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.

The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.

Against password resets, receipts, and magic links shipped from application code, GlockApps covers developer experience and event stream, and does not cover SDK breadth, idempotency keys, and webhook coverage. Whether that gap matters depends on how central those are to the build.

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

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.