Best MailTester Alternatives in 2026
Updated
20 tools from email testing software ranked against MailTester on the same published basis.
- 1MailTester vs Twilio Segment
- 2MailTester vs Mailpit
- 3MailTester vs GlockApps
- 4MailTester vs MailSlurp
- 5MailTester vs MailHog
- 6MailTester vs Mailtrap Email Sandbox
- 7MailTester vs SMTP Labs
- 8MailTester vs Emailens
- 9MailTester vs Litmus
- 10MailTester vs Unspam.email
- 11MailTester vs Mailosaur
- 12MailTester vs MailCatcher
- 13MailTester vs Mailgun
- 14MailTester vs Twilio Email Testing
- 15MailTester vs Inbox Monster
- 16MailTester vs SendForensics
- 17MailTester vs EmailQA
- 18MailTester vs smtp4dev
- 19MailTester vs Mailinator
- 20MailTester vs RenderOps
MailTester alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Twilio Segment | 7.8 | Free plan | $120/mo | Web, iOS, Android |
| 2 | Mailpit | 7.5 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 3 | GlockApps | 7.3 | Free plan | $59/mo | API, Web |
| 4 | MailSlurp | 7.1 | Free plan | $19.99/mo | API, Web |
| 5 | MailHog | 7.0 | Free plan | Free | API, Linux, Mac, self-hosted, Web |
| 6 | Mailtrap Email Sandbox | 7.0 | Free plan | $17/mo | API, Web |
| 7 | SMTP Labs | 7.0 | Free plan | $7/mo | API, Web |
| 8 | Emailens | 6.9 | Free plan | $9/mo | API, Browser, Web |
| 9 | Litmus | 6.9 | No | $99/mo | API, Browser, Web |
| 10 | Unspam.email | 6.9 | Free plan | $5/mo | API, Web |
| 11 | Mailosaur | 6.8 | No | $20/mo | API, Web |
| 12 | MailCatcher | 6.6 | No | — | API, Linux, Mac, self-hosted, Web |
| 13 | Mailgun | 6.6 | Free plan | Free | Web |
| 14 | Twilio Email Testing | 6.6 | No | $15/mo | Web |
| 15 | Inbox Monster | 6.5 | No | $312.50/mo | Web |
| 16 | SendForensics | 6.5 | No | $49/mo | Web |
| 17 | EmailQA | 6.1 | No | — | Web |
| 18 | smtp4dev | 6.1 | No | — | Web, Windows, Mac, Linux |
| 19 | Mailinator | 5.9 | Free plan | $79/mo | API, Web |
| 20 | RenderOps | 5.9 | No | — | Web |
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Questions about MailTester alternatives
What is the best alternative to MailTester?
Twilio Segment, number 1 in email testing software with a score of 7.8 out of 10. The others here: Mailpit, GlockApps, MailSlurp and 16 more.
What is the best free alternative to MailTester?
Twilio Segment is the best-ranked alternative with a free plan. 11 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.