head to head · open source
Plunk vs AgentMail
Plunk has 5,573 GitHub stars, 429 forks, 61 open issues and last shipped 2 days ago. AgentMail has 41 stars, 17 forks, 3 open issues and last shipped 5 days ago. Plunk leads on adoption by 13,493% (5,573 vs 41 stars). Plunk is written in TypeScript under AGPL-3.0; AgentMail is written in TypeScript under MIT. Plunk has attracted 8% as many forks as stars, AgentMail 41%. Plunk was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| Plunk | AgentMail | |
|---|---|---|
| GitHub stars | ★ 5.6K | ★ 41 |
| License | AGPL-3.0 | MIT |
| Written in | TypeScript | TypeScript |
| Last push | 2026-11-01 | 2026-10-29 |
| Forks | ⑂ 429 | ⑂ 17 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Plunk if
- You weight community size — 5.6K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick AgentMail if
- You want the AgentMail feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and AgentMail fits your workflow better
About Plunk
Plunk The Open Source Email Platform Introduction Transactional emails, marketing campaigns, and workflow automation — in one platform. Self hostable, $0.001 per email, no contact limits. An open source, self hosted alternative to tools SendGrid, Resend or Mailgun. Features Transactional Emails : Send emails straight from your API with template support and variable substitution SMTP : Use Plunk as an SMTP relay to send emails from any existing tool or framework Campaigns : Send newsletters and product updates to large audiences Workflows : Create advanced automations with triggers, delays, and conditional logic…
read the full Plunk overview →
About AgentMail
Agentmail TypeScript Library The Agentmail TypeScript library provides convenient access to the Agentmail APIs from TypeScript. Table of Contents Installation Reference Usage Environments Request and Response Types Exception Handling Binary Response Advanced Subpackage Exports Additional Headers Additional Query String Parameters Retries Timeouts Aborting Requests Access Raw Response Data Logging Custom Fetch Runtime Compatibility Contributing Installation Reference A full reference for this library is available here. Usage Instantiate and use the client with the following: Environments This SDK allows you to…
read the full AgentMail overview →
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Frequently asked questions
Is Plunk or AgentMail more popular?
Plunk has 5,573 GitHub stars and AgentMail has 41. Plunk has the larger community by that measure.
Are Plunk and AgentMail free?
Both are open source. Plunk is licensed under AGPL-3.0 and AgentMail under MIT. Neither carries a licence fee.
What is the difference between Plunk and AgentMail?
Plunk is written in TypeScript and AgentMail in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Plunk or AgentMail?
Choose Plunk if you want the larger community (5,573 stars) or its AGPL-3.0 licence terms. Choose AgentMail if its feature set, stack or MIT licence fits better. Both are self-hostable.