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DoubleZero vs Hyvor Relay

Learn how DoubleZero and Hyvor Relay differ in their key features, development activity, technology stack and community adoption, so you can decide which of these email platforms is best for you.

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Favicon of DoubleZero

DoubleZero

00 is an open-source email API and infrastructure solution that allows developers to own and control their email stack.
  • Stars


    1,242
  • Forks


    66
  • Last commit


    1 year ago
  • Repository age


    2 years
  • License


    AGPL-3.0
  • Self-hosted


    Yes
View Repository

Warning: This project hasn't been updated in 1 year and might not be actively maintained anymore.

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Screenshot of DoubleZero
Favicon of Hyvor Relay

Hyvor Relay

Self-hosted email API alternative to AWS SES & Mailgun. Open-source AGPL-3.0 with enterprise features, automated deliverability, and cloud version coming 2026.
  • Stars


    566
  • Forks


    29
  • Last commit


    8 days ago
  • Repository age


    11 months
  • License


    AGPL-3.0
  • Self-hosted


    Yes
View Repository

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Screenshot of Hyvor Relay

Detailed Comparison

Both DoubleZero and Hyvor Relay have their unique strengths and serve similar purposes effectively. Consider your specific needs regarding popularity, activity, technology, maturity, licensing and features when making your decision.

DoubleZero wins
Community & Popularity

DoubleZero leads in popularity with 1,242 stars vs 566 stars for Hyvor Relay. The 119% higher star count indicates stronger community adoption. In terms of developer contributions, DoubleZero has 66 forks, indicating growing developer engagement.

Hyvor Relay wins
Development Activity

Hyvor Relay shows more recent development activity with its last commit 8 days ago, while DoubleZero was last updated 1 year ago. This suggests Hyvor Relay is being more actively maintained.

Comparable
Technology Stack

Both tools share common technology foundations, being built with JavaScript, CSS, Bash, Typescript. However, they differ in their additional technology choices: DoubleZero uses Elixir while Hyvor Relay leverages Golang, PHP, SvelteKit.

DoubleZero wins
Project Maturity

DoubleZero has been in development longer, starting 2 years ago, compared to Hyvor Relay which began 11 months ago. This 1.1-year head start suggests DoubleZero may have more mature features and established processes.

Comparable
Licensing

Both projects use the AGPL-3.0 license, providing identical terms for usage and distribution.

Comparable
Use Cases & Features

Both tools serve similar use cases in Email Platforms.

Comparable
Hosting & Deployment

Both DoubleZero and Hyvor Relay offer self-hosting capabilities, giving you full control over your data and infrastructure.