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Average Ratings 0 Ratings

Total
ease
features
design
support

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Write a Review

Description

Coldletter is an email design and automation layer that helps teams create, manage, and send product emails without replacing their existing email provider. It connects with delivery services such as SendGrid, Postmark, Amazon SES, Mailgun, Resend, and SparkPost, giving companies flexibility while keeping sending infrastructure intact. The platform includes a visual editor where teams can build templates, add variables, reuse blocks, and preview emails across clients such as Gmail, Outlook, and Apple Mail. Every template is designed to be responsive, accessible, and safe for dark mode by default. Developers can trigger templates through a single API request while Coldletter handles rendering, data merging, routing, retries, suppression, and idempotency. Marketing, lifecycle, design, and product teams can use the platform to manage email content without constantly relying on engineering for every change. Journey automation tools allow users to create workflows based on events, schedules, engagement, attributes, or A/B testing paths. Version control, template diffs, rollbacks, localization, test sends, roles, approvals, and analytics help teams manage production emails with more confidence. Coldletter gives organizations a structured way to build polished product emails while improving collaboration between technical and non-technical teams.

Description

Sendbunny is your very own self-hosted email platform that serves as a contemporary alternative to services like Resend, SendGrid, Mailgun, and Mailchimp, catering specifically to developers and businesses seeking to lower their email expenses while maintaining unlimited contacts and complete control over their customer information. With just three clicks, you can deploy it directly to your AWS account without the hassle of using a terminal or YAML configuration, allowing you to pay a one-time licensing fee rather than a monthly fee that increases as your contact list grows; plus, you can send emails using your own AWS infrastructure. This platform enables you to handle both transactional and marketing emails seamlessly, all from a singular interface that allows for the management of unlimited contacts, audiences, campaigns, templates, sending domains, APIs, suppressions, and analytics. With Sendbunny, you are in charge of your infrastructure, your data, and your sending reputation, eliminating concerns about vendor lock-in or per-contact fees. It is particularly well-suited for developers, SaaS teams, startups, agencies, and businesses that want to cut down on email service provider expenses without sacrificing access to modern email functionalities. Choose Sendbunny for a comprehensive email solution that empowers your organization on AWS.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

No images available

Screenshots View All

No images available

Integrations

Amazon SES Yes 
Postmark Yes 
SendGrid Yes 

Integrations

Amazon SES No 
Postmark No 
SendGrid No 

Pricing Details

$0
Free Trial No 
Free Version Yes 

Pricing Details

$199 one-time license fee
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Optosoftware inc.

Founded

2025

Country

Canada

Website

coldletter.com

Vendor Details

Company Name

sendbunny

Founded

2026

Country

United States

Website

sendbunny.co

Product Features

Email Marketing

A/B Testing No 
Artificial Intelligence No 
Auto-Responders No 
CAN SPAM Compliance No 
Customer Surveys No 
Drip Campaigns No 
Dynamic Content No 
Event Triggered Email No 
Image Library No 
Landing Pages/Web Forms No 
Mailing List Management No 
Mobile Optimized Emails No 
Reporting/Analytics No 
Subscriber Management No 
Template Management No 
WYSIWYG Email Editor No 

Email Template Design

A/B Testing No 
Code From Scratch No 
Drag & Drop Editing No 
Image Library No 
Import HTML Code No 
Mobile-Friendly / Responsive No 
Potential Issue Identification No 
Premade Templates No 
Proofing No 
Reporting / Analytics No 
Text Editor No 
Theme Editor No 

Product Features

Email Marketing

A/B Testing No 
Artificial Intelligence No 
Auto-Responders No 
CAN SPAM Compliance No 
Customer Surveys No 
Drip Campaigns No 
Dynamic Content No 
Event Triggered Email No 
Image Library No 
Landing Pages/Web Forms No 
Mailing List Management No 
Mobile Optimized Emails No 
Reporting/Analytics No 
Subscriber Management No 
Template Management No 
WYSIWYG Email Editor No 

Transactional Email

A/B Testing No 
Contact Database No 
Dynamic Content No 
Email Monitoring No 
Mailing List Management No 
Reporting/Analytics No 
Spam Check No 
Template Management No 

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