Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
 BlueMailEmail client with a unified inbox, push mail, PGP encryption and AI. | ReviewsNone yetWrite one for BlueMail | Lowest paid plan$6per month, billed annuallyPlus, as of November 14, 2026 | Free planYes | Free trial7 days | Public APINot confirmed | Runs oniOS, Android, macOS, Windows, Linux | Main features
|
 Canary MailAn email app with AI and a built-in calendar for all your accounts in one inbox. | ReviewsNone yetWrite one for Canary Mail | Lowest paid plan$3per month, billed yearly at $36Growth, as of November 13, 2026 | Free planYes | Free trial7 days | Public APINot confirmed | ||
| eM ClientA fully-featured email client for Windows and macOS with a clean and easy-to-use interface. | ReviewsNone yetWrite one for eM Client | Lowest paid planA$79.95per yearPersonal, as of November 14, 2026 | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onWindows, macOS, Android, iOS | |
 MailbirdBring all your email accounts into one desktop app that's quick, private, and intuitive. | ReviewsNone yetWrite one for Mailbird | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onWindows, macOS, Android, iOS | Main features |
 SparkSpark takes care of your inbox and calendar so you can focus on decisions, not admin. | ReviewsNone yetWrite one for Spark | Lowest paid plan$10per user per monthPlus, as of November 13, 2026 | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onMac, Windows, iPhone, iPad, Android | |
 ThunderbirdA free email application that's easy to set up and customize. | ReviewsNone yetWrite one for Thunderbird | Lowest paid planNot confirmed | Free planYes | Free trialNot confirmed | Public APINot confirmed | Runs onWindows, Linux, macOS, Android | Main features |
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made
A tool is listed here only when we've confirmed on its own website that it has a free plan. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed