Coldletter

Coldletter

Optosoftware inc.
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About

Coldletter is an email templating and automation platform built for product and engineering teams that need better control over the emails their applications send. The platform works on top of providers such as SendGrid, Postmark, Amazon SES, Mailgun, Resend, and SparkPost, allowing teams to keep their existing delivery stack. Users can design responsive, accessible, and dark-mode-safe email templates with a visual editor instead of hand-coding complex HTML or MJML. Coldletter also supports reusable blocks, typed variables, live previews, test sends, localization, version control, and approval workflows. Its automation tools let teams build email journeys with triggers, waits, branches, A/B testing, and delivery analytics. Coldletter helps teams design, automate, manage, and deliver product emails more reliably from one centralized workspace.

About

Dyspatch is an industry leading email production platform designed to help businesses focus more time on innovation and less time on implementation. Empower your non-technical email team to increase engagement and conversion metrics by providing amazing email experiences at scale. Build beautiful, interactive email templates in minutes using pre-coded content blocks, and easily collaborate with key stakeholders all within Dyspatch. Easily integrate with your existing email service providers for sending.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Coldletter is designed for product teams, engineering teams, lifecycle marketers, SaaS companies, and developers that need a centralized platform for designing, automating, versioning, and sending product emails through existing providers

Audience

Email Management solution for individuals

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

$0
Free Version Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Supported
Live Online Supported
In Person Not Supported

Company Information

Optosoftware inc.
Founded: 2025
Canada
coldletter.com

Company Information

Dyspatch
Founded: 2013
Canada
www.dyspatch.io

Alternatives

Alternatives

AledaMail

AledaMail

Senders
SendGrid

SendGrid

Twilio SendGrid
Sendwithus

Sendwithus

Dyspatch
sendbunny

sendbunny

Sendbunny

Categories

Categories

Email Template Design Features

A/B Testing Not Supported
Code From Scratch Supported
Drag & Drop Editing Supported
Image Library Supported
Import HTML Code Supported
Mobile-Friendly / Responsive Supported
Potential Issue Identification Supported
Premade Templates Supported
Proofing Supported
Reporting / Analytics Not Supported
Text Editor Not Supported
Theme Editor Supported

Integrations

Postmark Supported
SendGrid Supported
Adobe Marketo Engage Not Supported
Amazon SES Supported
Crowdin Not Supported
Customer.io Not Supported
Eloqua Not Supported
HubSpot CRM Not Supported
Iterable Not Supported
Klaviyo Not Supported
Mailgun Not Supported
Mailjet Not Supported
Oracle Marketing Not Supported
Sailthru Not Supported
Salesforce Not Supported
Salesforce Marketing Cloud Account Engagement Not Supported
Sendwithus Not Supported
Smartling Not Supported
XTM Cloud Not Supported
dotdigital Engagement Cloud Not Supported

Integrations

Postmark Supported
SendGrid Supported
Adobe Marketo Engage Supported
Amazon SES Not Supported
Crowdin Supported
Customer.io Supported
Eloqua Supported
HubSpot CRM Supported
Iterable Supported
Klaviyo Supported
Mailgun Supported
Mailjet Supported
Oracle Marketing Supported
Sailthru Supported
Salesforce Supported
Salesforce Marketing Cloud Account Engagement Supported
Sendwithus Supported
Smartling Supported
XTM Cloud Supported
dotdigital Engagement Cloud Supported
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