head to head · open source
useSend vs UnInbox
useSend has 4,686 GitHub stars, 421 forks, 37 open issues and last shipped 10 days ago. UnInbox has 1,757 stars, 127 forks, 42 open issues and last shipped 7 months ago. useSend leads on adoption by 167% (4,686 vs 1,757 stars). useSend is written in TypeScript under AGPL-3.0; UnInbox is written in TypeScript under a custom or non-standard licence. useSend has attracted 9% as many forks as stars, UnInbox 7%. useSend was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (email), so they are genuine substitutes rather than adjacent tools.
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 | UnInbox | |
|---|---|---|
| GitHub stars | ★ 4.7K | ★ 1.8K |
| License | AGPL-3.0 | Custom / other |
| Written in | TypeScript | TypeScript |
| Last push | 2026-09-08 | 2026-02-11 |
| Forks | ⑂ 421 | ⑂ 127 |
| 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 UnInbox if
- You want the UnInbox feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches TypeScript
- You evaluated both and UnInbox 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 UnInbox
UnInbox is an open source communication infrastructure project for teams and professionals, built in the TypeScript and Next.js ecosystem and positioned as a modern replacement for outdated email tools. It presents itself as a web application that reimagines email communication for current workflows, while still working with existing email infrastructure or replacing it entirely.
read the full UnInbox overview →
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Frequently asked questions
Is useSend or UnInbox more popular?
useSend has 4,686 GitHub stars and UnInbox has 1,757. useSend has the larger community by that measure.
Are useSend and UnInbox free?
Both are open source. useSend is licensed under AGPL-3.0, and UnInbox has no licence declared in this registry. Both are free to self-host.
What is the difference between useSend and UnInbox?
useSend is written in TypeScript and UnInbox 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, useSend or UnInbox?
Choose useSend if you want the larger community (4,686 stars) or its AGPL-3.0 licence terms. Choose UnInbox if its feature set, stack or Custom / other licence fits better. Both are self-hostable.