GlockApps
7.4#4 in email deliverability softwareFrom $59 a monthFree planWebAPI
VisitGlockApps vs MailTester
MailTester
6.0#18 in email testing softwareFree planFree planWebAPISelf-hosted
VisitWhat both publish
| Fact | GlockApps | MailTester |
|---|---|---|
| API | The API supports automated testing, programmatic result retrieval, and client management by projects and folders, and the page says it is available on all plans including free. | The API can create test addresses and read report status and scores as JSON. |
| Content analysis | Content Analysis evaluates message size, images, links and HTML/CSS compatibility across email clients. | It analyzes HTML, text/image ratio, links, subject, List-Unsubscribe, and Message-ID. |
| Data retention | 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. | The FAQ says messages are kept only as long as needed to show the report. |
| Purpose | GlockApps provides tools to test and monitor email deliverability and troubleshoot placement problems before emails are sent. | MailTester checks why emails may land in spam and returns a deliverability score out of 10. |
| Support | GlockApps lists a Help Center and step-by-step tutorials, and says its DMARC support specialists have more than 15 years of experience. | The contact page says inquiries receive a reply within one business day. |
GlockApps plans
- FreeFree
- Essential$59 a month
- Growth$99 a month
- Enterprise$129 a month
MailTester plans
- FreeFree
Pick GlockApps if…
GlockApps suits marketers and businesses that want to check email placement before sending to subscribers and monitor sender authentication or reputation. Its API is available to users on the Free plan as well as paid plans.
Pick MailTester if…
MailTester may suit people checking email deliverability, monitoring multiple domains, or seeking API access and a tailored plan. Newsletter senders can use its bulk-email checks for unsubscribe handling, message size, and text-to-image ratio.