DNSFilter vs OWASP Coraza WAF

DNSFilter provides protective DNS and content filtering for organizations managing threats and workplace internet use. It categorizes billions of domains with Webshrinker machine-learning categorization, while AppAware can block more than 100 risky applications. DNSFilter says its real-time threat categorization can identify threats 10 days faster than other threat feeds. Deployments include network configuration, a DNS relay, and roaming clients for Windows, macOS, iOS, Android, and Chrome. Listed controls include DNS encryption such as DNS-over-TLS, custom blocklists, safe search, filtering schedules, and advanced activity reports. Active Directory Sync Tool supports up to 500,000 users and applies policies by user or group. Integrations include Microsoft Entra, Active Directory, Zapier, API access, and an MCP Connector. Data Export supports Amazon S3 and Splunk, with Microsoft Sentinel also named. API access is included in all plans, with rate limits but no overall usage cap. Pricing starts at $1/mo (annual), with a 14-day trial and no free plan.

OWASP Coraza WAF is a free, open-source Web Application Firewall for APIs and web applications. It supports ModSecurity SecLang rulesets and is fully compatible with the OWASP Core Rule Set. That ruleset covers threats including SQL injection, cross-site scripting, code injection, HTTPoxy, Shellshock and scanner or bot activity. Coraza can run as a sidecar, proxy or library in Go, C++ and WebAssembly. Official connectors are listed for NGINX, Envoy, Caddy, Apache APISIX, proxy-wasm, HAProxy, Traefik and libcoraza. Documentation describes extension points for audit loggers, persistence engines, operators, actions and plugins, with examples for GeoIP and a package containing the Core Rule Set and recommended configuration. The Quick Start requires Go 1.24 or later. Platforms listed are API, Linux, macOS and self-hosted. Coraza offers managed rule sets, API protection and bot management. The v3 internals documentation says persistent collections such as IP, SESSION and RESOURCE are not currently supported. Coraza Playground provides a sandbox web interface for testing rules. The Open source plan is listed at free.