head to head · open source
oomwoo vs homeassistant-powercalc
oomwoo has 11,130 GitHub stars, 696 forks, 3 open issues and last shipped 4 days ago. homeassistant-powercalc has 1,583 stars, 423 forks, 17 open issues and last shipped 2 days ago. oomwoo leads on adoption by 603% (11,130 vs 1,583 stars). oomwoo is written in Python under Apache-2.0; homeassistant-powercalc is written in Python under MIT. oomwoo has attracted 6% 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 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
| oomwoo | homeassistant-powercalc | |
|---|---|---|
| GitHub stars | ★ 11K | ★ 1.6K |
| License | Apache-2.0 | MIT |
| Written in | Python | Python |
| Last push | 2026-09-21 | 2026-09-23 |
| Forks | ⑂ 696 | ⑂ 423 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick oomwoo if
- You weight community size — 11K 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 oomwoo
OOMWOO is an open source robot vacuum cleaner that you build yourself from a Raspberry Pi CM4 or CM5, 3D printed parts, Arduino and ESP32 electronics, and ROS2 software, aimed at makers and Home Assistant users who want a local, cloud free cleaning robot they can hack, repair, and extend.
read the full oomwoo 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 oomwoo or homeassistant-powercalc more popular?
oomwoo has 11,130 GitHub stars and homeassistant-powercalc has 1,583. oomwoo has the larger community by that measure.
Are oomwoo and homeassistant-powercalc free?
Both are open source. oomwoo is licensed under Apache-2.0 and homeassistant-powercalc under MIT. Neither carries a licence fee.
What is the difference between oomwoo and homeassistant-powercalc?
oomwoo 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, oomwoo or homeassistant-powercalc?
Choose oomwoo if you want the larger community (11,130 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.