head to head · open source
oomwoo vs homeassistant-powercalc
oomwoo has 13,009 GitHub stars, 817 forks, 3 open issues and last shipped 4 days ago. homeassistant-powercalc has 1,643 stars, 442 forks, 17 open issues and last shipped 2 days ago. oomwoo leads on adoption by 692% (13,009 vs 1,643 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 | ★ 13K | ★ 1.6K |
| License | Apache-2.0 | MIT |
| Written in | Python | Python |
| Last push | 2026-11-05 | 2026-11-07 |
| Forks | ⑂ 817 | ⑂ 442 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick oomwoo if
- You weight community size — 13K 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 Open source robot vacuum you build yourself Clean well · Hackable · Raspberry Pi · 3D printed · Local / No cloud required · Home Assistant · Arduino · ROS2 · ESP32 OOMWOO is an open source home robot vacuum you can build yourself, built using Raspberry Pi, 3D printing, Home Assistant, Arduino and ROS2. It uses an affordable 2D LiDAR to map your home and navigate on its own. Local, no cloud required for regular functionality, no vendor lock in. Follow us building in public Discord X Instagram Facebook Reddit newsletter YouTube oomwoo.com Tutorials Early build instructions will be available in Fall 2026…
read the full oomwoo 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 →
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Frequently asked questions
Is oomwoo or homeassistant-powercalc more popular?
oomwoo has 13,009 GitHub stars and homeassistant-powercalc has 1,643. 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 (13,009 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.