EmailSuccess vs Hyvor Relay
EmailSuccess
emailsuccess.com
Hyvor Relay
relay.hyvor.comSide by side
| Figure | EmailSuccess | Hyvor Relay |
|---|---|---|
| Price from | €333.33/mo | €30/mo |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 4 | 3 |
| Spec score · Transactional Email Software | 9.4 (#1) | 8.7 (#6) |
| Spec score · Transactional email services | 9.1 (#4) | 8.5 (#14) |
| Authentication | The product supports DKIM signing, SPF monitoring, DMARC compliance and TLS encryption controls. | Relay requires OpenID Connect (OIDC) for authentication and does not include its own login or signup system. |
| Free plan | Yes | Yes |
| Headquarters | The listed headquarters are in Faenza, Ravenna, Italy, with offices also reported in Milan, Bologna and Paris. | Paris, France |
| Integrations | Listed technology integrations include Splunk, Elastic, Kafka, Pravega, HerdDB, Rspamd, Ongage, BlackBox and MySQL. | The self-hosting guide lists built-in Prometheus, Grafana, and Alertmanager integrations for monitoring and observability. |
| Product | EmailSuccess is an on-premises high-performance mail transfer agent for enterprise email gateways and high-volume SMTP servers. | Hyvor Relay is an open-source, self-hostable email API designed for developers. |
Plans
Hyvor Relay
- Enterprise License€10,000 a year
- Cloud Standard€30 a month
- Self-Hosted Open-SourceFree
In their own words
EmailSuccess
EmailSuccess is an on-premises mail transfer agent for enterprise email gateways and high-volume SMTP servers. It manages outbound delivery, sending reputation, and changing authentication requirements. Its deliverability engine analyzes ISP responses and adjusts delivery settings in real time. Flexible queues, multiple IP pools, and connection pooling support high-volume sending and traffic prioritization. Authentication features include DKIM signing, DMARC compliance, and SPF and SenderID monitoring; TLS delivery encryption can be governed by configurable rules. The product classifies and reports bounces and feedback loops, and can forward ISP spam complaints to another system. Sending and message analysis are supported through SMTP, input scripting and filtering, and REST and SOAP APIs. Management tools include VirtualMTA traffic segmentation, an SSH console, and a web interface for monitoring and message history. The Free plan costs nothing, billed annually, and lists 100,000 emails per day and two active IPs.
Hyvor Relay
Hyvor Relay has no write-up on Specifiction yet; its figures are above.