Onyx Security vs Notabene
Side-by-side comparison of AI visibility scores, market position, and capabilities
Israeli AI agent security startup protecting enterprise AI agent deployments from prompt injection and model compromise. $40M raised (March 2026); Fortune 500 customers; founded 2024; addresses the emerging AI agent attack surface.
About
Onyx Security is an Israeli AI agent security startup founded in 2024 to address the emerging attack surface created by enterprise AI agent deployments. As organizations deploy autonomous AI agents that can take actions, access data, and interact with external services, Onyx identified a critical security gap: existing enterprise security tools were built for human users and traditional software, not for AI agents that operate autonomously and can be manipulated through prompt injection, model compromise, or tool misuse. Onyx was founded to build the security infrastructure layer that makes enterprise AI agents safe to deploy at scale.\n\nOnyx's platform monitors, governs, and protects enterprise AI agent deployments in real time — detecting anomalous agent behavior, enforcing least-privilege access policies, preventing prompt injection attacks, and providing audit trails for agent actions. The product is designed for Fortune 500 enterprises deploying AI agents in business-critical workflows where a compromised or misbehaving agent could exfiltrate data, take unauthorized actions, or cause operational harm. Onyx integrates with leading agentic AI platforms and enterprise security infrastructure without requiring architectural changes to existing agent deployments.\n\nOnyx Security raised $40 million in March 2026 and counts Fortune 500 companies among its early customers — a remarkable milestone for a company less than two years old. The funding and customer traction validate both the urgency of the AI agent security problem and Onyx's technical approach. The company is positioned to lead the AI agent security category as enterprise agentic deployments accelerate globally and CISOs begin to demand purpose-built security controls for AI systems operating in production environments.
Crypto Travel Rule compliance platform connecting 165+ VASPs globally for KYC data sharing across 80+ jurisdictions; $27.1M with DRW Trading Series B processing $500B+ transactions preventing $1B+ high-risk.
About
Notabene is a Brooklyn-based cryptocurrency compliance platform that helps crypto exchanges, financial institutions, and virtual asset service providers (VASPs) meet Travel Rule requirements across 80+ jurisdictions — providing the infrastructure for compliant transfer of customer identification information between crypto businesses when transactions exceed regulatory thresholds (typically $1,000+ in the US, $1,000 EUR in Europe). Founded in 2019 and backed by Y Combinator with $27.1 million raised including a $14.5 million Series B led by DRW Trading Group in November 2024, Notabene serves 165+ companies globally, processing $500 billion+ in transactions annually while preventing $1 billion+ in high-risk transactions in 2024.
AI Visibility Head-to-Head
Key Details
Capabilities & Ecosystem
Capabilities
Integrations
Also Compare
Track AI Visibility in Real Time
Monitor how your brand performs across ChatGPT, Gemini, Perplexity, Claude, and Grok daily.