Guerrilla Mail
Guerrilla Mail: A free disposable inbox service with custom addresses, sending, APIs, and domains. Ranked #10 of 24 in Disposable Email Services by our editors (8.0/10); pricing: Free plan; best for custom-address users needing API access.
At a glance
- Editor score8.0 / 10
- PricingFree plan
- Best forCustom-address users needing API access
- Free planYes
- Paid from$9.99/yr
- Inbox lifetimeHours
- Facts checked20 Sep 2026
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
Our verdict on Guerrilla Mail
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.
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Guerrilla Mail pricing
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Guerrilla Mail fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $9.99/yr |
| Inbox lifetime | Hours |
| Custom address | Yes |
| API access | Yes |
| Custom domain | Yes |
| Attachments supported | Not verified |
| Max active inboxes | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan (source) |
| Website | guerrillamail.com |
| Facts checked | 20 Sep 2026 |
Alternatives to Guerrilla Mail
- MailinatorA strong fit for automated inbox testing, with private domains and API-driven workflows.9.2
- Temp Mail APIA developer-focused disposable email service with strong parsing and automation support.9.0
- SecureTempMailA flexible disposable inbox service with automation features and a developer plan.8.8
See all Guerrilla Mail alternatives →
Also Ranked In
Guerrilla Mail is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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