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Average Ratings 0 Ratings

Total
ease
features
design
support

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Write a Review

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

Sendwithus empowers smaller teams to handle their transactional email needs without the complexities of source code integration. Enhance collaboration among team members through a structured folder system that facilitates simultaneous work on various campaigns. Gain greater control over your workflows with customizable user access settings, ranging from read-only permissions to full administrative rights. The in-app dashboard simplifies the management of both templates and users, streamlining the overall process. Users can easily share templates and reusable code snippets—covering elements such as headers, footers, and navigation—to maintain brand consistency across all communications. Each email can be previewed on numerous devices within the application to ensure it appears flawless before reaching your audience. Additionally, leverage localization and translation features to effectively engage with global markets, broadening your outreach and impact. With these tools, teams can work more efficiently and creatively, fostering innovation in their email campaigns.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

No images available

Screenshots View All

Integrations

Amazon Redshift No 
Amazon SES Yes 
Designmodo Postcards No 
Desktop.com No 
Dyspatch No 
Lyftrondata No 
Peaka No 
Postmark Yes 
Rambox No 
SendGrid Yes 
Shift No 
StarfishETL No 

Integrations

Amazon Redshift Yes 
Amazon SES No 
Designmodo Postcards Yes 
Desktop.com Yes 
Dyspatch Yes 
Lyftrondata Yes 
Peaka Yes 
Postmark No 
Rambox Yes 
SendGrid No 
Shift Yes 
StarfishETL 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 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) No 
Online Support No 

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

Dyspatch

Founded

2013

Country

United States

Website

www.dyspatch.io/sendwithus/

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 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 

Transactional Email

A/B Testing No 
Contact Database No 
Dynamic Content No 
Email Monitoring No 
Mailing List Management No 
Reporting/Analytics No 
Spam Check No 
Template Management No 

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