MJML
Markup language for responsive email.
MJML is a markup language that compiles to table-based HTML that renders consistently in Outlook and Gmail. Vendor-neutral, broad framework integrations including mjml-react.
A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.
Against trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail, MJML covers none of the capabilities this audience leans on (multi-tenant support, event stream, the suppressions API, scheduling, and webhook coverage), so it fits only where those needs are genuinely absent.
- Multi-tenant: No
- Event stream: No
- Suppressions API: No
- Operating since: Not published
- Scheduling: No
- Best published rate per 1,000: Tiers not published in comparable form
- Deliverability: Not applicable.
- Webhooks: No
- Starts at: Free
Not applicable.
Polyglot teams needing a vendor-neutral template language.
- › Mature, language-agnostic
- › Excellent rendering across clients
- › XML-style syntax can feel verbose
Features at a glance
| API | No |
| SMTP | No |
| SDKs | None |
| Webhooks | No |
| Templates | rich |
| React Email | No |
| Batch send | No |
| Scheduled send | No |
| Suppressions | No |
| Multi-tenant | No |
| Inbound parsing | No |
| Event stream | No |
| Idempotency keys | No |
| Dedicated IP | No |
Appears in rankings
6 Best Email Template Engines (2026), Tested
Mature, vendor-neutral, and purpose-built to compile responsive markup into the table-based HTML older clients still require.
12 Best Open-Source Email Tools (2026), Tested
Vendor-neutral template language.
7 Best HTML Email Builders (2026), Tested
The most established abstraction for responsive email HTML, with portable output and broad provider support.