What are some alternatives?
When comparing Volunteer Developers and Betty Bot fighting Covid-19, you can also consider the following products
COVID-19 Flight Tool - Track the safety measures and rules at airlines & airports.
Software Donation - Donate tools to enable remote work during COVID-19 outbreak
Google's COVID-19 Information Portal - A search portal with safety tips and official stats
MineAMask - Donate spare CPU power to generate funds & fight COVID-19
Code Against COVID-19 - Connect with developers to get help for COVID-19 projects
CoronaWhy - Globally distributed, fully remote COVID-19 AI task-force