Paying for licences is usually not cheap and can significantly affect the budget of a non-profit organisation. Luckily there are options to get discounted software licences or even free access to paid services:

• TechSoup: This is an organisation that provides a wide catalogue of licensed software, from office suites to antivirus products, available to non-profit organisations for a discounted price. Registering with a regional TechSoup representative is required but it is not hard to get.
• Proton for Business: Proton’s encrypted email solution is available at special pricing for non-profits.
• Project Galileo: Cloudflare’s initiative for public interest actors (civil society, journalists, human rights activists...) provides them with DDoS website protection and other paid options free of charge.