ColdletterOptosoftware inc.
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Ultra EmailCode Craft
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Related Products
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Coldletter:
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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Ultra Email:
About
Ultra Email is an installed bulk email application for small businesses, marketers, agencies and newsletter publishers managing opted-in contacts. It keeps contact lists, templates and campaign history on the user's device, then sends campaigns through mailboxes or email services such as Gmail, Outlook, Microsoft 365, Zoho Mail, Amazon SES, SendGrid, Brevo, Mailgun and Postmark. Users can import contacts from spreadsheets or CSV files, compose HTML or text messages, personalize emails with merge tags, rotate sender accounts, set sending limits, schedule campaigns, and review delivery, open and click activity. Unsubscribe handling, opt-out lists and consent records are included. Ultra Email runs on Windows, macOS, Linux and Android; sending requires an internet connection and a configured mail provider. Its no-time-limit trial permits up to 50 emails per day. Paid licences are offered monthly, yearly or as a one-time purchase.
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Coldletter:
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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Ultra Email:
Platforms Supported
Windows
Supported
Mac
Supported
Linux
Supported
Cloud
Not Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Supported
Chromebook
Not Supported
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Coldletter:
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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Ultra Email:
Audience
Small businesses, marketers and agencies that send newsletters and offers to opted-in contacts from their own mailboxes.
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Coldletter:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Ultra Email:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Coldletter:
API
Offers API
Not Supported
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Ultra Email:
API
Offers API
Not Supported
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Coldletter:
Screenshots and VideosNo images available
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Ultra Email:
Screenshots and Videos |
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Coldletter:
Pricing
$0
Free Version
Supported
Free Trial
Not Supported
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Ultra Email:
Pricing
$29/month
Starter covers 1 device: $29 monthly, $79 yearly, or $199 lifetime. Business covers 3 devices: $59 monthly, $159 yearly, or $399 lifetime. Agency covers 10 devices: $119 monthly, $299 yearly, or $799 lifetime. Monthly and yearly licences are prepaid and do not auto-renew. The Mac edition costs 30% more. The no-time-limit free version allows 50 emails per day; a paid licence removes the daily cap. Licences include a 15-day money-back guarantee.
Free Version
Not Supported
Free Trial
Supported
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Coldletter:
Reviews/
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Ultra Email:
Reviews/
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Coldletter:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Ultra Email:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Coldletter:
Company InformationOptosoftware inc.
Founded: 2025
Canada
coldletter.com
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Ultra Email:
Company InformationCode Craft
Founded: 2015
India
ultraemailer.org/email
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Coldletter:
Alternatives |
Ultra Email:
AlternativesNo Alternatives
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Coldletter:
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Coldletter:
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Coldletter:
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Coldletter:
Categories |
Ultra Email:
Categories |
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Coldletter:
Integrations
Amazon SES
Supported
Postmark
Supported
SendGrid
Supported
Brevo
Not Supported
Gmail
Not Supported
Mailgun
Not Supported
Microsoft Outlook
Not Supported
Zoho Mail
Not Supported
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Ultra Email:
Integrations
Amazon SES
Supported
Postmark
Supported
SendGrid
Supported
Brevo
Supported
Gmail
Supported
Mailgun
Supported
Microsoft Outlook
Supported
Zoho Mail
Supported
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Coldletter:
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Ultra Email:
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