SMTPy vs SimpleLogin — when does each one make sense?
SimpleLogin (now part of Proton) is the most popular email-aliasing service for individuals — and it's a great product. SMTPy overlaps in the basics and pulls ahead specifically when you need teams, self-hosting, or developer integrations. This page is honest about both — pick whichever fits your use case.
| Feature | SMTPy | SimpleLogin |
|---|---|---|
| Unlimited aliases | ✓ | ✓ (Premium) |
| Custom domains | Up to 100 (Business) | Up to 30 (Premium) |
| Catch-all per domain | ✓ | ✓ |
| Browser extension | — (planned) | ✓ Chrome/Firefox/Safari |
| Mobile app | — (planned) | ✓ iOS / Android |
| Self-hostable | ✓ Full feature parity | ✓ Open-source server |
| EU jurisdiction | ✓ FR | ✓ CH (Proton) |
| Shared inbox for teams | ✓ True multi-user shared inbox | — Per-user only |
| — This is the structural differentiator. SimpleLogin/Proton would need to rebuild around the user model to support this. | ||
| Outbound webhooks | ✓ HMAC + retry | — |
| Transactional send API | ✓ POST /send | — |
| DMARC report ingestion | ✓ | — |
| Filter rules engine | ✓ 8+ conditions × 5 actions | ✓ Basic |
| Pricing — individual | Free / €9 Pro | Free / $4 Premium |
| Pricing — business | €29 Business | Proton Business plans |
When to pick which
Pick SimpleLogin if you're an individual who wants the most polished mobile + browser experience and you're already in the Proton ecosystem. Pick SMTPy if you're a team that needs a shared inbox, or a developer who wants webhooks + transactional send, or anyone serious about self-hosting (we ship one Docker compose with full feature parity).