In general, other networks such as LoRa and Sigfox are also still in their build-up. NB-IoT has the advantage of being able to use existing LTE base stations, which will allow for sufficiently dense network with good indoor penetration, especially in urban regions.
Deutsche Telekom is confident that NB-IoT is a very high-quality product offering based on an 3GPP industry standard. While there will also be suitable usage scenarios for other LPWA technologies, we think that many IoT applications can be better implemented with NB-IoT (due to its superior performance) than with Sigfox or LoRa.