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Average Ratings 0 Ratings

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ease
features
design
support

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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

Mailtrap is an email API and SMTP service provider built for developer and product teams. It is designed to send transactional and bulk emails with a strong focus on high deliverability rates and reliable performance. Quick integration is enabled through official SDKs for major programming languages, ready-to-use code snippets, and extensive resources, including broad documentation, blog guides, and video tutorials. The platform is backed by 24/7 support from a team of engineers and deliverability experts. Mailtrap’s robust infrastructure is built to handle high-volume sending, allowing businesses to scale confidently. High inboxing rates are ensured with features like dedicated IPs, auto warm-up, separate sending streams, and multi-tenant accounts.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

Screenshots View All

Integrations

AccessOwl No 
Claude No 
Cursor No 
Devin Desktop No 
Elixir No 
HTML Yes 
Heroku No 
Java No 
Laravel No 
Lovable No 
PHP No 
Retool No 
Ruby No 
Stripo.email No 
Symfony No 
Tabular No 
Visual Studio Code No 
Zapier No 
n8n No 
v0 No 

Integrations

AccessOwl Yes 
Claude Yes 
Cursor Yes 
Devin Desktop Yes 
Elixir Yes 
HTML No 
Heroku Yes 
Java Yes 
Laravel Yes 
Lovable Yes 
PHP Yes 
Retool Yes 
Ruby Yes 
Stripo.email Yes 
Symfony Yes 
Tabular Yes 
Visual Studio Code Yes 
Zapier Yes 
n8n Yes 
v0 Yes 

Pricing Details

$49 per month
Free Trial No 
Free Version Yes 

Pricing Details

$15/month
Mailtrap offers transparent and flexible plans to cover the needs of your business, separated into Email API/SMTP (includes Email Marketing) and Email Sandbox.

Email API/SMTP - send transactional & promo emails
- Free: 3,5K emails/mo
- Basic: from $15/mo and from 10,000 emails
- Business: from $85/month and from 100,000 emails
- Enterprise: from $750/month and from 1.5 million emails
- Custom: Tailored for high-volume senders with dedicated support.

Email Sandbox - test your emails
- Free: 50 test emails/mo
- Basic: $17/mo (or $14/mo, billed annually)
- Team: $42/mo (or $34/mo, billed annually)
- Business: $123/mo (or $99/mo, billed annually)
- Enterprise: $498/mo (or $399/mo, billed annually)
Free Trial No 
Free Version Yes 

Deployment

Web-Based No 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac Yes 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) Yes 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) Yes 
In Person No 

Vendor Details

Company Name

Beyond Code

Founded

2017

Country

Germany

Website

usehelo.com

Vendor Details

Company Name

Railsware

Founded

2007

Country

United States

Website

mailtrap.io

Product Features

Email Testing

A/B Testing No 
Accessibility Testing No 
DMARC Analytics No 
Deliverability Rates No 
HTML Validation No 
IP Blacklist Checking No 
Improvement Recommendations No 
Pre-Send Email Testing No 
Preview Across Browsers & Devices No 
Reporting / Analytics No 
Sender Reputation Scoring No 
Spam Testing No 

Product Features

Email Deliverability

DMARC Analytics Yes 
Deliverability Alerts Yes 
Deliverability Reporting Yes 
Email Address Verification Yes 
Email Content Testing Yes 
Email Previewing Yes 
IP Blacklist Monitoring Yes 
Inbox Placement Testing Yes 
Reputation Reporting Yes 

Email Testing

A/B Testing No 
Accessibility Testing Yes 
DMARC Analytics Yes 
Deliverability Rates Yes 
HTML Validation Yes 
IP Blacklist Checking Yes 
Improvement Recommendations Yes 
Pre-Send Email Testing Yes 
Preview Across Browsers & Devices Yes 
Reporting / Analytics Yes 
Sender Reputation Scoring Yes 
Spam Testing Yes 

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