GlockApps

GlockApps combines seed-list inbox testing, spam test credits, DMARC analytics, uptime monitoring, and postmaster tooling. It is useful when a marketing or growth team needs to inspect where campaigns land across mailbox providers before and after sending.

At an early stage the deciding factors are what the free tier actually covers, what the first paid invoice looks like, and how much of a founding engineer's week the setup costs. Feature depth that only matters at a million sends a month is noise until it is not.

Against a waitlist, a launch announcement, onboarding email, and the first transactional sends, GlockApps covers developer experience, and does not cover scheduling, SDK breadth, and webhook coverage. Whether that gap matters depends on how central those are to the build.

• Free tier: Free plan with 2 Inbox Insight tests once and 10,000 DMARC messages/mo
• Best published rate per 1,000: Tiers not published in comparable form
• Starts at: $59/mo billed annually for Essential
• DX score: 7/10
• Deliverability: Not a sender. Measures inbox placement and DMARC alignment so teams can diagnose deliverability problems before blaming the ESP.
• Operating since: Not published
• Scheduling: No
• SDKs: None
• Webhooks: No

Not a sender. Measures inbox placement and DMARC alignment so teams can diagnose deliverability problems before blaming the ESP.

Growth and marketing teams that regularly test inbox placement across Gmail, Outlook, and other mailbox providers.

Teams that only need SPF, DKIM, and DMARC setup checks.