Hyvor Relay vs MailKite Server
Hyvor Relay
relay.hyvor.com
MailKite Server
mailkite.devSide by side
| Figure | Hyvor Relay | MailKite Server |
|---|---|---|
| Price from | €30/mo | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 1 |
| Spec score · Email APIs | 8.6 (#5) | 8.4 (#8) |
| Deployment | Self-hosting requires PostgreSQL and uses Docker Compose or Docker Swarm; the guide describes single-server and multi-server deployments. | The project says it runs on Node.js 22.5 or later and documents Docker Compose, VPS, Fly.io, and Railway deployments. |
| Headquarters | Paris, France | Sheridan, Wyoming, USA |
| Integrations | The self-hosting guide lists built-in Prometheus, Grafana, and Alertmanager integrations for monitoring and observability. | MailKite lists official SDKs for Node.js, Python, Ruby, Go, PHP, Java, C#, and Rust, plus a CLI, an MCP server, and SMTP relay integrations. |
| License | The self-hosted product is licensed under AGPL-3.0, and enterprise licensing changes the terms and support options while retaining the same features. | The server components are licensed under AGPL-3.0. |
| Security | The hosting documentation says its HTTP server has built-in application-layer rate limiting and recommends cloud-provider DDoS protection for network-layer attacks. | Server components use HMAC-authenticated HTTP endpoints, and inbound webhook deliveries are signed and retried. |
Plans
Hyvor Relay
- Enterprise License€10,000 a year
- Cloud Standard€30 a month
- Self-Hosted Open-SourceFree
In their own words
Hyvor Relay
Hyvor Relay has no write-up on Specifiction yet; its figures are above.
MailKite Server
MailKite Server has no write-up on Specifiction yet; its figures are above.