Home / Alternatives to Mailgun / Mailgun vs Haraka

Mailgun vs Haraka

A side-by-side look at Mailgun (the paid SaaS) and Haraka (the open source alternative). Use this page to decide if the switch fits your team and workflow.

Mailgun Haraka
Tagline Developer-focused transactional email and SMTP relay. High-performance Node.js SMTP server used by big senders.
License Proprietary SaaS MIT
Pricing Flex pay-as-you-go from $0.80/1000 emails; Foundation from $15/month. Free to self-host
Self-host option No Yes — difficulty 4/5
Hosted cloud available Yes (only option) No
Desktop apps Varies by product Web only
Mobile apps Official apps typically available None official
Ad slot — between tables

Best for

Scriptable SMTP on Node.js for teams that want a custom mail pipeline.

Haraka strengths

  • Plugin-based — you shape the flow in JavaScript.
  • Async core handles high connection counts.
  • Runs outbound relay and inbound MX workloads.

Haraka weaknesses

  • Not a batteries-included product — you build on top.
  • Documentation assumes SMTP fluency.
  • No baked-in UI for campaign management.

What's the catch with Mailgun?

  • Deliverability varies heavily by region and plan.
  • Validation and inbound parsing are separate paid add-ons.
  • Log retention is limited on lower tiers.

Still unsure?

Check the full list of alternatives to Mailgun: see Mailgun alternatives, or learn more about Haraka on its project page.

Other comparisons

Mailgun vs Postal

A batteries-included self-hosted replacement for the Mailgun SMTP relay.

Mailgun vs Mautic

When you need marketing automation on top of transactional sending.

Recommended reading

When self-hosting goes wrong: seven failure modes and how to avoid them

An honest retrospective on the ways self-hosted setups break — not in theory, but in practice — and the small habits that prevent most of them.

Will the open source project you depend on still exist in three years?

Bus factor, maintainer burnout, funding models, and the signals that separate OSS projects that survive from those that quietly decay.

From SaaS to self-hosted: a 30-day migration playbook

A week-by-week plan to move one service off SaaS and onto your own server without breaking your team's workflow.