Plunk
by Plunk · Open-source transactional, marketing and automation email in one platform
63.2 — BenchRank score out of 100
Screenshots of Plunk
Homepage Pricing page
Overview
Plunk is an open-source email platform covering transactional sending, marketing campaigns and workflow automation in one tool. It provides API and SMTP delivery, a visual builder for triggered sequences with delays and conditions, dynamic segments, broadcasts, inbound email with webhooks, and custom domains with DKIM, SPF and DMARC. It runs on Plunk's EU-hosted cloud or self-hosted with Docker Compose.
- Best for
- Developers and small teams wanting transactional, campaign and automation email in one self-hostable tool
- Pricing
- Free plan covers 1,000 emails a month; the paid plan is usage-based at $0.001 per email with unlimited contacts, and self-hosting is free.
- Runs on
- WebSelf-hosted
Strengths and trade-offs
Strengths
- AGPL-3.0 licensed, self-hostable via Docker Compose
- Unlimited contacts on every plan; billed only on sends
- All features on every plan, with no locked modules or add-ons
- Transactional, campaign and workflow events on one contact record
Trade-offs
- Free plan caps at 1,000 emails a month and adds Plunk branding
- Self-hosting puts sending infrastructure and upkeep on your own team
- Pages state no support commitments, SLA or deliverability guarantees
Pricing
Published plans from Plunk’s own pricing page, in USD. Usage charges and add-ons may apply on top.
| Plan | Monthly | Includes |
|---|---|---|
| Free forever | — |
|
| Pay as you grow | —per email |
|
How this score is made up
Each dimension is scored out of 100 and combined into the headline score using fixed weights.
- MCP support
- 0 out of 100
- API quality
- 65 out of 100
- Documentation
- 70 out of 100
- Agent friendliness
- 85 out of 100
- Pricing transparency
- 100 out of 100
- Changelog
- 80 out of 100
- Marketing site structure
- 95 out of 100
- Operational trust
- 40 out of 100
Measured, but not part of the score
Useful to know, but not a mark for or against the product — so these do not affect the ranking.
- Openness
- 65 out of 100
- Maintenance
- 100 out of 100
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