Open-source alternative
for MailerLite
MailerLite is developer-friendly. Plunk is developer-FIRST. Open-source, self-hostable, with API-first design and pay-as-you-go pricing instead of subscriber tiers.
Open Source Meets Developer Experience
Pay for emails sent, not subscribers stored
Pay per email sent
Pay-as-you-go pricing. Open-source and self-hostable for full control.
Pay per subscriber count
Monthly subscription based on total subscribers. Proprietary cloud-only platform.
The Truly Developer-First Alternative
Open Source
AGPL-3.0 licensed. Inspect the code, contribute features, understand exactly how your platform works. MailerLite is proprietary.
API-First Design
Built for developers from day one. Modern REST API with comprehensive documentation. Integrate email into your product seamlessly.
Pay per Email
Only pay for emails sent, not subscribers stored. Grow your contact list without worrying about tier upgrades or price increases.
Self-Hostable
Deploy on your infrastructure with Docker. Full data ownership, compliance control, no vendor lock-in. MailerLite is cloud-only.
Fast Setup
Start sending in 5 minutes. Simple authentication, clean API endpoints, comprehensive docs. No visual builder learning curve.
Unlimited Contacts
Store unlimited contacts without additional cost. Your database grows freely, pricing stays predictable based on emails sent.
Feature Comparison
Frequently asked questions
What is the main difference between Plunk and MailerLite?
The main difference is that Plunk is open-source and self-hostable, while MailerLite is proprietary SaaS. Plunk uses pay-per-email pricing versus MailerLite's pay-per-subscriber model. Both are developer-friendly, but Plunk is API-first with full code transparency, while MailerLite focuses more on visual email builders with good API support.
Is Plunk more expensive than MailerLite?
It depends on your usage pattern. MailerLite charges based on subscriber count (e.g., $10/month for 1,000 subscribers), while Plunk charges per email sent. If you have a large subscriber list but send infrequently, Plunk is typically cheaper. If you email your entire list frequently, costs are similar. The key difference is predictability: Plunk only charges for actual usage.
Can I self-host Plunk unlike MailerLite?
Yes. Plunk is open-source (AGPL-3.0) and can be self-hosted using Docker. This gives you full control over your data, infrastructure costs, and compliance requirements. MailerLite is cloud-only with no self-hosting option. Self-hosting is ideal for privacy-sensitive use cases or cost optimization at scale.
Does Plunk have a drag-and-drop builder like MailerLite?
Plunk has a basic email editor, but most users manage templates using HTML/code for full control, version control, and reusability. MailerLite excels at visual drag-and-drop building for non-technical users. If you're a developer who prefers code-based templates, Plunk is better. If you need rich visual builders for marketers, MailerLite is better.
How does Plunk's API compare to MailerLite?
Both have modern REST APIs, but Plunk's API is designed with developers as the primary user. Plunk prioritizes API-first workflows, making it easier to integrate email into your application. MailerLite has a good API but is built UI-first with API as secondary. For programmatic email sending and automation, Plunk offers a superior developer experience.
Experience true developer-first email
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