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
MagicBell is a full-stack notification system for app, web, mobile and email. It saves you hundreds of hours of manual coding and can be deployed within a day. It supports a wide range of integrations such as:
- Slack & SMS
- iOS & Android
- Firebase
- SendGrid & Mailgun & Postmark
- Google Chrome, Safari, Firefox
MagicBell learns about your users’ preferences and protects them from unnecessary digital noise with smart notifications delivery, unlike other notification systems. You can be sure that every notification landing into your users’ inbox is contextually relevant, making the experience of using your product even more delightful.
We also offer straightforward documentation, extensible, feature-rich API and a playground for visual testing.
The product is entirely FREE for up to 100 active users.
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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
Supported
Linux
Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Supported
iPad
Supported
Android
Supported
Chromebook
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
B2B SaaS, Financial Technology Companies
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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
Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
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
Free
Free Version
Supported
Free Trial
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
Supported
Webinars
Not Supported
Live Online
Supported
In Person
Supported
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Company InformationOptosoftware inc.
Founded: 2025
Canada
coldletter.com
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Company InformationMagicBell
Founded: 2021
United States
www.magicbell.com
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Categories |
Categories |
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Push Notifications Features
A/B Testing
Not Supported
Analytics
Supported
Campaign Segmentation
Not Supported
Contextual Targeting
Supported
Device Targeting
Supported
Expiry Notifications
Supported
Geo Targeting
Not Supported
Mobile Notifications
Supported
Notification Scheduling
Supported
Visual Notifications
Supported
Web Notifications
Supported
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Integrations
Postmark
Supported
SendGrid
Supported
AccessOwl
Not Supported
Amazon SES
Supported
Android
Not Supported
Apple iOS
Not Supported
Chrome OS
Not Supported
Firebase
Not Supported
Mailgun
Not Supported
Mozilla Firefox
Not Supported
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Integrations
Postmark
Supported
SendGrid
Supported
AccessOwl
Supported
Amazon SES
Not Supported
Android
Supported
Apple iOS
Supported
Chrome OS
Supported
Firebase
Supported
Mailgun
Supported
Mozilla Firefox
Supported
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