head to head · open source
Plunk vs DoubleZero
Plunk has 5,573 GitHub stars, 429 forks, 61 open issues and last shipped 2 days ago. DoubleZero has 1,246 stars, 65 forks, 9 open issues and last shipped 2.0 years ago. Plunk leads on adoption by 347% (5,573 vs 1,246 stars). Plunk is written in TypeScript under AGPL-3.0; DoubleZero is written in Elixir under AGPL-3.0. Plunk has attracted 8% 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 | ★ 5.6K | ★ 1.2K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | TypeScript | Elixir |
| Last push | 2026-11-01 | 2024-10-22 |
| Forks | ⑂ 429 | ⑂ 65 |
| 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 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 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 DoubleZero
00 is a self hostable SES dashboard for sending and monitoring emails with AWS. SES is an incredibly affordable way to build an email heavy application. However monitoring the emails is a bit of a nightmare, and often requires custom infrastructure. Even setting up the SES SNS SQS pipeline is a headache for developers unfamiliar with AWS. And when that is done your still left with hooking in or building custom some dashboard for viewing bounces and all the vital information you care about. 00 provides an SST configuration step to set up the SES SNS SQS pipeline, so you can just run a command and let SST do the…
read the full DoubleZero overview →
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Frequently asked questions
Is Plunk or DoubleZero more popular?
Plunk has 5,573 GitHub stars and DoubleZero has 1,246. 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 (5,573 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.