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Who is Arcjet?
Arcjet is a private company that provides a security platform for web applications and APIs, delivering bot detection, rate limiting, email validation, and web application firewall controls through software libraries that run within application code.
- Bot detection and automated traffic classification
- Rate limiting and abuse prevention for APIs and web endpoints
- Web application firewall controls for application-layer threats
- Email validation and sign-up fraud prevention
- Software development kits for common application frameworks
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More About Arcjet
Arcjet is positioned for development teams that want security controls implemented close to application logic rather than only at the network perimeter. Its offerings are deployed by integrating a software development kit into an application, where request decisions are made with context from the application, such as user identity, route, and request metadata. The application then determines the response based on those decisions.
The platform is associated with several established technologies and concepts. Bot management and web application firewall functions address application-layer threats, while rate limiting addresses request volume and API abuse. Email validation addresses fraudulent or disposable address registration in sign-up flows. Integration works through standard HTTP request handling within common web frameworks.
The offerings overlap with web application and API protection services, which typically operate as reverse proxies or cloud edge services placed in front of applications, and with application-level libraries for rate limiting and bot detection. Edge-based services apply policy at the network boundary, while the Arcjet model places policy in application code, which allows rules to be defined per route and per user. This comparison reflects general design differences between the two approaches.
For organizations, application-level controls can reduce abuse of authentication endpoints, scraping, and automated account creation. Because the rules are defined in the same codebase used for product development, security configuration can be reviewed, versioned, and deployed alongside application changes. This allows engineering and security teams to work from a shared set of rules and decision records.
Arcjet is listed in the Information Technology category under cybersecurity, within network security and web application and API protection (WAAP). Its active solution areas include bot protection, rate limiting, web application firewall capabilities, and email validation for application developers. The company operates as a private company.
Our description of Arcjet. Updated October 2026.