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Relay Alternatives
Similar projects and alternatives to relay
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LearnOpenGL
Code repository of all OpenGL chapters from the book and its accompanying website https://learnopengl.com
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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Kavita
Kavita is a fast, feature rich, cross platform reading server. Built with the goal of being a full solution for all your reading needs. Setup your own server and share your reading collection with your friends and family.
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docker-mailserver
Production-ready fullstack but simple mail server (SMTP, IMAP, LDAP, Antispam, Antivirus, etc.) running inside a container.
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carimbo
A 2D game engine developed in modern C++ using SDL, an Entity-Component-System (ECS) architecture, miniaudio, and Box2D. It features Lua scripting and is designed for web portability via WebAssembly
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slack
Bring your code to the conversations you care about with GitHub's integration for Slack (by integrations)
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NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better relay alternative or higher similarity.
relay discussion
relay reviews and mentions
Posts with mentions or reviews of relay.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2025-12-01.
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Show HN: Hyvor Post (privacy-first newsletters) & Relay (self-hosted email API)
Hello HN,
We (HYVOR) are excited to launch two new products today:
Hyvor Post (https://post.hyvor.com): a simple, privacy-first newsletter platform with zero tracking.
Hyvor Relay (https://github.com/hyvor/relay): a self-hosted email delivery service. An alternative to services like AWS SES or Mailgun.
We've been working on these two projects for almost a year, and we are super excited to finally release them.
Our release announcement has more insights: https://hyvor.com/blog/hyvor-post-relay. In short, we first added newsletter features to Hyvor Talk (our commenting system), and it proved to make things complicated. So, we started working on Hyvor Post as a standalone newsletter platform. Then, we could not find an SMTP provider that does not include tracking features and has reasonable pricing - so we built our own: Hyvor Relay.
Both products are open-source under AGPLv3. Hyvor Post is cloud-only at the moment. Hyvor Relay is self-hosted only. Compared to traditional solutions like Postfix, Hyvor Relay makes it very hard to make mistakes when sending emails by having built-in health checks for DKIM, SPF, PTR, a DNS server to automate records, etc. Building Hyvor Relay was a significant undertaking for our small team, and we are very happy that we now have a reasonably stable version. We are also working to release a public cloud version in 2026 to help developers reduce email sending costs significantly.
Our team is around on HN - feel free to ask any questions!
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Introducing Hyvor Post & Hyvor Relay
Hyvor Relay can currently be self-hosted, while our cloud version is in private beta, with a public release planned for 2026. Visit the website for more details or view source code on Github.
- I made a down detector for down detector
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Cloudflare Email Service: private beta
We are working on an open-source, self-hosted solution [0] to make this easier. When you correctly set up DKIM, SPF, reverse/forward DNS for IPs, it is not much hard to get emails delivered. IPs can still get blacklisted and you need to monitor blacklists and contact them if it happens. Solutions like Postfix are great, but they lack observability. In our solution, we have developed dashboards and health checks to make it easier to find problems with the set up.
We are currently running beta tests (really appreciate it if you can join).
[0] https://github.com/hyvor/relay
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Ask HN: What Are You Working On? (July 2025)
For the past two months, I have been working on Hyvor Relay [1], an open-source, self-hosted alternative to AWS SES, Mailgun. It's been an awesome ride learning SMTP and DNS in depth. And, we're pretty close to a beta release.
[1] https://github.com/hyvor/relay
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A note from our sponsor - SaaSHub
www.saashub.com | 14 Jun 2026
Stats
Basic relay repo stats
5
624
9.3
4 days ago
hyvor/relay is an open source project licensed under GNU Affero General Public License v3.0 which is an OSI approved license.
The primary programming language of relay is PHP.
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