testmail.app Alternatives (January 2026)

testmail.app

Automate email tests | loved by developers & QA teams

https://testmai.app/

Test new user signups, transactional emails, spam scores, and more. Get started on our free forever plan with unlimited email addresses and mailboxes.

4/5

2+ reviews

Reviewed on:

G2
Capterra
1.
Test any email, SMS or user action with one API | Mailosaur
https://www.mailosau
.com/

Mailosaur removes the frustration of testing everything a user might do. 
Test password resets, replies, two-factor logins, and more.

2.
Home - Mailinator
https://www.mailinato
.com/

Mailinator provides Email and SMS Workflow Testing for Developers, Dev Teams, and QA Testing. Automate testing for 2FA and password resets.

3.
SMTPServer: Send Unlimited Emails | Email Delivery Service
https://smtpserve
.com/

Send bulk, transactional, & marketing emails with our easy-to-use and reliable SMTP. Check the quality of email and improve delivery. Get started for free!

4.
Mailtrap: Email Delivery Platform
https://mailtra
.io/

Email Delivery Platform to test, send and control email infrastructure in one place. Great for dev teams. Start today - Sign Up free!

5.
mailboxlayer API | Free, Powerful Email Validation API
https://mailboxlaye
.com/

Simple and powerful email verification JSON API using SMTP, typo checks, syntax validation, and free and disposable provider filtering. Free for personal use.

6.
Stedi - The only API-first clearinghouse
https://sted
.com/

Automate transactions like real-time eligibility checks and claims processing with developer-friendly, JSON-based APIs that support thousands of payers.

7.
Unlimited Email Warmup & Deliverability Testing Tool
https://mailoptima
.com/

Take your email deliverability to the next level with AI-powered email warmup for unlimited mailboxes and comprehensive deliverability tests

8.
Mail Tester: Free Email Spam Checker - Email Deliverability Tester
https://www.mailgeniu
.com/

Use our Mail Tester to test email. Get 3 Free Spam Tests to check your Email Deliverability and spam score with our free email spam checker.

9.
Parcel: The Email Coding Platform
https://parce
.io/

Parcel streamlines your development workflow to help you rapidly code high-quality emails. Get started for free!