# Email on Acid alternatives

The highest-scoring alternative to Email on Acid in Email Testing Dev is **Testmail.app** (82/100), against Email on Acid's 58/100. Ranked on independent signals, not user reviews. No vendor pays for placement.

| # | Alternative | Score | Confidence | Compare |
|--:|---|--:|---|---|
| 1 | [Testmail.app](https://www.vioscale.ai/software/testmail-app) | 82 | 42% (low) | [Email on Acid vs Testmail.app](https://www.vioscale.ai/compare/email-on-acid-vs-testmail-app) |
| 2 | [Maildev](https://www.vioscale.ai/software/maildev) | 64 | 24% (low) | [Email on Acid vs Maildev](https://www.vioscale.ai/compare/email-on-acid-vs-maildev) |
| 3 | [Mailosaur](https://www.vioscale.ai/software/mailosaur) | 61 | 55% (medium) | [Email on Acid vs Mailosaur](https://www.vioscale.ai/compare/email-on-acid-vs-mailosaur) |
| 4 | [GreenMail](https://www.vioscale.ai/software/greenmail) | 58 | 31% (low) | [Email on Acid vs GreenMail](https://www.vioscale.ai/compare/email-on-acid-vs-greenmail) |
| 5 | [MailSlurp](https://www.vioscale.ai/software/mailslurp) | 50 | 54% (medium) | [Email on Acid vs MailSlurp](https://www.vioscale.ai/compare/email-on-acid-vs-mailslurp) |
| 6 | [MailHog](https://www.vioscale.ai/software/mailhog) | 43 | 19% (low) | [Email on Acid vs MailHog](https://www.vioscale.ai/compare/email-on-acid-vs-mailhog) |
| 7 | [Litmus](https://www.vioscale.ai/software/litmus) | 40 | 12% (low) | [Email on Acid vs Litmus](https://www.vioscale.ai/compare/email-on-acid-vs-litmus) |
| 8 | [Mailpit](https://www.vioscale.ai/software/mailpit) | 40 | 23% (low) | [Email on Acid vs Mailpit](https://www.vioscale.ai/compare/email-on-acid-vs-mailpit) |

Email on Acid itself ranks #4 of 9 in Email Testing Dev.

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*Source: Vioscale (https://www.vioscale.ai/alternatives/email-on-acid). Generated 2026-09-01T14:44:29.889Z.*