head to head · open source
espectre vs HaCasa
espectre has 9,778 GitHub stars, 743 forks, 13 open issues and last shipped 2 days ago. HaCasa has 500 stars, 58 forks, 23 open issues and last shipped 8 days ago. espectre leads on adoption by 1,856% (9,778 vs 500 stars). espectre is written in Python under GPL-3.0; HaCasa is written in JavaScript under MIT. espectre has attracted 8% as many forks as stars, HaCasa 12%. espectre was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (home-assistant), 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
| espectre | HaCasa | |
|---|---|---|
| GitHub stars | ★ 9.8K | ★ 500 |
| License | GPL-3.0 | MIT |
| Written in | Python | JavaScript |
| Last push | 2026-11-07 | 2026-11-01 |
| Forks | ⑂ 743 | ⑂ 58 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick espectre if
- You weight community size — 9.8K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick HaCasa if
- You want the HaCasa feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches JavaScript
- You evaluated both and HaCasa fits your workflow better
About espectre
ESPectre Turn an ESP32 into a private, local Wi Fi motion sensor. When someone moves through a room, they change the way Wi Fi signals travel through it. ESPectre reads those changes and reports motion in real time. No camera, no microphone, no wearable, and no dedicated radar hardware: just a supported ESP32 and the Wi Fi network already in the room. ESPectre is an open source platform that brings together ready to flash firmware, an embeddable C++ SDK, a MicroPython implementation, browser tools, a host CLI, an open dataset, open model weights, and the research workflow used to build and validate the…
read the full espectre overview →
About HaCasa
The HaCasa reboot. A room first Home Assistant panel, built on the Homio design by iamtherufus. Documentation · Demo video · Install · Discussions · Discord · Screenshots · HaCasa v2 (legacy) ▶ Watch the 40 second demo ⚠️ HaCasa Nova is a work in progress and needs testing. This first release has only been run on a handful of homes, so expect rough edges: things may break or change between versions. Try it next to your current dashboard rather than replacing it, and please report what you run into. Known issues are tracked in 158. Why a reboot? HaCasa started as a set of button card templates: a calm, good…
read the full HaCasa overview →
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Frequently asked questions
Is espectre or HaCasa more popular?
espectre has 9,778 GitHub stars and HaCasa has 500. espectre has the larger community by that measure.
Are espectre and HaCasa free?
Both are open source. espectre is licensed under GPL-3.0 and HaCasa under MIT. Neither carries a licence fee.
What is the difference between espectre and HaCasa?
espectre is written in Python and HaCasa in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, espectre or HaCasa?
Choose espectre if you want the larger community (9,778 stars) or its GPL-3.0 licence terms. Choose HaCasa if its feature set, stack or MIT licence fits better. Both are self-hostable.