GreenArrow Engine On-Premises review
A self-hosted delivery engine with tiered sending speeds and real-time statistics.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
GreenArrow Engine On-Premises is a self-hosted email delivery engine for organizations sending high volumes through their own servers. It combines SMTP message injection and inbound SMTP with a RESTful HTTP injection API, flexible routing, and POP3 access to local Maildir mailboxes. Delivery controls include rate limiting and automatic backoff, while bounce and feedback-loop processing help manage responses to campaigns. Real-time delivery statistics and click and open tracking make it relevant to teams that need visibility into sending performance. It is a fit for senders seeking control over delivery infrastructure, rather than organizations primarily looking for hosted employee inboxes.
The Engine-only plans are divided by lease or perpetual licensing. Standard costs $600 per month or $6,000 one time and specifies 100k emails per hour. Pro costs $800 per month or $9,000 one time, with 1M emails per hour. Enterprise costs $1,250 per month or $15,000 one time and specifies unlimited speed. Each plan is the on-premises Engine edition; the listed speed level is the stated difference. This structure makes the choice hinge on sending volume and preference for recurring or one-time payment. The entry price and absence of a free plan make it a substantial commitment for smaller or occasional senders.
Its feature set spans outbound delivery and selected inbound-mail functions, including SMTP receipt, bounce handling, and POP3 access to local mailboxes. That breadth supports delivery workflows, but does not make Engine a general-purpose mail hosting service. Deployment is self-hosted, and the listed support channel is documentation, so teams should be prepared to operate their own environment and use the documentation for guidance. Choose GreenArrow Engine when on-premises sending controls and analytics are central requirements; consider a mailbox-focused service if staff inbox hosting is the main need.
GreenArrow Engine On-Premises pros and cons
- Where it wins
- Supports SMTP and HTTP message injection, plus inbound SMTP service
- Processes bounces and feedback loops with rate limiting and automatic backoff
- Offers real-time delivery statistics, click tracking, and open tracking
- Where it doesn't
- Engine plans start at $600 per month
- Requires self-hosted deployment
- Designed for delivery, not general-purpose end-user mail hosting
GreenArrow Engine On-Premises fact sheet, pricing and score →
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