SonicWall

SonicWall is a massive, highly ubiquitous, and deeply established titan of the "Small-to-Medium Business (SMB) and Distributed Enterprise" firewall market. If you walk into a 200-person law firm, a regional accounting office, or a local high school, there is a very high probability you will find a SonicWall TZ or NSa series firewall sitting in their server rack. The absolute core superpower of SonicWall is its "SMB Accessibility and Deep Packet Inspection (RFDPI)." Historically, NGFW features were too expensive for small businesses. SonicWall democratized deep security. Their Reassembly-Free Deep Packet Inspection engine allows a relatively inexpensive firewall to actively scan every single byte of traffic for malware and ransomware without crippling the small business's internet speed. Furthermore, SonicWall is heavily favored by Managed Service Providers (MSPs). An outsourced IT company can use the SonicWall Capture Security Center to manage the firewalls of 50 different small business clients from a single, cloud-based dashboard. Because it offers a stunning balance of enterprise-grade security features (like the Capture ATP sandbox) at a price point small businesses can actually afford, it completely dominates the mid-market.