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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 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.

Visit SimpleLogin

Try Cleanbox free

3 aliases, spam filtering, contact management, and Shield — no credit card required.

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