Mailosaur Alternatives (January 2026)

Mailosaur

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.

4.8/5

39+ reviews

Reviewed on:

G2
Capterra
Producthunt
1.
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.

2.
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.

3.
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!

4.
SendPost Transactional Email API & SMTP Relay
https://app.sendpos
.io/

Email API and SMTP relay to not just send and measure email sending, but also alert and optimise. We provide you with tools, expertise and support needed to reliably deliver emails to your customers inboxes on time, every time.

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.
Transactional Email API Service For Developers | Mailgun
https://www.mailgu
.com/

Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!

7.
SocketLabs | Email Delivery and Reporting Solutions
https://www.socketlab
.com/

Everything you need for more successful email delivery and performance management, from simple sending tools to deeply informative reporting.

8.
Disposable email accounts and instant random email address
https://www.mailslur
.com/

Random email address and phone number generators. Use SMS and email in otp tests, 2fa verification, and marketing.

9.
Email Sending Service - MailerSend
https://www.mailersen
.com/

Start sending emails with our top-rated service. Sign up for free now to streamline your email sending process with API or SMTP.