Best FakeSMTP Alternatives & Competitors in 2025

MailHog is an email testing tool inspired by MailCatcher, but easier to install.

Key MailHog features:

Easy Setup Web Interface SMTP Server Simulation Integration with Development Environments

Open Source

Email Delivery Platform that delivers just in time.
 Great for businesses and individuals. .

Key Mailtrap features:

Automated Testing HTML/CSS Check Spam Analysis Deliverability Alerts

Open Source freemium

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder. .

Key MailReach.co features:

Deliverability Improving Email Warming Meaningful Warming Content Smart Warming Algorithm

Visit website paid $19.5 / Monthly (Pro)

Email Testing for QA & Development Teams.

Key Mailosaur features:

Ease of Use API Integration Realistic Testing Comprehensive Documentation

Smtp4dev is an all-in-one SMTP server designed to develop and test emails in your applications.

Key Smtp4dev features:

Open Source Local Testing Cross-Platform Web Interface

Email and SMS testing and development platform for software engineers and QA testers.

Key mailslurp features:

Temporary Email Generation API Integration Email Receiving and Sending Customizable Domains

Open Source freemium

MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a...

Key MailCatcher features:

Easy Setup Web Interface Simplicity Integration Capabilities

Open Source

Fake SMTP server for safe email testing. Stop accidentally spamming your customers.

Key MailSpons features:

User-Friendly Interface Targeted Audience Reach Comprehensive Analytics Scalability

Papercut is an operational print management platform designed for windows, macs, and Linux, helping you keep track of all your prints.

Key Papercut features:

Cost Efficiency Environmental Benefits User Management Security Features

Open Source

Dummy SMTP server with JavaFX gui for testing email sending applications - anlar/lunaticsmtp.

Key LunaticSMTP features:

Lightweight Customizable Easy to Setup Support for Lunatic Environment

Ethereal is a fake SMTP service, mostly aimed at Nodemailer users (but not limited to). It's a completely free anti-transactional email service where messages never get delivered.

Key Ethereal Email features:

Debugging Tool Free Service SMTP Support No Email Sending

Imitate Email is a fake SMTP server with an embeddable web widget to let developers and users test email flows without leaving their app.

QA tool for automating end-to-end email tests. Get unlimited private email addresses and inboxes for testing new user signups, transactional emails and drip campaigns, deliverability and spam scores, etc.

Key testmail.app features:

Email Testing Automation Real-time Results Integration Capabilities Multiple Inboxes

freemium

Sendria (formerly MailTrap) is a SMTP server designed to run in your dev/test environment, that is designed to catch any email you or your application is sending, and display it in a web interface instead of sending to real world.