Hyvor Relay Open-Source Self-Hosted Email API

Explore this developer service’s ongoing no-cost allowance, restrictions and official documentation before deploying.

INCLUDED FREE ALLOWANCE

AGPL-3.0 open-source email API and SMTP delivery software may be self-hosted without a software subscription or per-message software quota; operator supplies mail servers and delivery infrastructure.

View official documentation

Plan details

What do these plan and deployment labels mean?

Plan: Ongoing free allowance
Deployment model: Self-hosted
Credit card: Not required
Commercial use: Allowed
Added to directory (UTC): 2026-11-04
Last checked: 2026-11-04

Important restrictions

Self-hosting requires PostgreSQL, workers, SMTP infrastructure, IP reputation, DNS and operational maintenance; provider-hosted Relay Cloud is separate and not included. Modified network-served versions must comply with AGPL-3.0; enterprise commercial licenses are separately paid.

View official documentation

Independent community listing, not affiliated with the provider. Always check the latest billing policy and quotas before enabling paid usage.