Cisco Umbrella

DNSFilter

DNSFilter blocks malicious domains, phishing sites, ransomware, and unwanted content at the DNS layer before a device can connect, using an AI model the company says catches newly registered and weaponized domains up to 10 days ahead of third-party threat feeds. It serves enterprises, MSPs and MSSPs (with a multi-tenant dashboard used by over 6,000 partners), schools, healthcare, finance, hospitality, and government customers. Beyond blocking, features like AppAware allow one-click blocking of risky applications, CyberSight adds user behavior analytics to spot shadow IT, and a global anycast network keeps DNS resolution fast. It deploys without on-site hardware, includes DNSSEC validation, and is priced per license with volume-based rates that drop as license count grows.

Control D

Control D is a DNS filtering and security service that blocks malware, unwanted content, and specific applications across devices at the DNS level. It runs on a claimed 100M-user threat intelligence network with a reported 99.98% malware block rate, and supports modern encrypted DNS protocols including DNS-over-HTTPS, DNS-over-TLS, and DNS-over-QUIC.

Zscaler Internet Access

Zscaler Internet Access (ZIA) is a cloud‑native secure web gateway that protects users from threats on the internet and SaaS applications. It inspects traffic inline, enforces policy, and leverages AI to block malware, ransomware, and data loss. Delivered as a global SaaS service, ZIA scales instantly, requires no on‑prem hardware, and integrates with identity providers and CASB solutions to give organizations consistent security regardless of location or device.

Cloudflare

Cloudflare is a global network providing CDN, DDoS protection, DNS, and a growing edge-computing platform (Workers, Pages, R2). It sits in front of a large share of the web to speed up and secure sites.