Azure Web Application Firewall vs. Arcjet

Azure Web Application Firewall is a cloud-native security service designed to protect web applications and APIs from common web vulnerabilities and attacks, such as SQL injection and cross-site scripting. By integrating seamlessly with Azure services like Application Gateway, Front Door, and Content Delivery Network , Azure WAF offers centralized protection, ensuring the security and availability of web applications without the need for modifications to backend code.

Arcjet is runtime security for AI agents. It puts the decision where the action is: block prompt injection, stop PII leaks, block bots, and add guardrails to tools, APIs, and database calls. Identity tells you who is asking, but it cannot tell you what happens next. Arcjet runs inside the code that takes the action, so every agent action is observed in the run it belongs to, checked before it executes, and kept as evidence afterwards. Each check returns a decision your code acts on: allow, block, redact, or hold for review.