head to head · open source
espectre vs homeassistant-powercalc
espectre has 9,778 GitHub stars, 743 forks, 13 open issues and last shipped 2 days ago. homeassistant-powercalc has 1,643 stars, 442 forks, 17 open issues and last shipped 2 days ago. espectre leads on adoption by 495% (9,778 vs 1,643 stars). espectre is written in Python under GPL-3.0; homeassistant-powercalc is written in Python under MIT. espectre has attracted 8% as many forks as stars, homeassistant-powercalc 27%. 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.
← all 20902 open source comparisons
Side by side
| espectre | homeassistant-powercalc | |
|---|---|---|
| GitHub stars | ★ 9.8K | ★ 1.6K |
| License | GPL-3.0 | MIT |
| Written in | Python | Python |
| Last push | 2026-11-07 | 2026-11-07 |
| Forks | ⑂ 743 | ⑂ 442 |
| 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 homeassistant-powercalc if
- You want the homeassistant-powercalc feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Python
- You evaluated both and homeassistant-powercalc 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 homeassistant-powercalc
⚡ Turn any device into an energy monitor, no smart plug required PowerCalc estimates energy consumption for devices that can't measure it themselves, like lights, fans and media players, with no extra hardware. Instead of measuring power directly, it accurately estimates consumption using smart models based on real measurements, all inside Home Assistant. On top of power and energy sensors, PowerCalc also creates cost sensors to track spending, utility meters to break usage down by day, week or month, and group sensors to combine devices, rooms or your whole home into a single total. See it in action Why use…
read the full homeassistant-powercalc overview →
More in Miscellaneous
Related comparisons
More Internet of Things (IoT) projects
Compare either of these against the rest of the Internet of Things (IoT) field.
Frequently asked questions
Is espectre or homeassistant-powercalc more popular?
espectre has 9,778 GitHub stars and homeassistant-powercalc has 1,643. espectre has the larger community by that measure.
Are espectre and homeassistant-powercalc free?
Both are open source. espectre is licensed under GPL-3.0 and homeassistant-powercalc under MIT. Neither carries a licence fee.
What is the difference between espectre and homeassistant-powercalc?
espectre is written in Python and homeassistant-powercalc in Python. 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 homeassistant-powercalc?
Choose espectre if you want the larger community (9,778 stars) or its GPL-3.0 licence terms. Choose homeassistant-powercalc if its feature set, stack or MIT licence fits better. Both are self-hostable.