Head-to-Head Comparison · Alternative to Mailchimp · 📮 newsletters
Mailchimp vs Plunk
Campaigns, transactional mail and workflows together; audience CRM depth is thinner. Here is how Plunk ($0/mo open source) stacks up against Mailchimp ($20/mo) across cost, hosting, data privacy, and real-world trade-offs.
Mailchimp vs Plunk Specification Matrix
facts verified 2026-08-10
| Dimension | Mailchimp (Paid) | Plunk (Replacement) |
|---|---|---|
| Monthly Price | $20 / mo | $0 / mo |
| 1-Year Cost (1 seat) | $240 / yr | $0 / yr (Save $240) |
| 1-Year Cost (5 seats) | $1,200 / yr | $0 / yr (Save $1,200) |
| 1-Year Cost (10 seats) | $2,400 / yr | $0 / yr (Save $2,400) |
| Source & License | Proprietary SaaS | open source AGPL-3.0 |
| Where It Runs | Vendor Cloud | Local or hosted (your machine or their cloud) |
| Platforms | Web / Cloud | webself-hosteddocker to self-host |
| GitHub Stars | — | ★ 5.3k (active aug 2026) |
Deep Dive: Switching from Mailchimp to Plunk
Trade-offs, installation & data architecture
What you trade away
Plunk's audience CRM, template ecosystem, campaign analytics, and non-technical marketing workflow are noticeably thinner than Mailchimp's.
How to deploy Plunk
Hosted signup, or the official Docker Compose stack
What it takes to run
Hosted use still needs domain authentication; self-hosting adds PostgreSQL, Redis, MinIO, Nginx or another proxy, exposed web and SMTP services, DNS, and ongoing deliverability work.
Where your data lives
The self-hosted stack stores core data in PostgreSQL, jobs and cache in Redis, and objects in MinIO; hosted data is kept in Plunk's EU infrastructure.
Why fork Plunk instead of vibe-coding a Mailchimp clone?
A campaign sender is buildable, but Mailchimp's value is deliverability, templates, compliance, automations, segmentation, ecommerce integrations, and support.
Mailchimp vs Plunk FAQ
Is Plunk a good free alternative to Mailchimp?+
Yes. Plunk is a verified open-source (AGPL-3.0) replacement for Mailchimp. Campaigns, transactional mail and workflows together; audience CRM depth is thinner.
What is the catch when switching from Mailchimp to Plunk?+
Plunk's audience CRM, template ecosystem, campaign analytics, and non-technical marketing workflow are noticeably thinner than Mailchimp's.
How much do you save switching from Mailchimp to Plunk?+
Mailchimp costs $20/mo ($240/yr) per seat, whereas Plunk is $0/mo. Switching saves $240/yr for a solo user, $1,200/yr for a 5-person team, and $2,400/yr for a 10-person team.
How do I install or self-host Plunk instead of Mailchimp?+
Install: Hosted signup, or the official Docker Compose stack. Setup: Hosted use still needs domain authentication; self-hosting adds PostgreSQL, Redis, MinIO, Nginx or another proxy, exposed web and SMTP services, DNS, and ongoing deliverability work.
