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Average Ratings 0 Ratings

Total
ease
features
design
support

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Write a Review

Description

HELO is a desktop application that streamlines the email testing and debugging process for web developers by capturing and analyzing outgoing emails produced by applications in the development phase. Rather than dispatching emails to actual recipients, HELO offers a local SMTP server that intercepts these messages and presents them within the application, enabling developers to review and validate them prior to launching. This method is instrumental in avoiding frequent issues such as broken links, missing images, formatting mistakes, and other errors that can surface in live emails. It delivers comprehensive debug views that showcase the email in various formats, including HTML rendering, plain text, raw source code, and complete message headers, thus providing developers with an in-depth understanding of the email's structure. Additionally, automated validation tools are employed to check links within the email, ensuring they yield valid HTTP responses, which significantly mitigates the chances of sending emails that contain invalid or broken URLs. By integrating these features, HELO not only enhances the development workflow but also promotes confidence in the quality of email communications before they reach end users.

Description

Zyntra simplifies email testing for both automated and manual QA processes. For automated testing, it offers temporary mailboxes that provide unique email addresses for each test run, ensuring isolated and predictable test environments. With seamless integration into your existing testing workflows, Zyntra eliminates issues like flaky inboxes and unreliable email services. For manual testing, Zyntra provides persistent mailboxes with long retention periods, enabling easy tracking of multi-step processes and collaboration across teams. It also integrates with various testing tools via API or UI for fast and reliable test email retrieval.

API Access

Has API

API Access

Has API

Screenshots View All

Screenshots View All

No images available

Integrations

HTML

Integrations

HTML

Pricing Details

$49 per month
Free Trial
Free Version

Pricing Details

$9/10000 emails/month
Free Trial
Free Version

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

Vendor Details

Company Name

Beyond Code

Founded

2017

Country

Germany

Website

usehelo.com

Vendor Details

Company Name

Zyntra

Founded

2025

Website

zyntra.app/

Product 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

Product 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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Alternatives

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