Vendors / Plunk
Plunk
Named in 1 of 50 AI answers across 1 category in September 2026. Best position: Transactional email, 2% answer share, ranked #12, named first in 0%.
2%
Best share Transactional email
What Plunk is
Plunk is an open-source email platform for teams that would otherwise use separate tools for transactional sending, marketing campaigns and automation. It keeps these activities on one contact list, with unlimited contacts. Its free plan includes 1,000 emails a month, and paid use costs $0.001 per email.
Teams send transactional emails and campaigns from that shared list. Workflows begin when an app sends an event, then can include emails, delays, branches and webhooks. Segments target subsets of contacts using contact fields, custom data and email activity. Plunk also supports inbound email through an MX record, turning replies into contacts that can start workflows.
By category
First edition
| Category | Rank | Answer share | Named first | Models | Δ |
|---|---|---|---|---|---|
| Transactional emailStartup stack | #12 of 12 | 0% | Claude Opus 5 | new |
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