Emailens vs Mailosaur
Emailens
emailens.dev
Mailosaur
mailosaur.comSide by side
| Figure | Emailens | Mailosaur |
|---|---|---|
| Price from | $9/mo | $20/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 7 | 3 |
| Spec score · Email Testing Software | 9.4 (#1) | 7.9 (#14) |
| Encryption | The security page states that connections use TLS 1.3 and databases and object storage use AES-256 encryption at rest. | Mailosaur says its systems use current encryption protocols and cipher suites, with AES-256 encryption at rest. |
| Integrations | The product offers a web app, REST API, MCP server, GitHub Action, and standalone @emailens/engine package. | Mailosaur lists integrations and guides for frameworks and tools including Cypress, Playwright, Selenium, Cucumber, Robot Framework, Postman, Insomnia, WebdriverIO, TestCafe, PowerShell, and Ghost Inspector. |
| Support | The security page says vulnerability reports are acknowledged within 48 business hours. | The Enterprise plan includes advanced support and SLAs, an account manager, and support for custom terms. |
Plans
Emailens
- FreeFree
- FreeFree
- Dev$9 a month
- Dev$9 a month
- Pro$19 a month
- Pro$19 a month
- Team$49 a month
In their own words
Emailens
Emailens previews HTML email rendering across 21 email clients and checks compatibility across 298 CSS and HTML features. It scores compatibility from 0 to 100 per client and provides rendered screenshots and simulated dark mode variants. Inputs include HTML, React Email JSX, MJML, and Maizzle. Developers can use 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 marked verified, while other listed platforms require pasted HTML. Emailens discusses merge tags for Mailchimp, Klaviyo, HubSpot, Braze, and Salesforce Marketing Cloud. The free plan costs nothing and includes 30 simulated previews per day, all 21 clients, one monitored domain, seven-day audit history, and three AI Fixes. Paid plans are Dev at $9 a month, Pro at $19 a month, and Team at $49 a month. Emailens says unsaved previews are processed in memory and authenticated previews and screenshots are purged after 30 days.