A self-hosted transactional email service that renders MJML templates and sends via SMTP.
Catapulte is an open-source, self-hosted mailer designed for sending transactional emails efficiently. It addresses frustrations with commercial email providers by offering a solution that prioritizes speed, data privacy, and ease of template management through MJML-based templates. It operates by rendering templates, interpolating data, and sending emails via an SMTP server.
Development teams in startups or large companies that need a self-hosted, privacy-focused solution for transactional emails, especially those with non-technical team members who need to edit email templates. It is also suitable for organizations restricted by data sovereignty policies or corporate proxies.
Developers choose Catapulte over commercial providers because it offers full control over infrastructure, ensures data privacy by avoiding external services subject to regulations like the Patriot Act, and simplifies template management with MJML, allowing non-technical colleagues to edit emails without developer intervention.
Rust implementation of catapulte email sender
Open-Awesome is built by the community, for the community. Submit a project, suggest an awesome list, or help improve the catalog on GitHub.
Catapulte runs on your own infrastructure, ensuring data privacy and compliance with regulations by avoiding external services subject to laws like the Patriot Act, as emphasized in the README.
Uses MJML to allow non-technical team members to edit responsive email templates without developer intervention, addressing the frustration of frequent template changes mentioned in the motivation.
Sends emails through any SMTP server, including cost-effective options like Amazon SES, providing control over sending infrastructure and avoiding vendor lock-in.
Offers a RESTful API with JSON or multipart support for attachments and allows sending to multiple recipients in one call, reducing API overhead for batch operations.
Requires setting up and managing an external SMTP server separately, adding configuration complexity and potential points of failure compared to all-in-one solutions.
Focuses on basic transactional email sending and lacks built-in features like email tracking, analytics, or marketing automation tools found in commercial providers.
Deployment involves Docker and multiple environment variables, demanding technical expertise for setup and ongoing maintenance, as seen in the README's configuration instructions.
catapulte is an open-source alternative to the following products:
Mailgun is a cloud-based email service and API for sending, receiving, and tracking transactional and marketing emails for applications.
Mailchimp is an all-in-one marketing platform for small businesses, offering email marketing, automation, CRM, and audience management tools.
Sendinblue is an all-in-one digital marketing platform offering email marketing, SMS campaigns, CRM, and marketing automation tools.
SendGrid is a cloud-based email delivery platform that provides transactional and marketing email services with APIs for developers.