Average Ratings 0 Ratings
Average Ratings 0 Ratings
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
Email Creation Platform. Email creation can be dramatically reduced without the need for additional staff or compromises in quality. Stensul integrates seamlessly with the most popular automation platforms. You can optimize your team's resources without having to hire staff or compromise on quality. Guardrails allow marketers to create emails in minutes. Facilitate collaboration so teams can create high-performing emails that deliver results. Instead of communicating in disconnected messaging platforms, an end-to-end platform connects all team members.
API Access
Has API
No
API Access
Has API
No
Screenshots View All
No images available
Integrations
Acoustic Campaign
No
Adobe Campaign
No
Adobe Marketo Engage
No
Amazon SES
Yes
Braze
No
Eloqua
No
HubSpot CRM
No
HubSpot Customer Platform
No
HubSpot Marketing Hub
No
Iterable
No
Integrations
Acoustic Campaign
Yes
Adobe Campaign
Yes
Adobe Marketo Engage
Yes
Amazon SES
No
Braze
Yes
Eloqua
Yes
HubSpot CRM
Yes
HubSpot Customer Platform
Yes
HubSpot Marketing Hub
Yes
Iterable
Yes
Pricing Details
$0
Free Trial
No
Free Version
Yes
Pricing Details
No price information available.
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
No
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
Yes
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
No
Types of Training
Training Docs
No
Webinars
No
Live Training (Online)
No
In Person
No
Vendor Details
Company Name
Optosoftware inc.
Founded
2025
Country
Canada
Website
coldletter.com
Vendor Details
Company Name
stensul
Country
United States
Website
stensul.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
No
CAN SPAM Compliance
Yes
Customer Surveys
No
Drip Campaigns
No
Dynamic Content
Yes
Event Triggered Email
No
Image Library
Yes
Landing Pages/Web Forms
No
Mailing List Management
No
Mobile Optimized Emails
Yes
Reporting/Analytics
No
Subscriber Management
No
Template Management
Yes
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