Guerrilla Mail review
A free disposable inbox service with custom addresses, sending, APIs, and domains.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Guerrilla Mail is a web-based disposable email service for people who want temporary inboxes without registration. It generates disposable addresses, lets users choose an address, receives incoming messages, and supports email composition and sending. Its Scrambled Address feature adds another address option for users seeking additional privacy. The service is aimed at short-lived signups, inboxes, and communications where avoiding spam matters more than retaining mail.
The free plan covers the core disposable-email workflow: creating a temporary inbox, choosing an address, viewing incoming messages, deleting messages, and sending email. According to the published plan details, delivered email is deleted after one hour, so the service fits brief email exchanges rather than ongoing correspondence or archival needs. The paid Custom domain plan costs $9.99 USD per year and allows use of a customer-owned domain with Guerrilla Mail. That keeps the pricing structure straightforward, with the main paid addition focused on domain ownership.
Guerrilla Mail also stands out for its public JSON API, available for mailbox creation and email retrieval. This gives developers a documented way to connect temporary mailboxes to software workflows, while the web interface remains available for direct access. Choose it if you need disposable addresses, user-selected mailbox names, sending, API access, or a customer-owned domain at a low annual price. Choose another type of email service if your priority is keeping messages longer than one hour or managing persistent mailboxes.
Guerrilla Mail pros and cons
- Where it wins
- Free inboxes without registration
- Public JSON API for mailbox creation and retrieval
- Customer-owned domains for $9.99 per year
- Where it doesn't
- Delivered email is deleted after one hour
- Custom-domain support is paid annually
- Temporary inboxes are not suited to persistent email storage
Guerrilla Mail fact sheet, pricing and score →
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