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Average Ratings 6 Ratings

Total
ease
features
design
support

Description

Coldletter is an email design and automation layer that helps teams create, manage, and send product emails without replacing their existing email provider. It connects with delivery services such as SendGrid, Postmark, Amazon SES, Mailgun, Resend, and SparkPost, giving companies flexibility while keeping sending infrastructure intact. The platform includes a visual editor where teams can build templates, add variables, reuse blocks, and preview emails across clients such as Gmail, Outlook, and Apple Mail. Every template is designed to be responsive, accessible, and safe for dark mode by default. Developers can trigger templates through a single API request while Coldletter handles rendering, data merging, routing, retries, suppression, and idempotency. Marketing, lifecycle, design, and product teams can use the platform to manage email content without constantly relying on engineering for every change. Journey automation tools allow users to create workflows based on events, schedules, engagement, attributes, or A/B testing paths. Version control, template diffs, rollbacks, localization, test sends, roles, approvals, and analytics help teams manage production emails with more confidence. Coldletter gives organizations a structured way to build polished product emails while improving collaboration between technical and non-technical teams.

Description

Critical Impact allows you to amplify and facilitate your email marketing strategies. Our platform allows you to efficiently monitor your email and messaging portfolio, send edited and scheduled emails and text messages (SMS) for your advertising efforts with an affordable pricing structure. Our subscriber assessment technique digs deep into your data to quickly find the subscribers who are most likely to read your next email, receive more emails, or make an additional purchase. With our user-friendly interface, you can schedule the forwarding of your communications in seconds. Choose your sending options on a single page, then avoid errors by viewing the configuration of all your submission details. Even rate your email on display, from phone, tablet to monitor.

API Access

Has API No 

API Access

Has API Yes 

Screenshots View All

No images available

Screenshots View All

Integrations

Amazon SES Yes 
Compete Club Management No 
Facebook No 
Google Analytics No 
Magento No 
Postmark Yes 
Salesforce No 
SendGrid Yes 
Shopify No 
Sugar Sell No 
Zapier No 

Integrations

Amazon SES No 
Compete Club Management Yes 
Facebook Yes 
Google Analytics Yes 
Magento Yes 
Postmark No 
Salesforce Yes 
SendGrid No 
Shopify Yes 
Sugar Sell Yes 
Zapier Yes 

Pricing Details

$0
Free Trial No 
Free Version Yes 

Pricing Details

Customer Specific. Call or email for pricing.
Free Trial No 
Free Version 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 

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

Types of Training

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

Types of Training

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

Vendor Details

Company Name

Optosoftware inc.

Founded

2025

Country

Canada

Website

coldletter.com

Vendor Details

Company Name

Critical Impact

Founded

2009

Country

United States

Website

criticalimpact.com

Product Features

Email Marketing

A/B Testing No 
Artificial Intelligence No 
Auto-Responders No 
CAN SPAM Compliance No 
Customer Surveys No 
Drip Campaigns No 
Dynamic Content No 
Event Triggered Email No 
Image Library No 
Landing Pages/Web Forms No 
Mailing List Management No 
Mobile Optimized Emails No 
Reporting/Analytics No 
Subscriber Management No 
Template Management No 
WYSIWYG Email Editor No 

Email Template Design

A/B Testing No 
Code From Scratch No 
Drag & Drop Editing No 
Image Library No 
Import HTML Code No 
Mobile-Friendly / Responsive No 
Potential Issue Identification No 
Premade Templates No 
Proofing No 
Reporting / Analytics No 
Text Editor No 
Theme Editor No 

Product Features

Email Marketing

A/B Testing Yes 
Artificial Intelligence No 
Auto-Responders Yes 
CAN SPAM Compliance Yes 
Customer Surveys Yes 
Drip Campaigns Yes 
Dynamic Content Yes 
Event Triggered Email Yes 
Image Library Yes 
Landing Pages/Web Forms Yes 
Mailing List Management Yes 
Mobile Optimized Emails Yes 
Reporting/Analytics Yes 
Subscriber Management Yes 
Template Management Yes 
WYSIWYG Email Editor Yes 

Email Template Design

A/B Testing Yes 
Code From Scratch Yes 
Drag & Drop Editing Yes 
Image Library Yes 
Import HTML Code Yes 
Mobile-Friendly / Responsive Yes 
Potential Issue Identification Yes 
Premade Templates Yes 
Proofing Yes 
Reporting / Analytics Yes 
Text Editor Yes 
Theme Editor Yes 

Email Tracking

A/B Testing Yes 
Audience Segmentation Yes 
Campaign Management Yes 
Event-Based Notifications Yes 
Location Tracking No 
Team Management Yes 

SMS Marketing

2-Way Messaging Yes 
Artificial Intelligence No 
Contact Management Yes 
MMS Yes 
Mass Texting Yes 
Message Personalization Yes 
Mobile Coupons Yes 
Mobile Keywords Yes 
Polls / Voting Yes 
Reporting/Analytics Yes 
Scheduled Messaging Yes 
Shortcodes Yes 
Text-to-Win Yes 

Transactional Email

A/B Testing Yes 
Contact Database Yes 
Dynamic Content Yes 
Email Monitoring Yes 
Mailing List Management Yes 
Reporting/Analytics Yes 
Spam Check Yes 
Template Management Yes 

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