ActiveCampaign
Email marketing and CRM platform for customer experience automation
Open-Source Projects
Discover top open-source software, updated regularly with real-world adoption signals.
Discover top open-source software, updated regularly with real-world adoption signals.
Self-hosted email platform powered by AWS SES
Plunk lets developers send transactional emails, run automations, and broadcast newsletters directly via AWS SES, offering a self-hosted alternative to services like SendGrid.
Plunk is a developer‑focused email platform that runs on AWS Simple Email Service (SES). It provides a single API to send transactional messages, define automation workflows, and broadcast newsletters, positioning itself as a self‑hosted alternative to commercial services such as SendGrid, Resend, or Mailgun.
Ideal for teams already using AWS or those who want full control over email data. Plunk is distributed as a Docker image (driaug/plunk), enabling quick spin‑up on any container‑compatible host. Detailed deployment instructions are available in the documentation, and the AGPL‑3.0 license ensures the code remains freely modifiable.
All features leverage AWS SES’s deliverability and scalability while keeping the operational stack minimal.
When teams consider Plunk, these hosted platforms usually appear on the same shortlist.
Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.
Order confirmation emails
Send reliable transactional messages instantly after purchase, ensuring customers receive receipts.
User onboarding automation
Trigger welcome series based on sign‑up events without external services.
Monthly newsletter distribution
Broadcast updates to thousands of subscribers using a single API call.
Password reset flows
Deliver secure, time‑sensitive reset links directly via AWS SES.
Yes, Plunk relies on AWS SES, so an active AWS account with SES permissions is required.
Plunk is built specifically for AWS SES; using other providers would require custom integration.
The core project provides API endpoints; a UI can be built on top or integrated from third‑party tools.
Scaling is delegated to AWS SES, which manages high‑throughput sending; the Docker container can be replicated as needed.
Any modifications that are deployed over a network must be made available under the same license, which may affect proprietary use.
Project at a glance
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