Haraka
A scalable, modular SMTP server designed for high-throughput message delivery
- Also known as
- haraka
What is Haraka?
A free, open-source SMTP server written in Node.js that efficiently handles thousands of concurrent email connections and allows developers to extend functionality through a modular plugin system written in JavaScript.
Haraka pricing
We don't have Haraka's full plan breakdown yet (its pricing page resisted automated reading). Here's what we could confirm. Always check live pricing for exact numbers.
What Haraka does
The capabilities that matter for email delivery infrastructure, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment model
- Self host
- Rest API sending
- -
- Smtp relay
- ✓
- Inbound email parsing
- ✓
- Dedicated ip available
- -
- Bounce complaint handling
- -
- Open click tracking
- -
- Marketing template builder
- -
- Webhook event streaming
- -
- HIPAA compliant
- -
- SOC2 type ii
- -
- ISO 27001
- -
- Pricing model
- -
Platform & deployment
Independently observed- Linux
- Self-hosted
Security & compliance
Known vulnerabilities: 2 (1 in the last 12 months), max severity CRITICAL sourcea count reflects scale & disclosure, not quality
Haraka FAQ
Common questions about Haraka, answered from independent, dated evidence.
What is Haraka?
A free, open-source SMTP server written in Node.js that efficiently handles thousands of concurrent email connections and allows developers to extend functionality through a modular plugin system written in JavaScript. It is indexed under Email Delivery Infrastructure.
Source: https://haraka.github.io
Is Haraka free to use?
Haraka is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. Pricing changes often, so verify at source before relying on it.
Source: https://haraka.github.io
What platforms does Haraka support?
Haraka supports a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.
Source: https://haraka.github.io
Can Haraka be self-hosted?
Yes. Haraka can be deployed on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://haraka.github.io
Is Haraka open source?
Yes. Haraka is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.
Source: https://github.com/haraka/Haraka
Haraka alternatives
Other email delivery infrastructure we track, ranked by the same independent score.
- Twilio SendGridUsage-based voice calling and communication platformlow · 20%
- MailjetEmail sending and marketing platform designed for developersmedium · 63%
- MailtrapTransactional email delivery and testing platform for development teamshigh · 75%
- SparkPostPay-as-you-grow platform for sending emails, SMS, and WhatsApp messageslow · 22%
- LoopsEmail platform for SaaS teams to manage marketing, transactional, and lifecycle campaignslow · 40%
- PostalAI-powered coding assistant that provides suggestions and guidance throughout software development workflowslow · 14%
Compare Haraka
Side by side against other email delivery infrastructure, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for Haraka, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Release cadence | 79 | 0.05 | 4.1 | ✓ |
| Capabilities | 46 | 0.06 | 2.9 | ✓ |
| Development activity | 30 | 0.09 | 2.8 | ✓ |
| Security score | 67 | 0.04 | 2.8 | ✓ |
| Stars | 71 | 0.03 | 1.8 | ✓ |
| Dependent projects | 23 | 0.06 | 1.4 | ✓ |
| Integrations | 0 | 0.07 | 0.0 | - |
| Security posture | 0 | 0.12 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 8 | mediumsource · 2026-10-13 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 5 items | mediumsource · 2026-09-10 · 67% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Smtp relay: Yes · Deployment model: self_host · Inbound email parsing: Yes | mediumsource · 2026-10-13 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | JavaScript | highsource · 2026-10-13 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | MIT | highsource · 2026-10-13 · 95% |
Pricing
Release
Security
Is Haraka the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank Haraka against the rest of the email delivery infrastructure we index, using the same dated evidence weighted your way.
Free to run, no account needed to start. How the evaluation works
Is this your product?
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