Levo Runtime Application Security vs Upstream Fusion API Security: Side-by-Side Comparison (2026)

Short answer

Teams building AI-native applications or maintaining sprawling API ecosystems should choose Levo Runtime Application Security because it actually discovers and monitors machine-to-machine traffic that traditional WAFs and API gateways miss. The eBPF-based collection works without agents, and the unified runtime graph connecting APIs, LLMs, and agents gives you visibility into attack surfaces that don't show up in your inventory tools. Skip this if your infrastructure is mostly monolithic, on-prem applications with minimal API footprint; you'll pay for capabilities you don't need. Mid-market and enterprise teams in automotive and transportation need Upstream Fusion API Security because it actually finds the APIs you've forgotten about, then stops attacks against them before your WAF or API gateway sees them. The ML-based behavioral detection covers OWASP API Top 10 threats while the digital twin gives you real transaction context that pure signature tools miss, and the agentic AI for automated response means you're not manually triaging every anomaly. Skip this if your APIs are mostly internal, static, and rarely change; the discovery and continuous monitoring overhead won't justify itself for simple architectures.