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Hyvor Relay vs Plunk

Learn how Hyvor Relay and Plunk 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 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
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Screenshot of Hyvor Relay
Favicon of Plunk

Plunk

Plunk unifies marketing, transactional, and broadcast emails into a single, complete solution for businesses of all sizes.
  • Stars


    4,979
  • Forks


    329
  • Last commit


    15 hours ago
  • Repository age


    2 years
  • License


    AGPL-3.0
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Screenshot of Plunk

Detailed Comparison

Both Hyvor Relay and Plunk 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.

Plunk wins
Community & Popularity

Plunk significantly outpaces Hyvor Relay in community adoption with 4,979 stars compared to 566 stars on GitHub. This 8.8x difference suggests Plunk has a much larger and more active community. In terms of developer contributions, Plunk has 329 forks, indicating moderate developer engagement.

Comparable
Development Activity

Both projects show recent activity, with Hyvor Relay last updated 8 days ago and Plunk 15 hours ago.

Comparable
Technology Stack

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

Comparable
Project Maturity

Both projects started around the same time, with Hyvor Relay beginning 11 months ago and Plunk 2 years ago.

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. However, they also have distinct specializations: Plunk extends into Customer Communication Platforms, Email Marketing & Newsletters.

Hyvor Relay wins
Hosting & Deployment

Hyvor Relay provides self-hosting options for complete data control and customization, while Plunk may be primarily cloud-based or require different deployment approaches.