Many companies and users find RuuviTag interesting because it’s:
- Open-source hardware
- Open-source software
- Ready to be used in various business cases (not just a development tool)
- Built using high-quality components
If you’re looking for other open-source nRF52 based development boards, you might find Puck.js interesting:
If you are looking for non-open-source Bluetooth beacons, many are available.