Stalwart
All-in-one mail and collaboration server
Stalwart is an all-in-one mail and collaboration server that handles email, calendars, contacts, and shared files. It includes built-in spam and phishing protection while supporting standard protocols like JMAP, IMAP, and SMTP.
| Best for | organizations seeking a unified secure platform |
| Website | stalw.art |
Company facts
| Headquarters | London, GB |
| Social profiles | X, GitHub |
| Brand colour | #121213 |
Facilities and features
- Published pricing
- API
- Integrations
What stands out
The product uses memory-safe Rust for enhanced security.
“Memory-safe Rust, encrypted-at-rest mailboxes, automatic TLS, and transport security verified end to end.”Stalwart, own website
The product offers a free Community edition under AGPL-3.0.
“a commercial Enterprise edition that adds operational features for larger and multi-tenant deployments.”Stalwart, own website
Strengths and trade-offs
- The product uses memory-safe Rust for enhanced security.
- The product offers a free Community edition under AGPL-3.0.
Appears in
Top rankings in Virtual office software
How Stalwart ranks
#5 in Enterprise virtual office software
How the score is made up: 20 for evidence on its own site; 18 for how complete its published information is; 40 for fit to this ranking's criteria; 16 for buying information on its own site.
“Modern mail and collaboration, in one server. Stalwart is a single product that covers the mail and collaboration protocols end to end (JMAP,”Stalwart, own website
“Stalwart Labs builds Stalwart, the open-source mail and collaboration server used by governments, universities, hosting providers, email service providers and enterprises of all sizes around the world.”Stalwart, own website
Alternatives to Stalwart
 AgilityPortalModern intranet & employee communication app | #1 in Enterprise virtual office software | 94.0 |
 HumHubOpen source intranet & community software | #2 in Enterprise virtual office software | 94.0 |
 MattermostSecure collaboration for technical teams | #3 in Enterprise virtual office software | 94.0 |
 Nextcloud | #4 in Enterprise virtual office software | 94.0 |
 SlackWhere work happens | #6 in Enterprise virtual office software | 92.0 |
 VirbelaA virtual world for work, education & events | #7 in Enterprise virtual office software | 88.0 |
Questions about Stalwart
Who is Stalwart best for?
Stalwart is best for organizations seeking a unified secure platform.
Where does Stalwart rank?
Stalwart is ranked #5 in Enterprise virtual office software (Lister Score 94.0).
What are the best alternatives to Stalwart?
The closest alternatives on Lister are AgilityPortal (#1 in Enterprise virtual office software), HumHub (#2 in Enterprise virtual office software) and Mattermost (#3 in Enterprise virtual office software).
Where is Stalwart based?
Stalwart is headquartered in London, GB.
Add this badge to your site
If you work at Stalwart, paste this code into your website to show where it ranks on Lister. The badge links to the ranking and updates within a day when the rank changes.
#5 in Enterprise virtual office software
Is this your company?
Claim Stalwart to suggest corrections to its listing (pricing, features, details) or ask about an enhanced profile. We review every claim before anything changes.