Our verdict
We have not reviewed Haraka yet
No one at Enterprise DNA has checked this listing against its sources. The description comes from public listings gathered automatically. Any fact below shows where it came from and when it was last checked.
From the listing
About Haraka
Haraka is a fast, highly extensible, and event-driven SMTP server written in JavaScript. It processes email through a plugin architecture, allowing developers to customize message handling and delivery.
Best for
Developers needing a programmable, high-performance SMTP server in JavaScript.
Use cases
- Building a custom mail server with tailored filtering and routing
- Creating high-throughput email processing pipelines
- Implementing custom SMTP hooks for authentication or content inspection
Notes
5,627 stars on GitHub. Last updated 2026-10-17. Licensed MIT.
Pros
- High performance due to event-driven design
- Extensible via plugins, enabling deep customization
- Active open-source project with a substantial community
Cons
- Requires JavaScript knowledge for plugin development
- Smaller ecosystem compared to more mainstream mail servers
- May have a steeper learning curve for SMTP protocol newcomers
Key facts
What we have checked
- Latest version
- 3.4.0 (released 5 Nov 2026)
- Days since the last commit
- 0
- GitHub forks
- 721
- GitHub stars
- 5,633
- Days to a first reply on issues
- 1
- Open issues
- 0
- Releases in the last 90 days
- 3
Each value shows when we last confirmed it and where it came from. Values we have not confirmed are left out, never guessed.
Stars and usage
How Haraka is growing
5,629 to 5,633
Health and security
Is Haraka looked after, and what do its setup files show
Health score
100 out of 100
| Part | Points | What we saw |
|---|---|---|
| Recent activity | 30 of 30 | Last push 0 days ago |
| Releases | 15 of 15 | 3 releases in 90 days |
| Issue replies | 20 of 20 | First reply in 1 days (median) |
| Maintainer | 15 of 15 | Owned by an organisation |
| Official source | Not counted | MCP servers only |
Alternatives
Alternatives to Haraka
| Record | Type | How we know | Checked |
|---|---|---|---|
| MailgunThis is an alternative to it | Product | Linked recordGitHub | |
| PostmarkThis is an alternative to it | Product | Linked recordGitHub |
Compare
Compare Haraka side by side
Sources
Where this comes from
A source shows what was published when we checked it. It does not certify security, performance or a working installation. Read our method.
Changelog
What changed
Released 3.4.0
Released 3.3.5
Released 3.3.4
Released 3.3.3
Released 3.3.2
Released 3.3.1
Released 3.2.1
Released 3.2.0
Released 3.1.7
Released 3.1.6
Released 3.1.5
Open-source & AI alternatives
Swap-in tools that solve the same job. Weigh the trade-offs before you commit.
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