Open-source alternative
for ConvertKit
ConvertKit is built for creators. Plunk is built for developers who need powerful email automation without the creator-focused bloat. Same automation, better DX, pay-as-you-go.
Pay for Emails, Not Subscribers
Pricing that grows with usage, not list size
Pay per email sent
Pay-as-you-go pricing. Only pay for emails you send, not for subscribers you store.
Pay per subscriber count
Monthly subscription based on total subscribers, whether you email them or not.
Built for Developers, Not Creators
Developer-First API
Modern REST API designed for developers. No visual builder complexity, just clean endpoints for sending emails and managing workflows.
Pay-as-you-go Pricing
Only pay for emails sent, not subscribers stored. Grow your list without worrying about tier upgrades or subscription increases.
Open Source
AGPL-3.0 licensed. Inspect the code, contribute features, understand exactly how your emails are sent. ConvertKit is proprietary.
Self-Hostable
Run on your own infrastructure with Docker. Full data control, compliance-ready, cost-optimized for scale. ConvertKit is cloud-only.
5-Minute Setup
Start sending emails in minutes. No form builders to configure, no landing pages to design. Just authenticate and send.
Unlimited Contacts
Store unlimited contacts without penalty. No subscriber tiers, no forced upgrades. Your contact database grows freely.
Feature Comparison
Frequently asked questions
When should I choose ConvertKit over Plunk?
Choose ConvertKit if you're a creator who needs landing pages, product selling, and a creator-focused interface designed for non-technical users. ConvertKit excels at helping course creators, bloggers, and podcasters monetize their audience. Choose Plunk if you're a developer who values API-first design, needs transactional + marketing emails in one platform, and prefers code over visual builders.
What is the pricing difference between Plunk and ConvertKit?
ConvertKit charges based on subscriber count. Your cost increases as your list grows, regardless of how many emails you send. Plunk uses pay-as-you-go pricing where you only pay for emails actually sent. This means with ConvertKit, a list of 10,000 subscribers costs $119/month even if you rarely email them. With Plunk, you only pay when you send.
Can Plunk handle creator workflows like ConvertKit?
Yes, Plunk supports email automation, workflows, and segmentation similar to ConvertKit. You can create automated sequences, trigger emails based on events, and segment your audience. The main difference is Plunk doesn't include landing page builders or product selling features. It's focused purely on email delivery and automation.
Does Plunk have landing pages like ConvertKit?
No, Plunk doesn't include landing page or form builders. It's focused on being the best email platform for developers. If you need landing pages, you'd build them with your preferred tools and connect them to Plunk's API. This gives you full design control and keeps Plunk lightweight and developer-friendly.
How easy is it to migrate from ConvertKit to Plunk?
Migration is straightforward. Export your subscribers from ConvertKit as CSV, import them to Plunk via our API or dashboard, recreate your email sequences using our workflow builder, and update your forms to use Plunk's API. Most migrations can be completed in a few hours. You'll need to rebuild landing pages separately if you rely on ConvertKit's landing page feature.
Ready for a developer-first email platform?
Join developers who've switched from ConvertKit to Plunk for better API design and transparent pay-as-you-go pricing.