 4 listed here, 2 have a free plan: Shortwave and Spark Mail. Free plans are limited; each tool's page lists the limits.
Which of these AI email and inbox tools costs least to start?
Of the tools here with a published price, the lowest entry price is SaneBox's Snack plan at $5.42/mo billed annually, as published on its pricing page on 23 September 2026. The cheapest plan is not always the best value: check what each plan includes.