More features than the alternatives, for less.
Stalwart Enterprise gives you a complete mail and collaboration platform for a per-mailbox rate that drops as you grow. Every license includes unlimited domains, tenants, mailing lists and aliases at no extra cost, and the same license can be installed on an unlimited number of servers.
Unlimited, at no extra cost
- domains
- tenants
- mailing lists
- aliases
- servers
Each tier billed at its own rate.
The total bill for a given deployment combines the rates across the tiers it spans. A 600-mailbox deployment, for example, is charged the rate for 25-499 on the first 499 mailboxes and the rate for 500-999 on the remainder.
- Tier 1 Mailboxes: 25 to 499 EUR 2.00 per mailbox per year
- Tier 2 Mailboxes: 500 to 999 EUR 1.70 per mailbox per year
- Tier 3 Mailboxes: 1,000 to 4,999 EUR 1.45 per mailbox per year
- Tier 4 Mailboxes: 5,000 to 10,000 EUR 1.23 per mailbox per year
- Tier 5 Mailboxes: 10,000 to 49,999 EUR 1.04 per mailbox per year
- Tier 6 Mailboxes: 50,000 to 99,999 EUR 0.89 per mailbox per year
- Tiers 7 to 10 100,000 and beyond Obtain quote
Estimate your annual cost.
Drag the slider or type a mailbox count. The total uses the same tiered rates above. Premium Support is included at 150 mailboxes and above.
The smallest subscription is 25 mailboxes.
EUR 0.00
USD 0.00 around EUR 0.00 / month
Per-mailbox subscription, annual or monthly.
Two billing cycles are available: annual and monthly, for organisations that prefer a shorter commitment. Only user and group mailboxes count toward the total. Mailing lists and aliases are not billed. Every plan includes unlimited domains, tenants, mailing lists and aliases at no extra cost.
How a license is issued.
After purchase at the Stalwart Labs licensing portal, the key is available immediately and activates Enterprise features as soon as it is installed on the server. A 30-day Enterprise trial is available at the trial portal, with full access to Enterprise features for evaluation.
-
One key per customer. Your subscription has a single license key, which carries your mailbox count.
-
Anchored to a hostname domain, not to an individual server. The same key installs on an unlimited number of servers under that domain, such as every host under
*.example.org. -
Growing replaces the key, it does not add one. Buying more mailbox licenses raises the mailbox count of your key; install the updated key in place of the old one.
-
Unlimited client domains: the domain restriction applies only to server hostnames, not to the domains your users send and receive mail under.
-
Cancellation reverts to Community. Enterprise-only features are disabled, but no data is lost and service continues without interruption.
Premium Support is included from 150 mailboxes.
Enterprise subscriptions of 150 mailboxes or more include Premium Support: email support at support@stalw.art alongside the Priority Support area on the portal, an initial response within 48 hours during business hours, expedited bug fixing and influence on the product roadmap. Smaller Enterprise subscriptions (below 150 mailboxes) get the Enterprise feature set only; for help and questions, those customers rely on the same community support channels as Community-edition users. On-demand options for Premium Support customers include a dedicated Support Engineer, a custom SLA with tighter response targets, and lawful interception. The coverage comparison and the list of on-demand services live on the Support page.
Pricing FAQ.
-
Can I purchase fewer than 25 mailboxes?
Not at the moment: 25 mailboxes is the smallest Enterprise subscription. If your organisation has fewer users, a 25-mailbox license still covers you fully, leaves room to grow, and can be extended with more mailboxes at any time. If you do not need Enterprise features, the Community edition is free, with no mailbox limit.
-
Can I move the license to a different server?
Yes, as long as the server hostname falls under the licensed domain (for example, anywhere under
*.example.org). -
Do I need a separate license for each region or data centre?
No. One key covers every server under the licensed hostname domain, regardless of where it runs.
-
What happens if my mailbox count exceeds my plan mid-cycle?
Existing mailboxes keep working without restriction; the server simply stops creating new mailboxes once your licensed count is reached. To unblock new mailboxes, buy additional mailbox licenses at license.stalw.art: they raise the mailbox count of your existing key. Install the updated key in place of the old one on your server or cluster; keys do not stack. There is no downtime, and the system generates a prorated invoice for the remaining period.
-
Can I purchase additional mailboxes mid-cycle?
Yes. Buy more mailbox licenses at license.stalw.art at any time during your billing period. Your single license key is updated with the new mailbox count; install the updated key in place of the old one on your server or cluster. It takes effect without a restart, and the system charges only for the prorated remainder of the cycle.
-
Can I switch between monthly and annual billing?
Yes, in either direction. The change is applied at license.stalw.art and takes effect without downtime; the system reconciles the change with a prorated invoice for the rest of the period.
-
What happens if I cancel my Enterprise subscription?
The server reverts to the Community edition automatically. Enterprise-only features are disabled, but no data is lost and standard email and collaboration service continues without interruption.