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.

A SaaS product sends on behalf of its customers, so the deciding factors are tenant isolation, whether suppressions can be scoped rather than global, and whether support can answer why one specific account did not receive one specific email. Lifecycle automation and transactional sending usually need to coexist.

Against trial expiry notices, dunning, onboarding sequences, and per-tenant transactional mail, GlockApps covers multi-tenant support and event stream, and does not cover the suppressions API, scheduling, and webhook coverage. Whether that gap matters depends on how central those are to the build.

• Multi-tenant: Yes
• Event stream: Yes
• Suppressions API: No
• Operating since: Not published
• Scheduling: No
• Best published rate per 1,000: Tiers not published in comparable form
• Deliverability: Not a sender. Measures inbox placement and DMARC alignment so teams can diagnose deliverability problems before blaming the ESP.
• Webhooks: No
• Starts at: $59/mo billed annually for Essential

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.