Multi-year Heavy Threema User here. They just made it fully open source. Which I greatly appreciate. And though this comparison by them might be little biased

Multi-year Heavy Threema User here. They just made it fully open source. Which I greatly appreciate. And though this comparison by them might be little biased I found it interesting especially with regards to Signal: https://threema.ch/en/messenger-comparison https://threema.ch/en/messenger-comparison