# emailmonday/Cerberus

A few simple, but solid patterns for responsive HTML email templates and newsletters. Even in Outlook and Gmail.

Repository: https://github.com/emailmonday/Cerberus
Canonical: https://ross.abutalabs.com/products/cerberus
Homepage: https://www.cerberusemail.com/
Language: HTML
License: MIT
License Family: permissive
Topics: responsive-email, html-email, newsletter, email, email-boilerplate, email-template, hybrid-email, cerberus
Last push: 2024-07-16T01:43:44+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4670, "days_push": 779, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5129, forks 696 (observed 2026-08-28T04:09:10.975376+00:00)

## What it is
Cerberus is a set of annotated, responsive HTML email template patterns designed to work across popular email clients including Outlook and Gmail. It provides compartmentalized code blocks (fluid, responsive, and hybrid layouts) that can be combined and nested to build emails.

## Use cases
- build responsive html email templates
- create newsletters that work in outlook and gmail
- boilerplate for transactional email layouts
- accessible html email patterns
- email templates without a framework or esp lock-in

## When to choose
- you hand-code HTML emails and need reliable cross-client patterns
- you need emails that render well in Outlook, Gmail, and mobile clients
- you want annotated, copy-paste email code usable with any ESP

## When to avoid
- you need a full email design tool or drag-and-drop builder
- you want a framework or library with programmatic APIs rather than static templates
- you need MJML-style compilation or component systems

## Facets
- artifact type: learning-resource
- maturity: maintenance
- function: templating, email, ui-components
- domain: email, web-development, frontend
- platform: cross-platform
- tags: html-email, responsive-email, email-templates, newsletter, outlook-compatibility, email-boilerplate, boilerplate

## Member repositories
- emailmonday/Cerberus (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:10.975376+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T08:31:23.061161+00:00, confidence not recorded.
  - readme: https://github.com/emailmonday/Cerberus (fetched 2026-08-28T04:09:10.975376+00:00, sha b49725333e56)
  - homepage: https://www.cerberusemail.com/ (fetched 2026-08-29T08:56:36.020788+00:00, sha ede5a14c1805)
- Data as of 2026-08-30T08:39:29.467469+00:00.