head to head · open source
useSend vs DoubleZero
useSend has 4,686 GitHub stars, 421 forks, 37 open issues and last shipped 10 days ago. DoubleZero has 1,248 stars, 65 forks, 9 open issues and last shipped 1.9 years ago. useSend leads on adoption by 275% (4,686 vs 1,248 stars). useSend is written in TypeScript under AGPL-3.0; DoubleZero is written in Elixir under AGPL-3.0. useSend has attracted 9% as many forks as stars, DoubleZero 5%. useSend 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
| useSend | DoubleZero | |
|---|---|---|
| GitHub stars | ★ 4.7K | ★ 1.2K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | TypeScript | Elixir |
| Last push | 2026-09-08 | 2024-10-22 |
| Forks | ⑂ 421 | ⑂ 65 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick useSend if
- You weight community size — 4.7K 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 useSend
useSend is open source sending infrastructure, positioned directly as an alternative to Resend, Sendgrid and Postmark, and written in TypeScript under the AGPL 3.0 license. It lives in the email and communication ecosystem, filed under Productivity & Utilities / Email & Communication. Like most email products on the market, it uses Amazon SES under the hood to transmit messages, and it wraps that delivery layer in an open dashboard for sending reliably and cheaply. The project's stated premise is simple: pay per email sent, rather than paying for contact storage. The repository carries 4676 stars, 421 forks and 3…
read the full useSend 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 useSend or DoubleZero more popular?
useSend has 4,686 GitHub stars and DoubleZero has 1,248. useSend has the larger community by that measure.
Are useSend and DoubleZero free?
Both are open source. useSend is licensed under AGPL-3.0 and DoubleZero under AGPL-3.0. Neither carries a licence fee.
What is the difference between useSend and DoubleZero?
useSend 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, useSend or DoubleZero?
Choose useSend if you want the larger community (4,686 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.