Opensource to help increase organizations Cybersecurity posture

Cybersecurity is a compulsory, tough and expensive task for all organizations, private and public, large , medium and small.
No one can ignore it anymore, and building a viable Cybersecurity strategy is a complex task that needs to balance budget, keeping up with attacker technologies, available skills and a plethora of expensive tools on the market.
Let’s discus s on how available Opensource solutions may greatly help ours organizations to be more effective in implementing their Cybersecurity posture, while optimizing available budget.