Open-Source
Email Platform
Transactional emails, marketing campaigns, and workflow automation in one platform. Open-source, self-hostable, $0.001 per email, no contact limits.
Replace your email stack
The open-source alternative to Resend, SendGrid, Mailchimp, and more
Most email tools weren't built to scale
Complex setup
Most email platforms take days to configure. Plunk is up and running in under 5 minutes.
Contact limits
Other platforms charge more as your list grows. Plunk stores unlimited contacts for free.
Vendor lock-in
Closed-source platforms own your stack. Plunk is AGPL-3.0 licensed and fully self-hostable.
Built for scale
Everything you need to run email at any volume
Workflow Automation
Visual builder for complex email sequences with triggers, delays, and conditional logic. No code required.
Dynamic Segments
Real-time audience segmentation based on contact data and behavior. Less noise, more signal.
Campaign Management
Broadcast emails with scheduling and performance tracking. Send the right message at the right time.
Analytics
Detailed metrics on opens, clicks, bounces, and conversions across campaigns.
Inbound Email
Receive and process incoming emails with webhook notifications. Your inbox, automated.
Custom Domains
Brand consistency with DKIM authentication and custom sending domains. Yes, even in Outlook.
One contact, complete history
Every interaction flows into a single contact record. Transactional emails, campaigns, and workflows, all tracked in one place.
Transactional
Receipts, password resets
Campaigns
Newsletters, announcements
Workflows
Onboarding, drip sequences
Open source, privacy first
AGPL-3.0 licensed, EU-hosted, and GDPR compliant. Inspect the code, self-host on your own infrastructure, or use our cloud.
Open Source
AGPL-3.0 licensed
5K+ stars on GitHub
Privacy First
EU hosted
GDPR compliant
Self-Hostable
Deploy anywhere
Docker Compose ready
Simple, transparent pricing
Pay for what you use, nothing more. No surprises at scale.
Calculated based on the plan that best matches the features of Plunk at 10.000 emails per month.
Trusted by the best
Transparent and intuitive UI, extremely easy setup & automation and great support.
Lots of care put into Plunk
I've been using Plunk for building & sending out marketing emails and genuinely love it!
I loved the ease of use, beautiful UI and great UX. Everything simply works.
Simple to use, efficient and no regrets!
Clean design, easy to understand, fair pricing.
Start sending in 5 minutes
1,000 emails free every month. Then $0.001 per email. No contact limits, no surprises.