SimpleLogin, acquired by Proton in 2022, is an open-source email alias service focused on privacy. It lets you create aliases that can both send and receive email and integrates tightly with the Proton ecosystem (ProtonMail, ProtonVPN, Proton Pass).
| Feature |  Cleanbox |
SimpleLogin |
|---|---|---|
| Email aliases | ||
| Spam filtering | ||
| Contact management | ||
| Custom domains | ||
| MX relay (gateway) | ||
| Virus scanning (ClamAV) | ||
| IP blacklist checking | ||
| Shield protection | ||
| Custom filter rules | ||
| Quarantine zone | ||
| Delivery scheduling | ||
| Rate limiting | ||
| One-click unsubscribe | ||
| Contact categories (20) | ||
| Cloud attachment storage | ||
| Team collaboration | ||
| REST API | ||
| Open source | ||
| Browser extension | ||
| Catch-all addresses | ||
| Free tier | 3 aliases, 50/week | 10 aliases, unlimited emails |
| Paid from | $5/month | $4/month ($36/year) |
Privacy-focused users who need two-way alias communication. Ideal if you are already in the Proton ecosystem.
Cleanbox is the better choice if you need spam filtering before delivery, contact management with 20 automatic categories and 5 contact states, Shield protection (rate limiting, delivery scheduling, gatekeeper), or MX relay for existing business email addresses with virus scanning.
3 aliases, spam filtering, contact management, and Shield — no credit card required.
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