head to head · open source
operating-system vs homeassistant-powercalc
operating-system has 7,634 GitHub stars, 1,335 forks, 95 open issues and last shipped 3 days ago. homeassistant-powercalc has 1,643 stars, 442 forks, 17 open issues and last shipped 2 days ago. operating-system leads on adoption by 365% (7,634 vs 1,643 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 2 topic tags (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 | ★ 7.6K | ★ 1.6K |
| License | Apache-2.0 | MIT |
| Written in | Python | Python |
| Last push | 2026-11-06 | 2026-11-07 |
| Forks | ⑂ 1.3K | ⑂ 442 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick operating-system if
- You weight community size — 7.6K 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
Home Assistant Operating System Home Assistant Operating System (formerly HassOS) is a Linux based operating system optimized to host Home Assistant and its Apps. Home Assistant Operating System uses Docker as its container engine. By default it deploys the Home Assistant Supervisor as a container. Home Assistant Supervisor in turn uses the Docker container engine to control Home Assistant Core and Apps in separate containers. Home Assistant Operating System is not based on a regular Linux distribution like Ubuntu. It is built using Buildroot and it is optimized to run Home Assistant. It targets single board…
read the full operating-system 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
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Frequently asked questions
Is operating-system or homeassistant-powercalc more popular?
operating-system has 7,634 GitHub stars and homeassistant-powercalc has 1,643. 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 (7,634 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.