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What is Mailrith?

Mailrith is an email marketing and automation platform for startups, creators, newsletter businesses, small companies, agencies, and growing teams. It helps users grow their audience through hosted forms, embedded forms, and landing pages. Subscribers can then be organized using tags, custom fields, and dynamic segments. Users can send Broadcasts, build automated Sequences, create visual Automations, manage reusable email templates, and use Magic Links to trigger actions when a Subscriber clicks a link. Mailrith works with Amazon SES, Postmark, SendGrid, Mailgun, Resend, Brevo, and custom SMTP servers, allowing users to choose their own email-sending provider and maintain greater control over costs and deliverability. It also includes team workspaces, permissions, APIs, webhooks, OAuth integrations, and TypeScript and Python SDKs, making it suitable for both standard email marketing and more advanced business workflows.

What is Coldletter?

Coldletter is a product email platform that combines visual email design, template management, automation, and developer-friendly delivery workflows in one workspace. The platform is built to sit on top of existing sending providers, including SendGrid, Postmark, Amazon SES, Mailgun, Resend, and SparkPost. This allows teams to improve how emails are created and managed while continuing to rely on trusted providers for actual delivery. Coldletter’s editor lets users design emails like documents, using drag-and-drop blocks, reusable partials, typed variables, and real-time previews. Templates are built to be responsive, accessible, and dark-mode-safe, reducing the need for manual table-based HTML or MJML workarounds. Developers can send any template with one API call while Coldletter merges customer data, renders the email, chooses the configured route, and handles delivery safeguards. The platform also includes automation journeys with triggers, delays, branching logic, A/B testing, and scheduled sends. Teams can manage template versions like code, review diffs, roll back changes, run test sends, and require approvals before updates reach production. Localization features allow companies to create translated template variants that resolve automatically at send time. Unified analytics help teams track opens, clicks, bounces, and deliverability across multiple providers. Coldletter helps product, lifecycle, design, and engineering teams create better emails faster while keeping delivery reliable and workflows organized.

Media

Media

No images available

Integrations Supported

Amazon SES
Postmark
SendGrid
Brevo
ChatGPT
Claude
Mailgun
Resend
Zapier

Integrations Supported

Amazon SES
Postmark
SendGrid
Brevo
ChatGPT
Claude
Mailgun
Resend
Zapier

API Availability

Has API

API Availability

Has API

Pricing Information

$29/month
Fixed Pricing (Pricing doesn't increase with number of subscribers or emails sent)

Available Plans:
1. Solo Plan - $29/month or $290/year
2. Pro Plan - $49/month or $490/year
3. Agency Plan - $149/month or $1490/year (Additional Workspaces available at $12/month/workspace)
Free Version
Free Trial Offered?

Pricing Information

$0
Free Version
Free Trial Offered?

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Mailrith

Date Founded

2026

Company Location

India

Company Website

mailrith.com

Company Facts

Organization Name

Optosoftware inc.

Date Founded

2025

Company Location

Canada

Company Website

coldletter.com

Categories and Features

Email Marketing

A/B Testing
Artificial Intelligence
Auto-Responders
CAN SPAM Compliance
Customer Surveys
Drip Campaigns
Dynamic Content
Event Triggered Email
Image Library
Landing Pages/Web Forms
Mailing List Management
Mobile Optimized Emails
Reporting/Analytics
Subscriber Management
Template Management
WYSIWYG Email Editor

Categories and Features

Email Marketing

A/B Testing
Artificial Intelligence
Auto-Responders
CAN SPAM Compliance
Customer Surveys
Drip Campaigns
Dynamic Content
Event Triggered Email
Image Library
Landing Pages/Web Forms
Mailing List Management
Mobile Optimized Emails
Reporting/Analytics
Subscriber Management
Template Management
WYSIWYG Email Editor

Email Template Design

A/B Testing
Code From Scratch
Drag & Drop Editing
Image Library
Import HTML Code
Mobile-Friendly / Responsive
Potential Issue Identification
Premade Templates
Proofing
Reporting / Analytics
Text Editor
Theme Editor

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