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What is sendbunny?

Sendbunny is a self-hosted email solution offering a modern alternative to platforms such as Resend, SendGrid, Mailgun, and Mailchimp, particularly designed for developers and businesses aiming to reduce their email costs while enjoying unlimited contacts and full control over their customer data. You can effortlessly deploy it to your AWS account with just three clicks, bypassing the complexities of terminal commands or YAML configurations, which allows you to make a one-time payment instead of a growing monthly fee as your contact list expands; furthermore, you can utilize your own AWS infrastructure for sending emails. This platform provides a cohesive interface for managing both transactional and marketing emails, encompassing unlimited contacts, audiences, campaigns, templates, sending domains, APIs, suppressions, and analytics in one place. By choosing Sendbunny, you maintain authority over your infrastructure, your data, and your sending reputation, thereby alleviating worries related to vendor lock-in or per-contact charges. It is particularly advantageous for developers, SaaS teams, startups, agencies, and businesses focused on minimizing email service provider costs while still accessing essential email features. Opting for Sendbunny not only streamlines your email processes but also enhances your organizational capabilities on AWS, making it a strategic choice for future growth.

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

No images available

Media

No images available

Integrations Supported

Integrations Supported

Amazon SES
Postmark
SendGrid

API Availability

API Availability

Pricing Information

$199 one-time license fee

Pricing Information

$0
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Not specified

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

sendbunny

Date Founded

2026

Company Location

United States

Company Website

sendbunny.co

Company Facts

Organization Name

Optosoftware inc.

Date Founded

2025

Company Location

Canada

Company Website

coldletter.com

Categories and Features

Email Marketing

Not specified

Transactional Email

Not specified

Categories and Features

Email Marketing

Not specified

Email Template Design

Not specified

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