head to head · open source
Plunk vs DoubleZero
Plunk has 5,474 GitHub stars, 401 forks, 61 open issues and last shipped 4 days ago. DoubleZero has 1,248 stars, 65 forks, 9 open issues and last shipped 1.9 years ago. Plunk leads on adoption by 339% (5,474 vs 1,248 stars). Plunk is written in TypeScript under AGPL-3.0; DoubleZero is written in Elixir under AGPL-3.0. Plunk has attracted 7% as many forks as stars, DoubleZero 5%. 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 | DoubleZero | |
|---|---|---|
| GitHub stars | ★ 5.5K | ★ 1.2K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | TypeScript | Elixir |
| Last push | 2026-09-14 | 2024-10-22 |
| Forks | ⑂ 401 | ⑂ 65 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Plunk if
- You weight community size — 5.5K 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 DoubleZero if
- You want the DoubleZero feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Elixir
- You evaluated both and DoubleZero fits your workflow better
About Plunk
Plunk is an open source email platform written in TypeScript and released under the AGPL 3.0 license. It combines transactional email, marketing campaigns, and workflow automation in a single system, and it is positioned as a self hosted alternative to SendGrid, Resend, and Mailgun. The project lives in the TypeScript and Node.js ecosystem, ships as a Docker image, and is documented at docs.useplunk.com with a community Discord for support.
read the full Plunk overview →
About DoubleZero
DoubleZero, also called 00, is a self hosted email dashboard for developers. It is written in Elixir, released under AGPL 3.0, and lives in the AWS Simple Email Service ecosystem. The README describes it as a dashboard for sending and monitoring emails with AWS SES.
read the full DoubleZero overview →
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Frequently asked questions
Is Plunk or DoubleZero more popular?
Plunk has 5,474 GitHub stars and DoubleZero has 1,248. Plunk has the larger community by that measure.
Are Plunk and DoubleZero free?
Both are open source. Plunk is licensed under AGPL-3.0 and DoubleZero under AGPL-3.0. Neither carries a licence fee.
What is the difference between Plunk and DoubleZero?
Plunk is written in TypeScript and DoubleZero in Elixir. 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 DoubleZero?
Choose Plunk if you want the larger community (5,474 stars) or its AGPL-3.0 licence terms. Choose DoubleZero if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.