Cursus
6.0#133 in email clientsFree planFree planLinuxWindows
VisitCursus vs Spike
What both publish
| Fact | Cursus | Spike |
|---|---|---|
| Integrations | The site names Claude and Claude Code as Bridge integrations, and identifies SMTP and Resend as sending options. | Spike supports Google Drive, Dropbox, and OneDrive for cloud attachments, and its calendar feature names Google Calendar, Outlook, and Apple Calendar. |
| Privacy | The maker says Cursus has no cloud sync, telemetry, analytics, or crash reports, and blocks remote images by default to prevent tracking pixels. | Spike says it is ad-free and does not rent, sell, distribute, or monetize user data, while non-personal data may be used to improve its service. |
| Product | Cursus is a small, open source desktop email app for Windows and Linux that brings multiple accounts into one keyboard-driven client. | 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. |
| Security | Email account passwords are stored in the system keychain rather than in plain text inside the app. | Spike says message data is encrypted with AES-256 using a per-message private key and that it has periodic external security audits. |
Cursus plans
- CursusFree
Spike plans
- StarterFree
- Team$4 a month
- Business$8 a month
- FreeFree
- Pro$6 a month
- Ultimate$12 a month
Pick Cursus if…
You want what its maker publishes above — check its page for the details.
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.