Emailens checks how HTML email designs appear in 21 email clients, with compatibility scores from 0 to 100 based on 298 CSS and HTML features. It accepts HTML, React Email JSX, MJML, and Maizzle, and produces rendered screenshots and simulated dark mode versions. You can use it through a web app, REST API, MCP server, GitHub Action, or standalone @emailens/engine package. Campaign HTML can be imported from a view-in-browser link; Mailchimp URL import is verified, while the page instructs users to paste HTML for other listed platforms. It also discusses merge tags for Mailchimp, Klaviyo, HubSpot, Braze, and Salesforce Marketing Cloud. The free plan provides 30 simulated previews per day and a seven-day audit history. Dev costs 9.00 USD per month, Pro 19.00 USD per month, and Team 49.00 USD per month. Emailens says unsaved previews are processed in memory, while authenticated previews and screenshots are purged after 30 days. It states that connections use TLS 1.3 and stored data uses AES-256 encryption at rest.
Who it is for
The free plan is described as suited to hobbyists and individual developers; Dev is aimed at freelance developers, indie hackers, and creators. Its API and development integrations may suit teams incorporating email previews into their workflows.
What is good
- Previews across 21 email clients.
- Accepts HTML, React Email JSX, MJML, and Maizzle.
- Offers a web app, REST API, MCP server, and GitHub Action.
- Free plan includes 30 previews per day.
- States TLS 1.3 connections and AES-256 encryption at rest.
What to know first
- No free trial is listed.
- Free plan has a 30-preview daily limit.
- Mailchimp URL import is the only verified URL import.
- Authenticated previews and screenshots are purged after 30 days.
Verdict
Emailens combines multi-client rendering previews with compatibility scores and developer-focused integrations. The free plan provides a way to use the service, while higher listed plans add larger preview allowances and other plan-specific limits.
Emailens plans and pricing
All plansCompared on email testing software
- Free plan
- Yes
- Paid from
- $9/mo
- Email clients
- 21 clients
- Device coverage
- both
- Spam checks
- Yes
- Accessibility checks
- Yes
- Link checks
- Yes
- Inbox testing
- Yes
- API access
- Yes
