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What is TOPOL.io?

Utilize our Drag & Drop Template Builder to effortlessly design responsive HTML emails without needing any design or coding expertise. You can swiftly assemble HTML emails and templates, eliminating the need for HTML developers or graphic designers. Our user-friendly drag-and-drop editor streamlines the process of crafting professional-grade emails. You can produce HTML emails that are visually appealing across desktops, mobile devices, and various email clients. Whether you are a freelance designer or an email marketing expert, if you aim to create stunning emails or incorporate an HTML editor into your application, this solution is perfect for collaborative efforts. You have the ability to design templates, save reusable blocks, organize your templates in folders, and share the WYSIWYG Email Builder with up to two of your colleagues. Enjoy unlimited access to a variety of pre-made templates for custom modifications, along with a vast selection of complimentary images to enhance your designs. With these tools at your disposal, crafting beautiful emails has never been easier or more accessible.

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

SendGrid
AWeber
ActiveCampaign
Amazon SES
Campaign Monitor
Constant Contact
Ecomail
Gmail
Google Cloud Storage
HubSpot CRM
Klaviyo
Mailchimp
MailerLite
Mailgun
Mailjet
Microsoft Outlook
Postmark
SendPulse
Sendy
iContact

Integrations Supported

SendGrid
AWeber
ActiveCampaign
Amazon SES
Campaign Monitor
Constant Contact
Ecomail
Gmail
Google Cloud Storage
HubSpot CRM
Klaviyo
Mailchimp
MailerLite
Mailgun
Mailjet
Microsoft Outlook
Postmark
SendPulse
Sendy
iContact

API Availability

Has API

API Availability

Has API

Pricing Information

$10 per month
Free Trial Offered?
Free Version

Pricing Information

$0
Free Trial Offered?
Free Version

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

TOPOL.io

Date Founded

2017

Company Location

Prague, Czech Republic

Company Website

topol.io

Company Facts

Organization Name

Optosoftware inc.

Date Founded

2025

Company Location

Canada

Company Website

coldletter.com

Categories and Features

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

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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