GreenArrow Engine On-Premises
greenarrowemail.com · checked 21 Oct 2026
How it plugs in
—Public API
NoOpen source
NoFree tier
Signal on Email Server Software4.3#31 of 33

Pricing
- Standard Monthly LeaseMonthly Lease · 100k emails per hour$600/mo
- Standard PerpetualPerpetual · 100k emails per hour$6,000 one-time
- Pro Monthly LeaseMonthly Lease · 1M emails per hour$800/mo
- Pro PerpetualPerpetual · 1M emails per hour$9,000 one-time
- Enterprise Monthly LeaseMonthly Lease · Unlimited speed$1,250/mo
- Enterprise PerpetualPerpetual · Unlimited speed$15,000 one-time
As greenarrowemail.com lists them, checked 4 Oct 2026.
Near it
All alternatives →- EMEVO Mail Server#30 on this board
- MSMailbux Self-Hosted#32 on this board
- CPCommuniGate Pro#29 on this board
- MEMDaemon Email Server#33 on this board
- RRabiMail#28 on this board
- OOpenSMTPD#27 on this board
- SMStalwart Mail Server#26 on this board
- SMSynology MailPlus Server#25 on this board
- KKumoMTA#24 on this board
- WWhitemail#23 on this board