head to head · open source
useSend vs Sessy
useSend has 4,775 GitHub stars, 447 forks, 37 open issues and last shipped 3 days ago. Sessy has 944 stars, 44 forks, 7 open issues and last shipped 4 days ago. useSend leads on adoption by 406% (4,775 vs 944 stars). useSend is written in TypeScript under AGPL-3.0; Sessy is written in Ruby under a custom or non-standard licence. useSend has attracted 9% as many forks as stars, Sessy 5%. 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 | Sessy | |
|---|---|---|
| GitHub stars | ★ 4.8K | ★ 944 |
| License | AGPL-3.0 | Custom / other |
| Written in | TypeScript | Ruby |
| Last push | 2026-10-31 | 2026-10-30 |
| Forks | ⑂ 447 | ⑂ 44 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick useSend if
- You weight community size — 4.8K 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 Sessy if
- You want the Sessy feature set and don't need the biggest community
- You prefer the Custom / other license terms
- Your stack matches Ruby
- You evaluated both and Sessy fits your workflow better
About useSend
The Open Source sending infrastructure. Learn more » Discord . Website · Issues About this project As most of email products out there, useSend also uses Amazon SES under the hood to send emails. We provide an open and alternative way to send emails reliably and cheaply with a great dashboard. You can also use useSend manage contacts and send bulk emails(newsletter, product updates etc). We will take care of the subscriptions. Currently we only support emails, but we plan to expand to other sending protocols like SMS, push notification and even whatsapp. We are currently in beta! Features [x] Add domains [x]…
read the full useSend overview →
About Sessy
Sessy Open source email observability for AWS SES by Marc Köhlbrugge. What is Sessy? Amazon SES is a fantastic email service: cost effective, reliable, and great deliverability. But it's frustratingly difficult to see what's actually happening with your emails. That's why many people turn to overpriced email services that are often just glorified SES wrappers with a nice UI. You end up paying a lot for something you could do yourself. Sessy is the open source alternative. Use raw SES and still get a beautiful interface to see what happens after you hit send: deliveries, bounces, complaints, opens, clicks, and…
read the full Sessy overview →
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Frequently asked questions
Is useSend or Sessy more popular?
useSend has 4,775 GitHub stars and Sessy has 944. useSend has the larger community by that measure.
Are useSend and Sessy free?
Both are open source. useSend is licensed under AGPL-3.0, and Sessy has no licence declared in this registry. Both are free to self-host.
What is the difference between useSend and Sessy?
useSend is written in TypeScript and Sessy in Ruby. 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 Sessy?
Choose useSend if you want the larger community (4,775 stars) or its AGPL-3.0 licence terms. Choose Sessy if its feature set, stack or Custom / other licence fits better. Both are self-hostable.