What are some alternatives?
When comparing Noise Blocker and SoliCall Pro, you can also consider the following products
Krisp - Mute the background noise during your calls
NVIDIA RTX Voice - NVIDIA RTX Voice is a new plugin that leverages NVIDIA RTX GPUs and their AI capabilities to remove distracting background noise from your broadcasts, voice chats, and remote video conferencing meetings.
NoiseGator - A simple noise gate app intended for use with VOIPs like Skype.
NoiseTorch - NoiseTorch is an open source app for Linux with PulseAudio. It creates a virtual microphone that suppresses noise. Use any conferencing or VOIP app you like and simply select the NoiseTorch Virtual Microphone as input to remove unwanted noise.
DeepSkyStacker - DeepSkyStacker is a freeware for astrophotographers that simplifies all the pre-processing steps of...
PixInsight - A powerful deep sky stacking application for astrophotography.