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Haraka vs Hyvor Relay

The same facts for both, read from GitHub every night, and the relation a person reviewed.

HarakaHyvor Relay
LanguageJavaScriptPHP
LicenceMITAGPL-3.0
Stars5.6k911
Latestv3.3.40.0.46
Last push2026-10-032026-09-30
Release cadenceabout 25 days between releasesabout 26 days between releases
Active contributors3 commit authors on the default branch in the last 90 days4 commit authors on the default branch in the last 90 days
Flagsnonenone

How they relate

  • Both replace SendGrid. Alternatives to SendGrid →

    PartialHarakaA plugin-based SMTP server in Node.js for high-volume inbound and outbound mail, without an HTTP API or tracking dashboard.

    PartialHyvor RelayTransactional sending over an HTTP API and SMTP with bounce handling and webhooks; no marketing campaigns.