head to head · open source
Hoppscotch vs greenmail
Hoppscotch has 80,724 GitHub stars, 6,225 forks, 820 open issues and last shipped 3 days ago. greenmail has 749 stars, 205 forks, 67 open issues and last shipped yesterday. Hoppscotch leads on adoption by 10,678% (80,724 vs 749 stars). Hoppscotch is written in TypeScript under MIT; greenmail is written in Java under Apache-2.0. Hoppscotch has attracted 8% as many forks as stars, greenmail 27%. greenmail 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
| Hoppscotch | greenmail | |
|---|---|---|
| GitHub stars | ★ 81K | ★ 749 |
| License | MIT | Apache-2.0 |
| Written in | TypeScript | Java |
| Last push | 2026-10-31 | 2026-11-02 |
| Forks | ⑂ 6.2K | ⑂ 205 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Hoppscotch if
- You weight community size — 81K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick greenmail if
- You want the greenmail feature set and don't need the biggest community
- You prefer the Apache-2.0 license terms
- Your stack matches Java
- You evaluated both and greenmail fits your workflow better
About Hoppscotch
Hoppscotch Open Source API Development Ecosystem Built with ❤︎ by contributors We highly recommend you take a look at the Hoppscotch Documentation to learn more about the app. Support Features ❤️ Lightweight: Crafted with minimalistic UI design. ⚡️ Fast: Send requests and get responses in real time. 🗄️ HTTP Methods: Request methods define the type of action you are requesting to be performed. GET Requests retrieve resource information POST The server creates a new entry in a database PUT Updates an existing resource PATCH Very similar to PUT but makes a partial update on a resource DELETE Deletes resource or…
read the full Hoppscotch overview →
About greenmail
GreenMail [ ][docker hub] [GreenMail][greenmail project site] allows developers to test email based applications, services or systems without access to a live mail server. Developers can send, receive, and verify emails by embedding GreenMail in a unit test or running it as a standalone container. GreenMail acts as a virtual (mocking/sandbox) mail server and supports common mail protocols SMTP, IMAP and POP3. [Examples][greenmail examples] [Javadoc][greenmail javadoc] [FAQ][greenmail faq] [Download][greenmail download] [Maven coordinates][maven repository com]: com.icegreen:greenmail:\ The separate GreenMail…
read the full greenmail overview →
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Frequently asked questions
Is Hoppscotch or greenmail more popular?
Hoppscotch has 80,724 GitHub stars and greenmail has 749. Hoppscotch has the larger community by that measure.
Are Hoppscotch and greenmail free?
Both are open source. Hoppscotch is licensed under MIT and greenmail under Apache-2.0. Neither carries a licence fee.
What is the difference between Hoppscotch and greenmail?
Hoppscotch is written in TypeScript and greenmail in Java. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Hoppscotch or greenmail?
Choose Hoppscotch if you want the larger community (80,724 stars) or its MIT licence terms. Choose greenmail if its feature set, stack or Apache-2.0 licence fits better. Both are self-hostable.