Average Ratings 0 Ratings

Total
ease
features
design
support

No User Reviews. Be the first to provide a review:

Write a Review

Average Ratings 0 Ratings

Total
ease
features
design
support

No User Reviews. Be the first to provide a review:

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

Drip Drop is a marketing automation platform for email and SMS that utilizes your existing provider accounts. By integrating with services like SendGrid, Mailgun, Gmail, Outlook, SMTP, Twilio, or Telnyx, you can send messages at the cost set by your provider, without any additional fees per contact beyond your standard charges. The platform features an intuitive drag-and-drop flow builder that allows you to create campaigns with various components, including triggers, delays, branching paths, and scheduling that respects time zones, incorporating both email and SMS at different stages. You can import and manage your contacts efficiently, segment them with tags and custom fields, utilize templates, or even have AI generate your content, while also monitoring key metrics such as opens, clicks, and delivery rates for each campaign. Furthermore, it integrates seamlessly with your existing systems through webhooks and a public API, and it includes built-in functionalities for managing unsubscribes, handling STOP/HELP requests, and ensuring compliance with consent requirements, making it a comprehensive tool for marketing automation. Additionally, the user-friendly interface simplifies the process of managing multiple campaigns concurrently.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

No images available

Screenshots View All

Integrations

SendGrid Yes 
Amazon SES Yes 
Gmail No 
Mailgun No 
Microsoft Outlook No 
Postmark Yes 
Telnyx No 
Twilio No 

Integrations

SendGrid Yes 
Amazon SES No 
Gmail Yes 
Mailgun Yes 
Microsoft Outlook Yes 
Postmark No 
Telnyx Yes 
Twilio Yes 

Pricing Details

$0
Free Trial No 
Free Version Yes 

Pricing Details

Free
Free Trial Yes 
Free Version Yes 

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 Yes 

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

Drip Drop

Founded

2025

Country

United States

Website

dripdrop.dev/

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 

Marketing Automation

A/B Testing No 
Analytics / ROI Tracking No 
Artificial Intelligence No 
Content / Blogging Platform No 
Customizable CTAs No 
Drip Campaigns No 
Dynamic Content No 
Landing Pages / Web Forms No 
Lead Scoring No 
Sales Intelligence No 
Search Marketing No 
Segmentation No 
Social Marketing No 
Website Visitor Tracking No 

SMS Marketing

2-Way Messaging No 
Artificial Intelligence No 
Contact Management No 
MMS No 
Mass Texting No 
Message Personalization No 
Mobile Coupons No 
Mobile Keywords No 
Polls / Voting No 
Reporting/Analytics No 
Scheduled Messaging No 
Shortcodes No 
Text-to-Win No 

Alternatives

AledaMail Reviews

AledaMail

Senders

Alternatives

SendGrid Reviews

SendGrid

Twilio SendGrid
SendGrid Reviews

SendGrid

Twilio SendGrid