Cleanbox vs SimpleLogin.
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 comparison
| 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) |
Where SimpleLogin wins
- Send and reply from aliases (full two-way)
- Open source and auditable
- Browser extension for instant alias creation
- Included free with Proton Unlimited plan
- Generous free tier (10 aliases, no volume limit)
Where Cleanbox wins
- Yes: spam filtering — forwards everything, including spam
- Yes: contact management or sender categorization
- Yes: Shield (rate limiting, scheduling, gatekeeper)
- Yes: MX relay for existing business addresses
- Yes: virus scanning
Who should choose SimpleLogin?
Privacy-focused users who need two-way alias communication. Ideal if you are already in the Proton ecosystem.
Who should choose Cleanbox?
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.
Try Cleanbox free
3 aliases, spam filtering, contact management, and Shield — no credit card required.
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