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

Learn how to use PostSheet + Google Sheets to send personalized emails. This allows you to effectively mail merge using Google Sheets. If your Google spreadsheet doesn't have one already, create a new row at the top and fill it with the names of your columns. It doesn't matter if the header row has a different style or not. PostSheet does not send the emails itself. It creates the personalized messages and then hands them over to an email service provider to send. Many popular email service providers are supported including Gmail, Outlook, Mailgun, Mandrill, and Amazon SES. You can also use your own SMTP server.

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

Businesses searching for a no-code email and SMS solution that helps personalize emails and text messages

Support

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

Support

Phone Support Not Supported
24/7 Live Support Not 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

$9 per month
Free Version Not Supported
Free Trial Not 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 Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Optosoftware inc.
Founded: 2025
Canada
coldletter.com

Company Information

PostSheet
postsheet.com

Alternatives

Alternatives

AledaMail

AledaMail

Senders
sendbunny

sendbunny

Sendbunny
SendGrid

SendGrid

Twilio SendGrid

Categories

Categories

Personalization Supported

Integrations

Postmark Supported
SendGrid Supported
Airtable Not Supported
Amazon SES Supported
Amazon Web Services (AWS) Not Supported
Gmail Not Supported
Google Sheets Not Supported
Mailchimp Transactional Email (Mandrill) Not Supported
Mailgun Not Supported
Mailjet Not Supported
Microsoft Outlook Not Supported
Twilio Not Supported

Integrations

Postmark Supported
SendGrid Supported
Airtable Supported
Amazon SES Not Supported
Amazon Web Services (AWS) Supported
Gmail Supported
Google Sheets Supported
Mailchimp Transactional Email (Mandrill) Supported
Mailgun Supported
Mailjet Supported
Microsoft Outlook Supported
Twilio Supported
Claim Coldletter and update features and information
Claim Coldletter and update features and information
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