Emailens vs GlockApps
Emailens
emailens.dev
GlockApps
glockapps.comSide by side
| Figure | Emailens | GlockApps |
|---|---|---|
| Price from | $9/mo | $59/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | Yes | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 7 | 4 |
| Spec score · Email Testing Software | 9.4 (#1) | 9.0 (#2) |
| Data retention | Unsaved previews are processed in memory, while authenticated previews and screenshots are automatically purged after 30 days. | Inbox Insight reports, messages and raw test data are retained for 12 months, message headers for 30 days, and free-checker reports for 30 days. |
| Integrations | The product offers a web app, REST API, MCP server, GitHub Action, and standalone @emailens/engine package. | The company lists Return Path, Mailchimp, SpamAssassin, Amazon SES, SparkPost, Mailgun, SendGrid and Slack among its integrations. |
| Purpose | Emailens previews and checks how HTML emails render across 21 email clients. | GlockApps provides tools to test and monitor email deliverability and troubleshoot placement problems before emails are sent. |
| Support | The security page says vulnerability reports are acknowledged within 48 business hours. | GlockApps lists a Help Center and step-by-step tutorials, and says its DMARC support specialists have more than 15 years of experience. |
| What it does | Emailens previews and audits HTML email rendering across 21 email clients, producing compatibility scores, warnings, dark-mode variants and screenshots. | GlockApps is a hosted email-deliverability and email-security suite that tests inbox placement, authentication, reputation, blocklists and content. |
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.
GlockApps
GlockApps helps marketers and businesses check email deliverability and investigate placement problems before sending campaigns. Inbox Insight shows whether test messages reach inboxes, spam folders, or subfolders at different providers, and checks them against SpamAssassin, Barracuda, Microsoft Exchange Online Protection, Proofpoint, and a Google filter. Reputation tools check IPs and domains against blocklists and report sender scores and placement by IP. Content analysis covers message size, images, and links, with an HTML compatibility checker. DMARC Analytics collects reports, tracks sending sources, and retains reports for a year. Uptime Monitor checks IPs, SPF, DKIM, DMARC, HTTP, TLS, and TCP, with checks configurable as often as every minute. The API supports automated testing, result retrieval, and client management by projects and folders on all plans, including free. GlockApps runs on the web and through an API. Its free plan includes two spam test credits; paid plans start at $59 a month, billed annually at $708.