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Price Snapshot
How much does Plunk cost?
Plunk is free to use. 1,000 emails/month, unlimited contacts, no credit card. Carries Plunk branding. Past the 1,000 free monthly emails it is metered rather than subscription-based: $0.001 per email sent, so 10,000 emails costs $10.
WHAT THIS CATEGORY COSTS AS YOU SCALE
Email Marketing pricing by list size
The middle of the market at each level, across every Email Marketing tool on this site that publishes a price there. Going from 500 contacts to 100,000 contacts multiplies the typical bill by 37.5×.
HubSpot(most reviewed, 40,490)Cheapest here:
Zoho Campaigns$4/mo
HubSpot$20Cheapest here:Zoho Campaigns$7/mo
Cheapest here:Zoho Campaigns$17/mo
HubSpot$220Cheapest here:
Ghost$18/mo
HubSpot$470Cheapest here:Ghost$18/mo
HubSpot$1,220Cheapest here:Ghost$18/mo
HubSpot$2,470Cheapest here:Ghost$18/mo
HubSpot$5,350Cheapest here:Ghost$18/mo
Each median is the middle price of the cheapest plan covering that level, across the 36 Email Marketing tools on this site. Tools that publish no price at a level are excluded from that row rather than estimated, which is why coverage varies. “Most reviewed” uses combined third-party review counts as a stand-in for popularity. These are list prices before overage, add-ons and seat charges.
Recommendation
Which plan should you choose?
API-first design and pay-per-use pricing aligns with project-based work.
1,000 emails monthly covers most testing and small newsletter needs.
At $1 per 1,000 emails, this beats traditional platforms for serious volume.
MCP server integration and API access enable seamless automation.
Editorial
My take on Plunk pricing
Plunk's pricing is brutally honest and developer-friendly. $0.001 per email means sending 10,000 emails costs $10, not $50+ like most platforms. The lack of monthly fees is refreshing, but you need to track usage carefully since costs can creep up with high volume.
The community-built MCP server lets you control email campaigns directly from Claude or ChatGPT, which is perfect if you're building automated workflows. Being open-source means no vendor lock-in, but also means you're responsible for hosting and maintenance if you go the self-hosted route.
Verdict
Is Plunk Worth the Price?
Plunk's pricing makes sense if you understand exactly what you're getting. This isn't Mailchimp with drag-and-drop builders and marketing templates. It's a developer-focused email API with transparent per-email pricing.
If you need fancy automation workflows, look at ActiveCampaign. If you want the cheapest way to send transactional emails or simple newsletters, Plunk delivers.
FAQ
Frequently Asked Questions
Plunk charges $0.001 per email sent after you exceed the 1,000 free monthly emails. This means 10,000 emails cost $10.
No monthly fees. You only pay for emails actually sent at $0.001 each.
1,000 emails per month, unlimited contacts, email templates, basic analytics, and full API access.
Yes, Plunk is open-source and offers self-hosting options for complete control over your email infrastructure.
Plunk focuses on transactional and broadcast emails. For advanced automation workflows, consider dedicated marketing platforms like ActiveCampaign or Kit.
At $0.001 per email, Plunk is significantly cheaper than platforms like Mailchimp or Constant Contact for high-volume sending, but lacks their marketing features.
Yes, Plunk provides a REST API and even has a community-built MCP server for AI assistant integration.
See the pricing for yourself
Check the official pricing page for current rates.
View Plunk PricingMore on Plunk
Joonas Rotko
Author & founder of That Marketing Buddy
I score marketing software for AI-stack fit (MCP, API, agent-readiness), backed by 10+ years in digital marketing. Building the most trustworthy marketing software database so you can trust the pricing data on this site.
This page may contain affiliate links. I earn a commission at no extra cost to you. This never influences pricing data.