Coldletter

Coldletter

Optosoftware inc.
Ultra Email

Ultra Email

Code Craft
Coldletter Ultra Email

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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.
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.
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
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
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
Ultra Email:

Audience

Small businesses, marketers and agencies that send newsletters and offers to opted-in contacts from their own mailboxes.
Coldletter:

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported
Ultra Email:

Support

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

API

Offers API Not Supported
Ultra Email:

API

Offers API Not Supported
Coldletter:

Screenshots and Videos

No images available
Ultra Email:

Screenshots and Videos

Coldletter:

Pricing

$0
Free Version Supported
Free Trial Not Supported
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
Coldletter:

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
Ultra Email:

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
Coldletter:

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported
Ultra Email:

Training

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

Company Information

Optosoftware inc.
Founded: 2025
Canada
coldletter.com
Ultra Email:

Company Information

Code Craft
Founded: 2015
India
ultraemailer.org/email
Coldletter:

Alternatives

Ultra Email:

Alternatives

No Alternatives
Coldletter:
AledaMail

AledaMail

Senders
Coldletter:
sendbunny

sendbunny

Sendbunny
4.0 out of 5 stars
Coldletter:
SendGrid

SendGrid

Twilio SendGrid
3.9 out of 5 stars
Coldletter:
Ultra Email:
Coldletter:

Categories

Ultra Email:

Categories

Bulk Email Supported
Email Marketing Supported
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
Ultra Email:

Integrations

Amazon SES Supported
Postmark Supported
SendGrid Supported
Brevo Supported
Gmail Supported
Mailgun Supported
Microsoft Outlook Supported
Zoho Mail Supported
Coldletter:
Claim Coldletter and update features and information
Claim Coldletter and update features and information
Ultra Email:
Claim Ultra Email and update features and information
Claim Ultra Email and update features and information