Best Mailosaur Alternatives in 2026
Updated
20 apps from email testing software ranked against Mailosaur on the same published basis.
- 1Mailosaur vs Mailpit
- 2Mailosaur vs Twilio Segment
- 3Mailosaur vs MailHog
- 4Mailosaur vs Emailens
- 5Mailosaur vs GlockApps
- 6Mailosaur vs Mailinator
- 7Mailosaur vs MailSlurp
- 8Mailosaur vs MailTester
- 9Mailosaur vs Mailtrap Email Sandbox
- 10Mailosaur vs SMTP Labs
- 11Mailosaur vs Unspam.email
- 12Mailosaur vs Ethereal Email
- 13Mailosaur vs MailDev
- 14Mailosaur vs Mailgun
- 15Mailosaur vs MailCatcher
- 16Mailosaur vs Twilio Email Testing
- 17Mailosaur vs EmailQA
- 18Mailosaur vs smtp4dev
- 19Mailosaur vs Postdrop
- 20Mailosaur vs RenderOps
Mailosaur alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Mailpit | 6.7 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 2 | Twilio Segment | 6.6 | Free plan | $120/mo | Web, iOS, Android |
| 3 | MailHog | 6.5 | Free plan | Free | API, Linux, Mac, self-hosted, Web |
| 4 | Emailens | 6.4 | Free plan | $9/mo | API, Browser, Web |
| 5 | GlockApps | 6.4 | Free plan | $59/mo | API, Web |
| 6 | Mailinator | 6.4 | Free plan | $79/mo | API, Web |
| 7 | MailSlurp | 6.4 | Free plan | $19.99/mo | API, Web |
| 8 | MailTester | 6.4 | Free plan | Free | API, self-hosted, Web |
| 9 | Mailtrap Email Sandbox | 6.4 | Free plan | $17/mo | API, Web |
| 10 | SMTP Labs | 6.4 | Free plan | $7/mo | API, Web |
| 11 | Unspam.email | 6.4 | Free plan | $5/mo | API, Web |
| 12 | Ethereal Email | 6.3 | Free plan | Free | API, Web |
| 13 | MailDev | 6.3 | Free plan | Free | API, self-hosted, Web |
| 14 | Mailgun | 6.3 | Free plan | Free | Web |
| 15 | MailCatcher | 5.5 | No | — | API, Linux, Mac, self-hosted, Web |
| 16 | Twilio Email Testing | 5.4 | No | $15/mo | Web |
| 17 | EmailQA | 5.3 | No | — | Web |
| 18 | smtp4dev | 5.3 | No | — | Web, Windows, Mac, Linux |
| 19 | Postdrop | 5.2 | No | — | Web |
| 20 | RenderOps | 5.2 | No | — | Web |
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Questions about Mailosaur alternatives
What is the best alternative to Mailosaur?
Mailpit, number 1 in email testing software with a score of 6.7 out of 10. The others here: Twilio Segment, MailHog, Emailens and 16 more.
What is the best free alternative to Mailosaur?
Mailpit is the best-ranked alternative with a free plan. 14 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.