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What is HELO?

HELO is a desktop application designed to simplify the process of email testing and debugging for web developers by capturing and analyzing emails generated during the application development stage. Instead of sending emails to real recipients, HELO includes a local SMTP server that intercepts outgoing messages and displays them within the application, allowing developers to inspect and verify the content prior to launch. This approach is essential for preventing common problems, such as broken links, missing images, and formatting errors, which may arise in live emails. The application provides detailed debugging views that illustrate the email in various formats—such as HTML display, plain text, raw source code, and full message headers—giving developers a thorough understanding of the email's architecture. Additionally, HELO implements automated validation tools to verify the links within the email, ensuring they return valid HTTP responses and significantly reducing the risk of distributing emails with invalid or broken URLs. By incorporating these capabilities, HELO not only streamlines the development process but also fosters greater confidence in the integrity of email communications before they are delivered to end users. Ultimately, this results in a more efficient workflow and enhances overall email quality, which is crucial in maintaining user engagement and satisfaction.

What is Debug Mail?

Debug Mail is an online SMTP server designed for testing and troubleshooting outgoing emails. Each subscription plan offers unlimited test emails every day. Users must supply credentials, snippets, and a REST API to facilitate smooth service interaction. Additionally, it allows for team creation and shared access for specific projects. You can easily report bugs by sending an email to the bug tracker through a direct link. Furthermore, it provides quick message searching and the ability to organize emails by title or date. Users can also examine the headers, along with HTML, text, and plain versions of their emails for comprehensive insights. This functionality ensures that all aspects of email testing and debugging are efficiently covered.

Media

Media

Integrations Supported

HTML

Integrations Supported

HTML

API Availability

Has API

API Availability

Has API

Pricing Information

$49 per month
Free Trial Offered?
Free Version

Pricing Information

$2 per user per month
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Beyond Code

Date Founded

2017

Company Location

Germany

Company Website

usehelo.com

Company Facts

Organization Name

DebugMail.io

Date Founded

2021

Company Location

United States

Company Website

debugmail.io

Categories and Features

Email Testing

A/B Testing
Accessibility Testing
DMARC Analytics
Deliverability Rates
HTML Validation
IP Blacklist Checking
Improvement Recommendations
Pre-Send Email Testing
Preview Across Browsers & Devices
Reporting / Analytics
Sender Reputation Scoring
Spam Testing

Categories and Features

Email Testing

A/B Testing
Accessibility Testing
DMARC Analytics
Deliverability Rates
HTML Validation
IP Blacklist Checking
Improvement Recommendations
Pre-Send Email Testing
Preview Across Browsers & Devices
Reporting / Analytics
Sender Reputation Scoring
Spam Testing

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