head to head · open source
operating-system vs homeassistant-powercalc
operating-system has 7,492 GitHub stars, 1,293 forks, 95 open issues and last shipped 2 days ago. homeassistant-powercalc has 1,583 stars, 423 forks, 17 open issues and last shipped 2 days ago. operating-system leads on adoption by 373% (7,492 vs 1,583 stars). operating-system is written in Python under Apache-2.0; homeassistant-powercalc is written in Python under MIT. operating-system has attracted 17% as many forks as stars, homeassistant-powercalc 27%. homeassistant-powercalc was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 3 topic tags (hacktoberfest, home-assistant, iot), 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
| operating-system | homeassistant-powercalc | |
|---|---|---|
| GitHub stars | ★ 7.5K | ★ 1.6K |
| License | Apache-2.0 | MIT |
| Written in | Python | Python |
| Last push | 2026-09-23 | 2026-09-23 |
| Forks | ⑂ 1.3K | ⑂ 423 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick operating-system if
- You weight community size — 7.5K stars and counting
- You want the Apache-2.0 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 operating-system
The Home Assistant Operating System is a Linux based operating system built specifically to host Home Assistant and its Apps, intended for people running Home Assistant on a single board computer such as a Raspberry Pi or ODROID, or on an x86 64 machine with UEFI firmware.
read the full operating-system overview →
About homeassistant-powercalc
PowerCalc is a free, MIT licensed Home Assistant custom component that estimates the power and energy consumption of lights, fans, media players and other appliances that cannot measure themselves, letting Home Assistant users monitor energy across a whole home without fitting a smart plug to every device.
read the full homeassistant-powercalc overview →
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Frequently asked questions
Is operating-system or homeassistant-powercalc more popular?
operating-system has 7,492 GitHub stars and homeassistant-powercalc has 1,583. operating-system has the larger community by that measure.
Are operating-system and homeassistant-powercalc free?
Both are open source. operating-system is licensed under Apache-2.0 and homeassistant-powercalc under MIT. Neither carries a licence fee.
What is the difference between operating-system and homeassistant-powercalc?
operating-system 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, operating-system or homeassistant-powercalc?
Choose operating-system if you want the larger community (7,492 stars) or its Apache-2.0 licence terms. Choose homeassistant-powercalc if its feature set, stack or MIT licence fits better. Both are self-hostable.