Spike
8.5#4 in email clientsFrom $4 a monthFree planAndroidiOSWebmacOS
VisitSpike vs Sylpheed
What both publish
| Fact | Spike | Sylpheed |
|---|---|---|
| App coverage | all | desktop |
| Free plan | Yes | Yes |
| Integrations | Spike supports Google Drive, Dropbox, and OneDrive for cloud attachments, and its calendar feature names Google Calendar, Outlook, and Apple Calendar. | Sylpheed can call external commands for filtering and message composition, and can work with fetchmail or procmail for receiving mail. |
| Product | Spike describes itself as an AI-powered inbox that brings email, calls, notes, tasks, and to-dos into one hub and turns email threads into chat-like conversations. | Sylpheed is a lightweight, user-friendly email client designed for beginners through power users. |
| Support | The pricing page lists standard support for Starter, priority support for Team and Pro, and VIP support for Business and Ultimate. | The Sylpheed mailing list was discontinued in 2025, and the maker points users to GitHub Issues for information sharing and bug reports. |
Spike plans
- StarterFree
- Team$4 a month
- Business$8 a month
- FreeFree
- Pro$6 a month
- Ultimate$12 a month
Sylpheed plans
- SylpheedFree
Pick Spike if…
Spike may suit people or teams looking to bring email, scheduled messages, and calendar tools together across desktop and mobile platforms. Its plans cover different email, storage, team, and file-upload needs.
Pick Sylpheed if…
You want what its maker publishes above — check its page for the details.