# matcornic/hermes

Golang package that generates clean, responsive HTML e-mails for sending transactional mail

Repository: https://github.com/matcornic/hermes
Canonical: https://ross.abutalabs.com/products/matcornic-hermes
Language: Go
License: Apache-2.0
License Family: permissive
Topics: golang, hermes, generator, mailgen, smtp, template, templating, email, emails, email-template-generator, email-template, awesome-go
Last push: 2025-04-04T08:12:02+00:00

## Health v2 (maintenance only)
Score: 29/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 14, release rhythm 8, longevity 100
- inputs: {"age_days": 3448, "days_push": 516, "days_rel": 516, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3024, forks 248 (observed 2026-08-28T04:07:38.599704+00:00)

## What it is
Hermes is a Go package that generates clean, responsive HTML emails for transactional mail such as welcome, password-reset, and receipt emails, with plain-text fallbacks. It is a Go port of the Node.js mailgen engine and supports configurable themes and product branding.

## Use cases
- generate transactional email html in go
- send welcome and password reset emails with nice templates
- responsive html email templates for receipts
- plain text fallback for html emails
- branded email templates for a go application

## When to choose
- you build a Go backend that sends transactional emails
- you want prebuilt responsive email themes without hand-writing HTML
- you need both HTML and plain-text versions of an email

## When to avoid
- you need to actually send emails over SMTP - Hermes only generates the content
- your stack is Node.js, where the original mailgen may fit better
- you need highly custom, pixel-perfect email designs beyond the provided themes

## Facets
- artifact type: library
- maturity: active
- function: templating, email
- domain: email, web-development, backend
- platform: go, cross-platform
- tags: email-templates, transactional-email, html-email, responsive-email, mailgen

## Member repositories
- matcornic/hermes (main) score 29

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:38.599704+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 2026-08-29T18:46:52.723614+00:00, confidence not recorded.
  - readme: https://github.com/matcornic/hermes (fetched 2026-08-28T04:07:38.599704+00:00, sha fd3b9ebb4fd3)
- Data as of 2026-08-30T08:39:29.467469+00:00.