How it plugs in
—Public API
NoOpen source
NoFree tier
Signal on Email Server Software4.8#28 of 33
Pricing
- StarterBilled monthly; minimum 1 mailbox · 1 mailbox minimum · 1 custom domain · 10 GB mailbox storage · 5,000 marketing sends per month · 1 Kanban board · 3 Kanban members₹199/mo
- BusinessBilled monthly; minimum 3 mailboxes · 3 mailboxes minimum · 50 GB mailbox storage · 50,000 webhook events per month₹299/mo
- EnterpriseSovereign hosting on your cloud · SSO (SAML, OIDC) and SCIM provisioning · Multi-tenant white-label · Custom SLA and dedicated customer success manager · Air-gapped deploymentsOn request
As rabimail.com lists them, checked 4 Oct 2026.
Near it
All alternatives →- OOpenSMTPD#27 on this board
- CPCommuniGate Pro#29 on this board
- SMStalwart Mail Server#26 on this board
- EMEVO Mail Server#30 on this board
- SMSynology MailPlus Server#25 on this board
- GEGreenArrow Engine On-Premises#31 on this board
- KKumoMTA#24 on this board
- MSMailbux Self-Hosted#32 on this board
- WWhitemail#23 on this board
- MEMDaemon Email Server#33 on this board