Blast Security is a Tel Aviv-based cybersecurity startup that offers a Preemptive Cloud Defense Platform, turning native cloud controls on AWS, Azure and GCP into preventive guardrails so that configuration changes are modeled, simulated and enforced before they create risk. It was founded by the team behind Solebit (acquired by Mimecast) and came out of stealth in November 2025 with a $10M seed round co-led by 10D and MizMaa Ventures.