Spike
8.5#4 in email clientsFrom $4 a monthFree planAndroidiOSWebmacOS
VisitSpike vs SquirrelMail
SquirrelMail
6.1#127 in email clientsFree planFree planWebSelf-hosted
VisitWhat both publish
| Fact | Spike | SquirrelMail |
|---|---|---|
| App coverage | all | web |
| Calendar tools | Yes | Yes |
| Free plan | Yes | Yes |
| Security | Spike says message data is encrypted with AES-256 using a per-message private key and that it has periodic external security audits. | The security page lists a 2025 XSS vulnerability affecting versions through 1.4.23-svn-20250401 and 1.5.2-svn-20250401. |
| Support | The pricing page lists standard support for Starter, priority support for Team and Pro, and VIP support for Business and Ultimate. | The project directs end users and system administrators to different support resources and also links to commercial support. |
Spike plans
- StarterFree
- Team$4 a month
- Business$8 a month
- FreeFree
- Pro$6 a month
- Ultimate$12 a month
SquirrelMail plans
- SquirrelMailFree
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 SquirrelMail if…
You want what its maker publishes above — check its page for the details.