GreenArrow vs Sendy (2026): which should you pick?

Pick GreenArrow if

• Fits if you send hundreds of thousands of emails a month
• Works for email service providers and consultants who want their own sending engine

Look elsewhere if

• Pricey if you are small: Cloud starts at 300,000 emails for $250 a month
• Not for you if you want a free plan, as none is shown
• Skip it if you want the campaign editor on-premises without paying more, as Marketing Studio is a higher-priced edition
• Watch out: launch help, backups, Inbox Monitor and clustering are add-ons priced on request

Pick Sendy if

• Fits if you publish to a list of tens of thousands and want to stop paying per subscriber
• Works for agencies that run a PHP host and want to give each client a branded account with its own limits

Look elsewhere if

• Skip it if the words PHP, MySQL and Amazon SES make you nervous, as you set them up
• Not for you if you want to try it first, as there's no trial, only a refund
• Tight if you run several sites, since each license covers one domain
• Watch out: major version upgrades aren't included, and the AI add-on is $39 and installation $79
• Too light for anyone wanting a phone app or a hosted service, as it runs only on your own server

GreenArrow

• Cloud plans start at 300,000 emails a month; the pages show no small-sender or free plan, and volumes above 4 million are quoted individually.
• The on-premises Engine alone has no campaign editor; Marketing Studio is a separate, higher-priced on-premises edition.
• Launch assistance, server management and backups, Inbox Monitor and high-availability clustering are optional add-ons priced on request.

Sendy

• You host it yourself on a PHP and MySQL server and need your own Amazon SES account.
• Each license covers one domain, and major version upgrades are not included.
• The AI Assistant is a $39 one-time add-on (shown cut from $49), and installation by Sendy costs $79.
• There is no free trial; Sendy offers a refund if it does not work out.

GreenArrow

SMTP and API sending

Mail can be injected through SMTP or an HTTP API, with click and open tracking, bounce and feedback-loop processing, and event webhooks built in.

Delivery controls

Rate limiting, automatic backoff when receivers defer, multiple IP support and flexible routing, shown on delivery charts.

Marketing Studio

A responsive editor, segmentation builder, A/B tests (up to ten on one campaign) and triggered messages, with 39 data points reported per campaign.

Cloud or on-premises

The vendor says the same engine and interfaces run in both editions, so a customer can move between its managed cloud and its own servers.

Clustering

On-premises Engine supports cluster-wide throttling and auto-scaling, with a Kubernetes reference architecture and Prometheus metrics.

Sendy

Sending through Amazon SES

Campaigns go out through your own Amazon SES account at Amazon's rate; SendGrid, Mailjet and Elastic Email also work natively over SMTP.

Three email editors

Switch between drag-and-drop, WYSIWYG and HTML editors when building templates.

Autoresponders, rules and webhooks

Drip sequences sent at set intervals or on dates, plus rules that send notifications, fire webhooks or move subscribers when something happens.

Segments and custom fields

Build segments from any conditions, store custom fields for personalization, and include or exclude lists and segments per campaign.

White-labeled client brands

Group lists into brands and give clients their own access, permissions, sending limits and pricing.

Live reports and list cleaning

Real-time opens, clicks, bounces, complaints and locations, with bounces and complaints removed automatically.

GreenArrow

• Cloud 300k$250

  per month for 300,000 emails

  Managed cloud sending for transactional and marketing mail, with Marketing Studio included. Overage is $0.48 per thousand emails.

• Cloud 1M$450

  per month for 1,000,000 emails

  Same cloud features at a higher volume. Overage is $0.27 per thousand emails.

• Cloud 2M$600

  per month for 2,000,000 emails

  Same cloud features at a higher volume. Overage is $0.27 per thousand emails.

• Cloud 4M$1,000

  per month for 4,000,000 emails

  Same cloud features at a higher volume. Overage is $0.20 per thousand emails. Higher volumes are quoted individually.

• Engine On-Premises Standard$600

  per month, monthly lease

  Engine on your own servers at up to 100,000 messages an hour; perpetual license $6,000. Pro (1M an hour) leases at $800, Enterprise (unlimited speed) at $1,250.

• Engine + Studio On-Premises Standard$750

  per month, monthly lease

  Engine plus Marketing Studio at up to 100,000 an hour; perpetual $9,000. Pro leases at $1,100 and Enterprise at $1,500 a month.

Sendy

• Sendy software$69

  one-time purchase, for one domain

  The self-hosted app for one domain, with free updates until the next major version. Sending through Amazon SES costs $1.6 per 10,000 emails, paid to Amazon.