| UniConsent | 1 | 1 |
| UniFi | 2 | 2 |
| Unica | 1 | 3 |
| Unicenter | 10 | 15 |
| Unichat | 1 | 1 |
| Unicode | 2 | 24 |
| Unicon-imc2 | 1 | 1 |
| Unicon-software | 2 | 2 |
| Unicore | 1 | 1 |
| Unicorn-engine | 1 | 7 |
| Unicreditgroup | 1 | 1 |
| Unicycle Project | 1 | 1 |
| Uniden | 1 | 1 |
| Unidomedia | 1 | 1 |
| Unified Automation | 1 | 2 |
| Unified Intents AB | 1 | 1 |
| Unified-automation | 1 | 1 |
| Unifiedoffice | 1 | 1 |
| Uniformserver | 1 | 1 |
| Uniforum | 1 | 2 |
| Unify | 15 | 32 |
| Uniguest | 1 | 3 |
| Unijimpe | 1 | 4 |
| Uninet | 1 | 1 |
| Uninett | 2 | 9 |
| Unioncms Project | 1 | 1 |
| Unionpayintl | 1 | 3 |
| Uniqkey | 1 | 11 |
| Unique Ads | 1 | 1 |
| Unisharp | 2 | 2 |
| Unisign | 1 | 2 |
| Unisoc | 1 | 1 |
| Unisoc (Shanghai) Technologies Co., Ltd. | 38 | 552 |
| Unisoft | 1 | 2 |
| Unisoon | 1 | 3 |
| Unisor Cms | 1 | 1 |
| Unistra | 1 | 1 |
| Uniswap | 2 | 2 |
| Unisys | 15 | 25 |
| Unit4 | 5 | 14 |
| United-security-providers | 1 | 1 |
| Unitedecu | 1 | 1 |
| Unitedhawknation | 1 | 1 |
| Unitedplanet | 1 | 3 |
| Unitegallery | 1 | 3 |
| Unitree | 1 | 1 |
| Unitree Robotics | 1 | 2 |
| Unitrends | 2 | 13 |
| Unitronics | 3 | 6 |
| Unity | 2 | 8 |
| Unity3d | 1 | 2 |
| Univa | 1 | 6 |
| Univention | 2 | 2 |
| Univention Corporate Server | 1 | 1 |
| Univera Computer System | 1 | 2 |
| Universal Robots | 5 | 6 |
| Universal Robots A/S | 2 | 2 |
| Universal-Omega | 1 | 1 |
| Universal Ircd | 1 | 9 |
| Universal Office Converter Project | 1 | 1 |
| Universe | 1 | 1 |
| Universibo | 1 | 1 |
| Universis | 2 | 2 |
| Universitat Politècnica De València (UPV) | 1 | 1 |
| University Of Cambridge | 1 | 1 |
| University Of Central Florida | 1 | 1 |
| University College London | 1 | 1 |
| University Compass Project | 1 | 1 |
| University Of Arizona | 2 | 8 |
| University Of British Columbia | 1 | 1 |
| University Of California | 1 | 2 |
| University Of Cambridge | 1 | 62 |
| University Of Glasgow | 1 | 1 |
| University Of Kansas | 1 | 24 |
| University Of Massachusetts | 1 | 1 |
| University Of Minnesota | 3 | 30 |
| University Of Queensland | 1 | 1 |
| University Of Washington | 12 | 80 |
| Uniview | 4 | 8 |
| Uniway | 1 | 1 |
| Uniwill | 1 | 1 |
| Uniwin | 1 | 3 |
| Unix | 1 | 29 |
| Unixodbc | 1 | 4 |
| Unixware | 1 | 2 |
| Unknown | 2097 | 3750 |
| Unknown Domain | 1 | 9 |
| Unlcms | 1 | 2 |
| Unleashedmind | 1 | 2 |
| Unlimited Elements | 1 | 3 |
| Unolabo Project | 1 | 1 |
| Unraid | 1 | 2 |
| Unreal | 1 | 10 |
| Unrealircd | 1 | 10 |
| Unrtf Project | 1 | 4 |
| Unsanity | 1 | 1 |
| Unscripts | 1 | 1 |
| Unshield Project | 1 | 1 |
| Untangle | 2 | 5 |
| Untis | 1 | 2 |
