EmailEngine vs MailKite Server
EmailEngine
emailengine.app
MailKite Server
mailkite.devSide by side
| Figure | EmailEngine | MailKite Server |
|---|---|---|
| Price from | $120.83/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 1 |
| Spec score · Email APIs | 8.6 (#4) | 8.4 (#8) |
| Headquarters | Tallinn, Estonia | Sheridan, Wyoming, USA |
| Maker | EmailEngine is made by Postal Systems OÜ, an Estonian company based in Tallinn; its about page identifies Andris Reinman as the founder and developer. | The site identifies SendHub LLC, doing business as MailKite, and gives its address as 30 N Gould St #59709, Sheridan, WY 82801, USA. |
| Notable limits | It does not support POP3, ActiveSync or Exchange Web Services, and it does not keep a sent-mail archive or webhook delivery history. | The self-hosted API does not yet claim full Cloud API parity; templates, scheduling, attachments, and tracking are listed as hosted-only features. |
| Security | Stored mailbox credentials and OAuth2 tokens can be encrypted with AES-256-GCM when the deployment’s EENGINE_SECRET key is configured. | Server components use HMAC-authenticated HTTP endpoints, and inbound webhook deliveries are signed and retried. |
| Support | The maker says support goes directly to the developer who wrote the code, and its annual subscription includes developer support. | The self-hosted server page directs users to GitHub discussions and setup documentation; it describes human support as a MailKite Cloud offering. |
Plans
EmailEngine
- Annual subscription$1,450 a year
- Enterprise perpetual licencePriced on request
In their own words
EmailEngine
EmailEngine is a self-hosted email API that connects Gmail, Microsoft 365, and IMAP mailboxes through a unified REST API. It sends webhooks when mailbox messages or state change, and can send mail through the connected account’s SMTP server or provider API. Native integrations use the Gmail API and Microsoft Graph; authentication options include managed OAuth2, service accounts for Google Workspace, Microsoft 365 app-only access, and shared or delegated mailboxes. An optional MCP server, currently in beta, lets connected AI clients search, read, file, draft, and send email with approved access. The admin interface shows sync status and queue details, with a Prometheus endpoint and Grafana dashboard for operations. EmailEngine runs on the customer’s infrastructure, uses Redis for sync metadata, and fetches message bodies on demand rather than storing them. A server and Redis using the noeviction policy are required. The annual subscription is $1,450 a year, excluding VAT where applicable, and includes developer support; each installation can start a full-functionality 14-day trial without signup or a credit card.
MailKite Server
MailKite Server has no write-up on Specifiction yet; its figures are above.