SparkPost/heml
HEML is an open source markup language for building responsive email. observed · 2026-08-28
Health v2 · maintenance only
23/100
- Activity 0
- Release rhythm 8
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 3250
- days_rel: n/a
- days_push: 2397
- n_releases_24m: 0
Adoption not part of the score
4298 stars · 156 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
HEML is an open source XML-based markup language and framework for building responsive HTML emails, developed by SparkPost. It compiles HEML elements and CSS into email-client-compatible HTML, handling quirks across dozens of email clients.
Use cases
- build responsive html emails
- create email templates that work across clients
- convert a markup language into email-safe html
- design marketing emails without dealing with email quirks
- extend email elements with custom components
When to choose
- you know HTML and CSS and want a native-feeling way to build emails
- you need responsive emails that render consistently across email clients
- you want an extendable markup language for email templating
When to avoid
- you need a tool with active development and recent releases
- you prefer template systems integrated into your existing web framework
- you need drag-and-drop visual email building rather than code
Facets
framework · maturity maintenance
templating email build-tool email web-development frontend cli cross-platform responsive-email markup-language email-templates html-email sparkpost nodejs
5 sources
- readme: https://github.com/SparkPost/heml · fetched 2026-08-28 · 046ead79416f
- homepage: https://heml.io · fetched 2026-08-29 · 870bd4b9d7c4
- site_page: https://heml.io/docs/getting-started/guide · fetched 2026-08-29 · f18be39b8748
- site_page: https://heml.io/docs/getting-started/overview · fetched 2026-08-29 · da721c93e0e7
- registry_npm: https://registry.npmjs.org/heml · fetched 2026-08-29 · 6a10fe21b56c
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| SparkPost/heml | main | 23 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem