Side by side
EmptyInbox vs Guerrilla Mail
Both stand on temporary email services. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxWeb
EmptyInbox is oriented toward automated workflows that need temporary incoming email, with both API and web access. Its seven-day retention and lack of sending capability are important constraints to account for.
Visit EmptyInbox
Free plan Open source AndroidAPIExtension+2
Guerrilla Mail provides short-lived disposable inboxes, custom addresses, API access and a free plan. Users should understand the Inbox ID access warning and the limited message lifetime before relying on it.
Visit Guerrilla MailThe facts
| EmptyInbox | Guerrilla Mail | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Yes |
| Runs on | API, Linux, Web | Android, API, Extension, Self-hosted, Web |
| Lowest paid plan | See the plans | Custom domain: $9.99 a year |
| Plans published | 5 | 2 |
| Maker | Not published | Not published |
| Website | emptyinbox.me | guerrillamail.com |
| On temporary email services | #5 of 33 | #1 of 33 |
EmptyInbox: what it does well
- A separate inbox can be created for each task.
- REST API and MCP access on the free plan.
- Reading and listing messages are free.
- Paid credits do not expire.
What to know first
- Messages are deleted after seven days.
- The service cannot send email.
- Inbox creation consumes credits.
- Quota purchases are non-refundable.
Guerrilla Mail: what it does well
- Free plan available
- No registration required for an address
- Custom addresses and domains supported
- Public JSON API available
- Includes a password manager
What to know first
- Inbox messages last only one hour
- Anyone knowing an Inbox ID may access it
- API rate limits are unpublished
- Custom domain costs $9.99 a year
Alternatives to EmptyInbox Alternatives to Guerrilla Mail The whole list