Arcjet vs Contrast Runtime Security Platform: Side-by-Side Comparison (2026)

Short answer

Developers building APIs and web services need bot and rate-limit protection that doesn't require security expertise to deploy, and Arcjet's SDK-first approach means you configure rules in code rather than wrestling with WAF consoles. The WebAssembly-based local execution runs decisions at the edge without sending traffic to external services, cutting latency and keeping you compliant with data residency constraints. Skip this if your primary concern is legacy OWASP Top 10 coverage on existing monolithic applications; Arcjet is built for modern application stacks, not retrofitting old infrastructure. DevSecOps teams at mid-market and enterprise companies will get the most from Contrast Runtime Security Platform because it catches vulnerabilities and active attacks simultaneously during development and production, not just at gates. The platform covers five NIST CSF 2.0 functions including continuous monitoring and adverse event analysis, with runtime instrumentation that provides context most static testing tools miss. Skip this if your organization needs supply chain scanning as a primary function; Contrast treats that as visibility only, not as its core enforcement mechanism.

Based on our analysis of core features, company size fit, deployment model, here is our conclusion: