Mailosaur 2026: Benefits, Features & Pricing

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Overview
Pricing and Plans
Features
Integrations
User Reviews

Overview

Mailosaur

4.8

(20)

Pricing

Pricing available upon request

About Mailosaur

Mailosaur is an API-based testing platform designed for developers and quality assurance teams to test email, SMS, and user actions within applications. It is used across industries such as finance, healthcare, retail, and travel by engineering teams, quality assurance professionals, product managers, and marketing departments.

The platform provides virtual SMTP servers, enabling businesses to capture outgoing emails from applications. Features include email and SMS testing, email previews across various clients, automated rules for simulating scenarios, message analysis tools, and multi-factor authentication testing. It allows teams to use custom domains with unlimited recognizable email addresses and ensure enterprise-level security through single sign-on.

Mailosaur supports multiple programming languages, including JavaScript, Python, C#, Java, and Ruby. It is compatible with testing frameworks such as Cypress, Playwright, and Selenium. The platform adheres to security standards, holding ISO 27001 certification and complying with regulations such as GDPR, DORA, and CCPA to ensure data protection during testing.

Mailosaur Screenshots

Mailosaur Pricing and Plans

Starting price: Pricing available upon request

Free Trial

Free Version

Starter

Pricing available upon request

Plan includes:

50 daily email tests
Unlimited email addresses
API for test automation
SMTP connectivity
Forward to external email addresses
ISO-27001:2022 certified

Business

Pricing available upon request

Plan includes:

Includes 5,000 daily email tests
500 SMS messages/month
Up to 5 users included
SMS testing functionality
Test multi-factor authentication with SMS or Mailosaur Authenticator
Automated forwarding/filtering
Reply to messages to simulate customer replies
Unlimited email addresses
Negative testing
Fetch email via IMAP or POP3

Professional

Pricing available upon request

Plan includes:

Includes 50,000 daily email tests
2,500 SMS messages/month
Up to 10 users
Access premium phone numbers
Priority support
Use your own domain name for email addresses
Ability to add single sign-on (SSO)
Support for higher test volumes
Unlimited email addresses
Screenshot your emails

Enterprise

Pricing available upon request

Plan includes:

Enterprise security (inc. SSO & SCIM)
SLA for 99.9% Uptime
Advanced support
Dedicated account manager
Guided 'hands-on' onboarding
Support for custom terms
Access to phone numbers in any supported country

Mailosaur Features

Popular features found in Automated Testing
API
Collaboration Tools
Customizable Reports
Hierarchical View
Model-Based Testing
Monitoring
Reporting & Statistics
Requirements Management
Software Testing Management
Supports Parallel Execution
Test Script Reviews
Workflow Management
More features of Mailosaur
Alerts/Notifications
Bug Tracking
Quality Assurance
Real-Time Monitoring
Real-Time Reporting
Security Testing

Mailosaur Integrations

Postman

Ghost Inspector

Mailosaur User Reviews

Overall Rating

4.8

Ratings Breakdown

80%

20%

Secondary Ratings

Ease of Use

4.8

Value for money

4.4

Customer support

4.7

Functionality

4.7

Have you used Mailosaur and would like to share your experience with others?

Nathan G.

Verified reviewer

Computer Software

11-50 employees

Used daily for less than 12 months

Review source

Reviewed May 2023

Easy to use and very flexible

Great solution for our automated test suite to both handle real SMS and email testing programatically.

Ratings Breakdown

Ease of use

Value for money

Functionality

Pros:

Provided a lot of options on how to use it at a very cost effective price point.

Cons:

Some of the docs where not super clear on how to interact with it via the API.

Reasons for switching to Mailosaur

No programatic way to interact with Google was the primary reason.

Wojcieh H.

Verified reviewer

Construction

11-50 employees

Used daily for less than 12 months

Review source

Reviewed May 2024

Ease of use and great customer support.

Ratings Breakdown

Ease of use

Value for money

Customer support

Functionality

Pros:

Ease of use and great communication with customer support.

Cons:

Testing SendGrid emails was quite unstable but they managed to fix this after some time.

Reasons for switching to Mailosaur

I wanted a solution that will be easier to maintain.

Verified

Reviewer

Computer & Network Security

51-200 employees

Used weekly for less than 6 months

Review source

Reviewed October 2023

Great product for automation testing

I’m a very happy customer. 10/10 would recommend.

Ratings Breakdown

Ease of use

Value for money

Customer support

Functionality

Pros:

Ease of use for setting up extra emails and SMS

Cons:

Hmmm tough question. The UI is great and I feel there is little to improve upon.

Olena P.

Verified reviewer

Information Technology and Services

11-50 employees

Used daily for more than 2 years

Review source

Reviewed November 2025

4. A strong choice for email QA automation with a few cost and usability drawbacks.

Ratings Breakdown

Ease of use

Value for money

Customer support

Functionality

Pros:

Mailosaur is a very handy tool for anyone doing automated email testing. The API is clean and easy to work with, and the documentation provides solid examples, so getting started is quick. It reliably captures OTP codes, password reset links, and other transactional emails, and it’s great for validating HTML, text content, and attachments. Emails usually arrive within seconds, and the shared inbox setup works smoothly for teams using CI/CD or multiple environments.

Cons:

The pricing is definitely on the higher side compared to alternatives, and the limited free trial means you end up upgrading pretty quickly. For small companies, the SMS testing feature in particular can get expensive, which makes full end-to-end verification harder to justify. The dashboard could also use some improvements—searching and filtering messages isn’t as intuitive as it could be, especially in larger test suites. Very occasionally emails arrive with slight delays, and the lack of a self-hosted option may be a drawback for teams with stricter security needs.

Ryan S.

Verified reviewer

Computer Software

51-200 employees

Used daily for more than 2 years

Review source

Reviewed May 2023

Mailosaur for test automation

Good, I think the service we pay for and use with email is great and very reliable, we have not experienced any failures due to Mailosaur. I would like some cheaper ways to use their SMS services.

Ratings Breakdown

Ease of use

Value for money

Customer support

Functionality

Pros:

We picked up Mailosaur as an off-the-shelf way to test our email flow. A lot of our automation that deals with email relies on it. The setup for validating links inside of the emails was very easy to work with in the Mailosar API, something I was looking for in a tool like this.

Cons:

We would love to use SMS features, but the pricing is more than we are willing to commit to currently. Also not a fan of per-user pricing on a tool like this where the volume is also priced. We have limited seats.

Reasons for choosing Mailosaur

We considered setting up our own bespoke SMTP client or using Gmail, but both routes would've taken significant time compared to using this tool. This really is a dead simple tool for doing email test validation.

Verified

Reviewer

Retail

1001-5000 employees

Used daily for more than 2 years

Review source

Reviewed January 2024

Best Product with features and secure

Good product to use for automate your emails

Ratings Breakdown

Ease of use

Value for money

Customer support

Functionality

Pros:

It's easy setup and you can customize the functionality for 20 scrum teams

Cons:

Phone Numbers support for SMS within The Netherlands , you cannot get a mobile number.

Reasons for choosing Mailosaur

better functionality and secure, the enterprise plan is very comprehensive

Alexander L.

Verified reviewer

Information Services

51-200 employees

Used monthly for less than 6 months

Review source

Reviewed February 2025

Easy to use and works well

It works well for our needs. We need to enter real email addresses in our tests to not be blocked from sending because of too high of a bounce rate. We also need to test that the email, Authenticator and sms related features in our product work well.

Ratings Breakdown

Ease of use

Value for money

Customer support

Functionality

Pros:

It is easy to set up and works well. Provides APIs to easily use it in your end to end tests.

Cons:

Don't really know. Haven't tried any competing products. I guess it could be cheaper or more seats be available in each tier.

Devadasan K.

Verified reviewer

Information Technology and Services

10000+ employees

Used daily for more than 2 years

Review source

Reviewed April 2024

Simple and reliable product

Ratings Breakdown

Ease of use

Customer support

Functionality

Pros:

Pretty easy to setup and use. Support is readily available. When there was an issue is recovered, Mailosaur team was able to rollout the fix in 2 days. Thats amazing

Cons:

Nothing much that I can think about at this point.

Lee W.

Verified reviewer

Insurance

5001-10000 employees

Used daily for more than 2 years

Review source

Reviewed January 2024

Powerful tool for Automated testing of Emails and SMS

Very positive, if I were to change company and they didn't have a Mailosaur license I would push to get one.

Ratings Breakdown

Ease of use

Value for money

Customer support

Functionality

Pros:

1- Excellent customer support, they are very knowledgeable about their tool, every time I have ended conversations with Mailosaur support I have ended it with the solution to my problem. Customer support are very patient and respectable towards their customers. 2 - The API integration for the Mailosaur tool has a lot of great functionality and supports multiple languages Java, Python, C#, Ruby and Node.js. I have only used the Java API so that is all I can speak to, it's very reliable. 3 - It's nice to have a front end view into the Virtual mailboxes, it really helps debug defects.

Cons:

There is usage limits based on the license price. It's completely understandable and very fixable, if the company I work for wants more Mailosaur resources, pay more money. The price you pay for Mailosaur depends on how you configure the below limitations. I really don't have any complaints about Mailsoaur so wanted to use this field to provide useful information. The usage limits currently apply to: Number of emails sent per day. Number of SMS messages sent per month. Number of phone numbers assignable. Number of registered users.

Matt N.

Verified reviewer

Financial Services

1001-5000 employees

Used daily for more than 2 years

Review source

Reviewed May 2023

A brilliant service that we couldn't be without

The thing that impressed me most at first was the level of personalised support that we received from Andy. There was a minor issue with a function that was corrected almost overnight. Mailosaur has helped us scale our testing for our Dashboard product from it's formative stages to the critical application that it's become for our customers.

Ratings Breakdown

Ease of use

Customer support

Functionality

Pros:

It was very easy to configure with Cypress and it provides us with demo users for presentations and manual testing

Cons:

I really can't think of anything. Its never failed us. I've never received strange errors and the service is always up.

Reasons for choosing Mailosaur

Someone recommended it from their previous company

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