Obsidian Security has secured an $85 million Series D funding round, reaching a $1.1 billion post-money valuation. The round was led by Crescent Cove Advisors, with participation from Greylock Partners and Menlo Ventures. This funding will fuel expansion in research and development and go-to-market strategies, driven by the company's growth, including over 14 customers exceeding $1 million in annual revenue and more than 100 customers over $100,000 annually.