KMail vs Spark Mail
KMail
apps.kde.org
Spark Mail
sparkmailapp.comSide by side
| Figure | KMail | Spark Mail |
|---|---|---|
| Price from | Free | $8.25/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| Plans published | 1 | 6 |
| Spec score · Email clients | 8.4 (#28) | 9.1 (#6) |
| AI features | Optional translation and speech-to-text features use Bergamot and vosk-api, and are disabled by default. | Spark +AI can translate, summarize, draft, and proofread emails, while AI Assistant can find, summarize, and take action on emails, attachments, meeting notes, and events. |
| Calendar tools | Yes | Yes |
| Free plan | Yes | Yes |
| Integrations | KMail connects with KOrganizer for meeting invitations and KAddressBook for address completion, avatars, and cryptographic preferences. | Listed integrations include Asana, Evernote, Google Drive, Microsoft Teams, Notion, Slack, Todoist, Trello, and Zoom, with availability varying by platform. |
| Offline access | Yes | Yes |
| Scheduled sending | Yes | Yes |
| Support | KDE lists the KMail Handbook, forum, user mailing list, and Libera.Chat channel as help options. | The pricing page lists self-service support, priority support, and dedicated customer success manager support, depending on plan. |
| Unified inbox | Yes | Yes |
Plans
Spark Mail
- FreeFree
- Plus$10 a month
- Pro$20 a month
- Plus$99 a year
- Pro$199 a year
- EnterprisePriced on request
In their own words
Spark Mail
Spark Mail is an email app for Android, iOS, macOS, and Windows that helps users focus on important messages. Smart Inbox separates priority mail from other messages, while a unified inbox brings multiple accounts together. It supports IMAP, iCloud, Exchange, Outlook, Yahoo, and Google accounts, as well as offline access, scheduled sending, and calendar tools. Teams can collaborate on email in real time, add private comments and shared information, delegate ownership, track progress, and set deadlines. Spark +AI can translate, summarize, draft, and proofread email; AI Assistant can find information and take action across emails, attachments, meeting notes, and events. AI is disabled by default, and AI features have plan-based monthly quotas. Listed integrations include Asana, Evernote, Google Drive, Microsoft Teams, Notion, Slack, Todoist, Trello, and Zoom, with availability varying by platform. The free plan includes unlimited accounts, Smart Inbox, Smart Notifications, essential email productivity, and Calendar. Plus costs $10 a month per user, and Pro costs $20 a month per user. A 7-day Plus and Pro trial is available when subscribed to directly in the app.