head to head · open source
Hoppscotch vs ATAC
Hoppscotch has 80,331 GitHub stars, 6,110 forks, 820 open issues and last shipped 2 days ago. ATAC has 3,729 stars, 137 forks, 20 open issues and last shipped 15 days ago. Hoppscotch leads on adoption by 2,054% (80,331 vs 3,729 stars). Hoppscotch is written in TypeScript under MIT; ATAC is written in Rust under MIT. Hoppscotch has attracted 8% as many forks as stars, ATAC 4%. Hoppscotch was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (api, api-client), 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
| Hoppscotch | ATAC | |
|---|---|---|
| GitHub stars | ★ 80K | ★ 3.7K |
| License | MIT | MIT |
| Written in | TypeScript | Rust |
| Last push | 2026-09-16 | 2026-09-03 |
| Forks | ⑂ 6.1K | ⑂ 137 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Hoppscotch if
- You weight community size — 80K stars and counting
- You want the MIT license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick ATAC if
- You want the ATAC feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Rust
- You evaluated both and ATAC fits your workflow better
About Hoppscotch
Hoppscotch is an open source API development ecosystem that provides a full featured client for designing, testing, and documenting APIs. It operates as a web based application, desktop app, and CLI tool, supporting offline, on premises, and cloud deployments. Built with TypeScript and licensed under MIT, it serves as a direct open source alternative to proprietary tools like Postman and Insomnia.
read the full Hoppscotch overview →
About ATAC
ATAC is a terminal API client written in Rust and licensed under MIT. It lives in the developer tools and API development and testing ecosystem, and it targets users who want a Postman like workflow without leaving a terminal. The project describes itself as Arguably a Terminal API Client, and it is based on clients such as Postman, Insomnia, and Bruno.
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Frequently asked questions
Is Hoppscotch or ATAC more popular?
Hoppscotch has 80,331 GitHub stars and ATAC has 3,729. Hoppscotch has the larger community by that measure.
Are Hoppscotch and ATAC free?
Both are open source. Hoppscotch is licensed under MIT and ATAC under MIT. Neither carries a licence fee.
What is the difference between Hoppscotch and ATAC?
Hoppscotch is written in TypeScript and ATAC in Rust. 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 ATAC?
Choose Hoppscotch if you want the larger community (80,331 stars) or its MIT licence terms. Choose ATAC if its feature set, stack or MIT licence fits better. Both are self-hostable.