IN THE FIELD GUIDE
Emailens
emailens.dev
Emailens is an email QA tool that previews how HTML emails render across 21 email clients including Gmail, Outlook, and Apple Mail. It provides compatibility scoring, dark mode simulation, spam analysis, link validation, accessibility checking, image optimization, and deliverability checks in one API call.
THE PRODUCT, BEYOND THE PITCH
Editorially reviewed · Sources checked Oct 5, 2026
A good fit for
- Developers building emails with React Email, MJML, Maizzle, or raw HTML
- Teams needing to ensure email compatibility across major clients without per-client fees
Know the limitations
- Previews are simulated instantly by a rendering engine, not real device screenshots
- Team plan with seats and shared workspace is not yet built
What you can do
- Check email rendering compatibility across multiple clients before sending
- Integrate email rendering QA into CI/CD pipelines to prevent broken emails
Features
- Compatibility scoring from 0 to 100 per client
- Dark mode simulation and inversion
- Spam scoring with heuristic content analysis
- Link validation catching broken hrefs and insecure links
- Accessibility audit checking color contrast, alt text, heading hierarchy, lang attributes, and table semantics
Integrations
- Works with Mailchimp, Klaviyo, HubSpot, Braze, and Salesforce Marketing Cloud by importing campaigns via view-in-browser URL
- API supports gating sends by returning a boolean to block regressed campaigns in Zapier or CI
Platforms & data export
- Available as web app, CLI, REST API, MCP server, GitHub Action, and npm packages
- Supports 21 email clients including Gmail (web, Android, iOS), Outlook (web, new, classic), Apple Mail (macOS, iOS), Yahoo Mail, Samsung Mail, Thunderbird, HEY Mail, Superhuman
THE COST FOR YOUR TEAM
Go beyond the starting price.
Published plan prices for your team size and usage. Results update as you type. Taxes, currency conversion and unlisted add-ons are excluded, and anything the source did not state is called out rather than guessed.
Cheapest fit for 1 person, all 1 tools
$9.00/month
$108.00 a year on these plans.
| Tool / plan | Monthly | Per year | What this assumes |
|---|---|---|---|
DevCheapest fit Flat subscription | $9.00 | $108.00 | Automatically extracted from the linked pricing source. Seat allowances, usage limits, taxes and terms are not confirmed — check them with the provider. |
Pro Flat subscription | $19.00 | $228.00 | Automatically extracted from the linked pricing source. Seat allowances, usage limits, taxes and terms are not confirmed — check them with the provider. |
A practical workflow
- Build email in React Email, MJML, Maizzle, or raw HTML
- Preview email rendering across 21 clients in editor, CLI, or browser
- Fix issues with framework-native snippets, run CI checks, and ship
Based on the sources below. Editorial review does not imply hands-on product testing.
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