SmarterMail vs Stalwart Mail Server
SmarterMail
smartertools.com
Stalwart Mail Server
stalwart.emailSide by side
| Figure | SmarterMail | Stalwart Mail Server |
|---|---|---|
| Price from | $41.67/mo | $0.09/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 5 | 16 |
| Spec score · Email Server Software | 8.0 (#11) | 8.0 (#12) |
| Spec score · Mail Server Software | 8.0 (#14) | 8.0 (#15) |
| Deployment | SmarterMail is available for Linux and Windows and has a Docker version; the download page lists supported Linux distributions and Windows Server 2016, 2019, 2022, and 2025+. | Stalwart can run as one node or as a cluster across regions, and its site describes it as designed to scale to millions of mailboxes. |
| Integrations | The Marketplace lists Dropbox, Google Drive, OneDrive, ownCloud, LeitzCloud, Rocket.Chat, ChatGPT, Collabora Online, and OnlyOffice integrations. | Listed integrations include LDAP, Active Directory, OIDC, SQL directories, RocksDB, FoundationDB, PostgreSQL, MySQL, SQLite, S3-compatible storage, Azure Blob, and search engines including Meilisearch, Elasticsearch, and OpenSearch. |
| Product | SmarterMail is an email, groupware, and collaboration server positioned as an alternative to Microsoft Exchange. | Stalwart is an open-source mail and collaboration server for email, calendars, contacts, and shared files. |
| Security | The product includes spam filtering and enterprise-level antivirus, with Message Sniffer available as an integration. | The product page lists mailbox encryption at rest with S/MIME or OpenPGP, DANE, MTA-STS, automatic ACME TLS, DKIM key rotation, access controls, rate limiting, and automatic IP banning. |
Plans
SmarterMail
- SmarterMail FreeFree
- SmarterMail High Availability — Hub$150 a month
- SmarterMail High Availability — Node$250 a month
- SmarterMail Professional (50 mailboxes)$500 a year
- SmarterMail Enterprise (50 mailboxes)$700 a year
Stalwart Mail Server
- CommunityFree
- Enterprise: 25–499 mailboxes$2.40 a year
- Enterprise: 500–999 mailboxes$2.04 a year
- Enterprise: 1,000–4,999 mailboxes$1.74 a year
- Enterprise: 5,000–10,000 mailboxes$1.48 a year
- Enterprise: 10,000–49,999 mailboxes$1.25 a year
- Enterprise: 50,000–99,999 mailboxes$1.09 a year
- Enterprise: 100,000+ mailboxesPriced on request
- Community EditionFree
- Enterprise — 50,000 to 99,999 mailboxes$1.09 a year
In their own words
SmarterMail
SmarterMail has no write-up on Specifiction yet; its figures are above.
Stalwart Mail Server
Stalwart Mail Server has no write-up on Specifiction yet; its figures are above.