MailFlow
7.3#37 in email clients$500 one-timeFree planWebSelf-hosted
VisitMailFlow vs Spike
What both publish
| Fact | MailFlow | Spike |
|---|---|---|
| App coverage | web | all |
| Calendar tools | No | Yes |
| Free plan | Yes | Yes |
| Product | MailFlow is a self-hosted, open-source webmail client that combines email accounts in a browser interface. | 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. |
| Scheduled sending | No | Yes |
| Security | The site says stored email credentials are encrypted at rest with AES-256 and lists bcrypt password hashing, TOTP two-factor authentication, rate-limited authentication, and sanitized email HTML. | Spike says message data is encrypted with AES-256 using a per-message private key and that it has periodic external security audits. |
| Support | The free personal plan includes community support; the commercial license includes direct email for questions, feedback, and business enquiries. | The pricing page lists standard support for Starter, priority support for Team and Pro, and VIP support for Business and Ultimate. |
| Unified inbox | The unified inbox displays connected accounts in a single chronological feed. | Yes |
MailFlow plans
- Personal & Open SourceFree
- Business Use$500, paid once
Spike plans
- StarterFree
- Team$4 a month
- Business$8 a month
- FreeFree
- Pro$6 a month
- Ultimate$12 a month
Pick MailFlow 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.