GreenArrow Engine
Email deliverability tools
Transactional email software
- Features
- Ease of use
- Ease of management
- Quality of support
- Affordability
- Market presence
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$250 per month
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What is GreenArrow Engine
GreenArrow Engine is a self-hosted email delivery platform used to send high-volume transactional and bulk email from an organization’s own infrastructure. It is typically used by email service providers, agencies, and enterprises that need direct control over sending IPs, throughput, and deliverability operations. The product focuses on SMTP-based sending, queue management, bounce and complaint processing, and reporting, rather than an all-in-one marketing automation suite. It is commonly deployed on dedicated servers or cloud instances and managed by technical teams.
Self-hosted infrastructure control
GreenArrow Engine runs on customer-managed servers, which allows direct control over IP reputation, sending domains, and network configuration. This model can fit organizations that need to meet internal security or data residency requirements. It also supports custom operational practices such as dedicated routing, segmentation by IP pools, and tailored retry policies. Compared with fully hosted platforms, it provides more control over the underlying sending environment.
High-volume SMTP sending focus
The platform is designed around SMTP injection and high-throughput delivery, which aligns with transactional and bulk sending use cases. It includes queue management and delivery controls that help operators tune performance and manage backoff behavior. It supports processing of bounces and feedback loops to maintain list hygiene and complaint handling. This operational emphasis can be advantageous for teams running large-scale sending programs.
Deliverability operations tooling
GreenArrow Engine includes features used in deliverability workflows, such as bounce categorization, suppression handling, and reporting on delivery outcomes. These capabilities help teams monitor sending health and respond to ISP-level signals. It is oriented toward operators who want to manage deliverability as an ongoing process rather than relying solely on a vendor-managed network. This can be useful for service providers managing multiple customers or brands.
Requires technical administration
Because it is self-hosted, teams must provision servers, configure DNS/authentication, and maintain the software and OS environment. Ongoing work typically includes monitoring, scaling, security patching, and log management. Organizations without dedicated email operations staff may find the operational overhead higher than with hosted transactional email services. Implementation timelines can be longer for non-technical teams.
Not a full marketing suite
GreenArrow Engine primarily addresses sending and deliverability operations rather than end-to-end marketing workflows. Capabilities commonly found in broader platforms—such as visual campaign builders, CRM-style contact management, and multi-channel automation—may require additional tools. Teams looking for integrated marketing features may need to pair it with separate applications. This can increase integration and data synchronization effort.
Deliverability depends on operator
With customer-owned infrastructure, deliverability outcomes depend heavily on list quality, authentication setup, warming practices, and ongoing reputation management. The product can provide controls and reporting, but it does not replace the need for disciplined sending practices. Teams new to high-volume email may experience a learning curve in managing ISP feedback and reputation. Hosted providers may offer more built-in network-level assistance for some users.
Plan & Pricing
Cloud Hosted Plans
| Plan | Price | Key features & notes |
|---|---|---|
| Cloud — 300k emails/month | $250 per month | Transactional & Marketing; SMTP & API sending; managed deliverability; dedicated IPs available; real-time stats; campaign sending; A/B testing; responsive editor; segmentation; triggered messages. Overage: $0.48 / 1,000. |
| Cloud — 1M emails/month | $450 per month | Same included features as above. Overage: $0.27 / 1,000. |
| Cloud — 2M emails/month | $600 per month | Same included features as above. Overage: $0.27 / 1,000. |
| Cloud — 4M emails/month | $1,000 per month | Same included features as above. Overage: $0.20 / 1,000. Plans for >4M/month available by custom quote. |
On-Premises (Engine only)
| Plan | Price | Key features & notes |
|---|---|---|
| Standard (Engine on-prem) | $600 per month (monthly lease) / $6,000 perpetual | Throughput: 100k/hour. Includes delivery charts, delivery rate limiting & automatic backoff, click & open tracking, flexible routing, bounce & FBL processing, webhooks, multiple IP support, real-time stats. |
| Pro (Engine on-prem) | $800 per month (monthly lease) / $9,000 perpetual | Throughput: 1M/hour. Includes features as Standard plus higher throughput. |
| Enterprise (Engine on-prem) | $1,000 per month (monthly lease) / $12,000 perpetual | Throughput: Unlimited speed. Enterprise entitlements and highest throughput. |
On-Premises (Engine + Marketing Studio)
| Plan | Price | Key features & notes |
|---|---|---|
| Standard (Engine + Marketing Studio) | $750 per month (monthly lease) / $9,000 perpetual | Throughput: 100k/hour. Includes responsive editor, segmentation, A/B testing, triggered messages. Limitations: No Remote Lists, No Special Sending Rules, No Multiple Organizations; White labeling included. |
| Pro (Engine + Marketing Studio) | $1,100 per month (monthly lease) / $14,000 perpetual | Throughput: 1M/hour. Includes Special Sending Rules, Multiple Organizations, White Labeling; No Remote Lists. |
| Enterprise (Engine + Marketing Studio) | $1,500 per month (monthly lease) / $18,000 perpetual | Throughput: Unlimited speed. Includes Remote Lists, Special Sending Rules, Multiple Organizations, White Labeling. |
Optional add-ons & services (official docs)
- Server Management (add-on for non-hosted customers): $350 per month per license (system administration, monitoring, monthly operational review).
- Managed Backups (On-Prem customers): $100 per month per server (up to 200GB).
- Backup restoration: $200/hr (3-hr minimum) during normal business hours; $250/hr (3-hr minimum) outside normal business hours.
- Other add-ons listed on site: Launch Assist, GreenArrow Inbox Monitor, High Availability Cluster (contact sales for details/pricing).
