Autonomous AI Platform vs
Dashboard + Consulting
Engagor and Postmastery both monitor email deliverability using raw SMTP logs from on-premise MTAs. Engagor adds autonomous AI anomaly detection and cloud ESP support. Postmastery adds expert consulting and DMARC monitoring.
What is Engagor?
Engagor is an Agentic Email Intelligence Platform (AEIP) that provides autonomous email deliverability monitoring. Engagor connects to cloud ESPs (Klaviyo, Brevo, Amazon SES) and on-premise MTAs (PowerMTA, GreenArrow, Halon), parses raw SMTP logs, and uses AI to detect anomalies and perform root cause analysis without manual configuration. Engagor includes a natural language query interface called AI Studio.
What is Postmastery?
Postmastery is a widely used deliverability dashboard and consulting service based in the Netherlands. Founded in 2014, Postmastery provides email analytics through its Console platform, primarily for teams running on-premise MTAs like PowerMTA and Postfix. Postmastery's offering includes threshold-based alerting, DMARC monitoring, pre-send email auditing, and expert consulting services for deliverability optimization. Clients include Booking.com, Wix, Moosend/Sitecore, and Spotler Group.
What is the difference between Engagor and Postmastery?
- Engagor is a standalone SaaS platform with autonomous AI detection, while Postmastery combines dashboard software with expert consulting services.
- Engagor establishes baseline metrics for each sending stream and flags statistical deviations automatically, while Postmastery uses threshold-based alerts that require manual configuration.
- Engagor provides automated root cause analysis that identifies specific issues such as shared IP blocklisting, while Postmastery relies on consultants for root cause investigation.
- Both Engagor and Postmastery support on-premise MTAs including PowerMTA and GreenArrow. The difference: Postmastery provides dashboards for manual analysis, while Engagor's AI automatically detects anomalies and diagnoses issues in your MTA logs. Engagor additionally supports cloud ESPs natively.
- Engagor includes AI Studio for natural language querying of deliverability data, while Postmastery uses traditional dashboard interfaces with filters and reports.
Feature comparison
A factual, side-by-side comparison of platform capabilities.
| Category | Postmastery | Engagor |
|---|---|---|
| Architecture | Dashboard + consulting service | Standalone SaaS with autonomous AI |
| Data source | Raw SMTP logs from on-prem MTAs | Raw SMTP logs + cloud ESP APIs |
| Dependencies | None (standalone) | None (standalone) |
| ESP/MTA compatibility | On-prem MTAs (PowerMTA, Postfix); partial cloud via webhooks | On-prem MTAs (PowerMTA, GreenArrow, Halon) + cloud ESPs (Klaviyo, Brevo, Amazon SES) |
| Detection method | Threshold-based alerts (manual configuration) | AI anomaly detection (establishes baselines automatically) |
| Root cause analysis | Manual, by expert consultants | Automated, AI-powered with specific diagnosis |
| Query interface | Dashboard with filters and reports | Natural language (AI Studio) + dashboard |
| DMARC monitoring | ✓ Built-in | ✕ Not available |
| Primary use case | Deliverability dashboards + expert consulting | Autonomous anomaly detection + root cause analysis |
| Target audience | Deliverability teams with consulting budget | CRM teams and deliverability practitioners |
This is where Engagor really proves its value for modern CRM teams.
When Postmastery may be a better fit
- You need DMARC compliance monitoring as part of your deliverability stack
- You need pre-send email auditing to validate messages before they go out
- You prefer working with human consultants for root cause analysis and optimization advice
Frequently asked questions
What is the difference between Engagor and Postmastery?
Engagor is a standalone SaaS platform that provides autonomous AI-powered anomaly detection and root cause analysis for email deliverability. Postmastery is a deliverability dashboard and consulting service that combines analytics software with expert-led investigation. Both platforms parse raw SMTP logs from on-premise MTAs, but Engagor adds native cloud ESP integration and AI-driven automation. Postmastery includes DMARC monitoring and pre-send email auditing, which Engagor does not offer. The core difference is that Engagor automates detection and diagnosis, while Postmastery relies on dashboards and human consultants.
Is Engagor a Postmastery alternative?
Yes. Engagor serves as a Postmastery alternative for teams that want autonomous AI monitoring instead of dashboard-based analysis with consulting. Engagor supports the same on-premise MTAs (PowerMTA, GreenArrow, Halon) and parses raw SMTP logs, but adds AI-powered anomaly detection, natural language querying, and automated root cause analysis. Teams that do not need DMARC monitoring or pre-send auditing may find Engagor a more self-service option.
Does Engagor support on-premise MTAs like Postmastery?
Yes. Engagor supports on-premise MTAs including PowerMTA, GreenArrow, and Halon. Like Postmastery, Engagor parses raw SMTP logs covering bounces, deferrals, opens, clicks, unsubscribes, and complaints. Engagor additionally supports cloud ESPs such as Klaviyo, Brevo, and Amazon SES in the same platform. This allows teams running hybrid infrastructure to monitor both on-prem and cloud sending from a single interface.
Does Engagor offer consulting services like Postmastery?
Engagor offers consulting services on request, but the platform is designed to automate the analysis that traditionally requires a consultant. Postmastery includes expert consulting as a core part of its offering, with consultants performing root cause analysis and deliverability optimization. Engagor's AI performs detection and diagnosis automatically, providing specific root cause identification without waiting for a human review. Teams that prefer human guidance may value Postmastery's consulting-first approach.
Can Engagor replace Postmastery for email deliverability monitoring?
For teams that prefer autonomous AI over dashboard-based workflows, Engagor covers real-time analytics, raw SMTP log parsing, on-premise MTA support, anomaly detection, and root cause analysis. Engagor does not currently offer DMARC monitoring or pre-send email auditing, which Postmastery provides. Teams that rely on these features would need to supplement Engagor or retain Postmastery for those specific use cases.
How does Engagor's anomaly detection compare to Postmastery's alerts?
Postmastery uses threshold-based alerts where users configure rules and receive notifications when metrics cross a set boundary. Engagor establishes baseline metrics for each sending stream and flags statistical deviations automatically, without requiring threshold configuration. This means Engagor can detect issues that fall outside predefined rules, such as gradual reputation degradation or unusual deferral patterns. Postmastery's approach gives users more direct control over what triggers an alert.
Does Postmastery support cloud ESPs?
Postmastery's primary focus is on-premise MTAs such as PowerMTA and Postfix, with partial cloud ESP support available through webhook integrations. Engagor provides native integrations with cloud ESPs including Klaviyo, Brevo, and Amazon SES, alongside on-premise MTA support. Teams sending through both cloud ESPs and on-prem MTAs may benefit from Engagor's unified platform. Teams running exclusively on-prem infrastructure may find Postmastery's specialization in that area sufficient.
Does Engagor support on-premise MTAs like PowerMTA and GreenArrow?
Yes. Engagor natively supports all major on-premise MTAs including PowerMTA, GreenArrow, Halon, Postfix, KumoMTA, and any MTA that produces standard SMTP logs. Engagor parses raw SMTP logs directly, extracting bounces, deferrals, opens, clicks, unsubscribes, and complaints for AI-powered analysis.
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