| Price from | $0.60/mo | $10/mo |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | — |
| Plans published | 6 | 16 |
| Spec score · Residential Proxy Services | 9.0 (#6) | 8.1 (#34) |
| Free plan | No | No |
| Integrations | KnoxProxy lists more than 81 copy-paste integration guides across nine categories. | PreProx says standard HTTP(S) or SOCKS5 credentials work with compatible browsers, development libraries, automation tools, and data collection software; it names Chrome, Firefox, Python, Node.js, PHP, cURL, Selenium, Puppeteer, Octoparse, n8n, GoLogin, and BitBrowser. |
| Product | KnoxProxy provides residential, mobile, ISP, and datacenter proxy networks for developers and data teams collecting public data at scale. | PreProx LLC operates a platform offering residential proxy data, 24-hour mobile and WiFi proxy leases, SMS verification, rental numbers, and IP diagnostic tools. |
| Proxy types | Products include residential, ISP, mobile, datacenter, rotating, dedicated and IPv6 proxies. | residential |
| Support | Support is advertised as 24/7 with a four-minute median first reply. | PreProx lists email and contact-form support, typically responding within one business day, with business-day support availability. |
