ColdletterOptosoftware inc.
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Related Products
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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.
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About
Completely free for 500 contacts or less with no restriction on features or support. Drag & Drop email designer with 70+ design blocks to choose from. Every account loaded with inbox ready email templates, one thousand email credits & 10 SMS credits. Unlike Klaviyo, Mailchimp & Sendgrid our send servers are hosted in the EU so your data never leaves Europe. You can even add Do not track to your sign up forms. Earn lifetime revenue when you recommend Sensorpro. And all the tools you need to manage an agency account. Whether a small business or sending 1M emails a day, our independent infrastructure has scale and capacity without reliance on third-parties like Amazon or Sendgrid.
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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
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Platforms Supported
Windows
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
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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
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Audience
Companies that need an email marketing and survey solution
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
Not Supported
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Screenshots and VideosNo images available
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Screenshots and Videos |
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Pricing
$0
Free Version
Supported
Free Trial
Not Supported
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Pricing
No information available.
Free Version
Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Not Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationOptosoftware inc.
Founded: 2025
Canada
coldletter.com
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Company InformationSensorpro
Founded: 2001
Ireland
sensorpro.eu
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Categories |
Categories |
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Survey Features
Custom Survey URLs
Not Supported
Data Analysis Tools
Supported
Email Marketing
Supported
Mobile Survey
Supported
Offline Response Collection
Not Supported
Paper Survey
Not Supported
Question Branching
Supported
Question Library
Not Supported
Site Intercept Survey
Not Supported
Skip Logic
Supported
Supports Audio / Images / Video
Supported
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Integrations
Amazon SES
Supported
BigCommerce
Not Supported
KonnectzIT
Not Supported
Postmark
Supported
SendGrid
Supported
Shopify
Not Supported
Ultra Commerce
Not Supported
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Integrations
Amazon SES
Not Supported
BigCommerce
Supported
KonnectzIT
Supported
Postmark
Not Supported
SendGrid
Not Supported
Shopify
Supported
Ultra Commerce
Supported
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