KMail vs Spike
KMail
apps.kde.org
Spike
spikenow.comSide by side
| Figure | KMail | Spike |
|---|---|---|
| Price from | Free | $4/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| Plans published | 1 | 12 |
| Spec score · Email clients | 8.4 (#28) | 9.0 (#10) |
| AI features | Optional translation and speech-to-text features use Bergamot and vosk-api, and are disabled by default. | Spike AI can generate messages and replies, summarize conversations, and provide an AI assistant; the free tiers list 10 queries for several AI features. |
| App coverage | desktop | all |
| 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. | Spike supports Google Drive, Dropbox, and OneDrive for cloud attachments, and its calendar feature names Google Calendar, Outlook, and Apple Calendar. |
| 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 standard support for Starter, priority support for Team and Pro, and VIP support for Business and Ultimate. |
| Unified inbox | Yes | Yes |
Plans
Spike
- StarterFree
- Team$4 a month
- Business$8 a month
- FreeFree
- Pro$6 a month
- Ultimate$12 a month
- Email App FreeFree
- Teamspace StarterFree
- Teamspace Team$4 a month
- Email App Pro$6 a month
In their own words
Spike
Spike combines email, calls, notes, tasks, and to-dos in a single hub, and presents email threads as chat-like conversations. It has a unified inbox, scheduled sending, and calendar tools, and runs on Android, iOS, macOS, web, and Windows. Spike AI can draft messages and replies, summarize conversations, and provide an assistant; free tiers list 10 queries for several AI features. Teamspace adds channels, shared inboxes, groups, collaborative documents and tasks, and audio and video meetings. Spike works with existing accounts such as Gmail, Office 365 or Outlook, Exchange, iCloud, Yahoo, and other IMAP accounts. Cloud attachments can use Google Drive, Dropbox, or OneDrive, and calendars can connect with Google Calendar, Outlook, and Apple Calendar. Spike says it encrypts messages with AES-256 using a per-message private key, and undergoes periodic external security audits. The Email App Free plan includes one address, 60 days of search history, 1 GB storage, and 30 MB file uploads. Email App Pro is $6 a month billed annually; Ultimate is $12 a month billed annually.