| Horizonte Corporation | Puebla |
| Hospedaje.mx | Mexico City |
| Hospedalia | Mexico City |
| Hospicio Coworking | Jalisco |
| Host-depot.com | Mexico City |
| Hosting Toluca | State of Mexico |
| Hostingmx.com | Nuevo León |
| Hostingpage | Baja California |
| HSBC México | |
| Htech | Mexico City |
| HTML KickStart | Yucatán |
| Hubmine | |
| Hum & Software, S.A. de C.V. | Nuevo León |
| Human Factor Soluciones Tecnológicas, S.A. de C.V. | |
| i-place | Nuevo León |
| IA Interactive | |
| IAB México | Mexico City |
| IAPE Universidad | |
| iBasto | Jalisco |
| Ibbox Consulting | Mexico City |
| Ibeoamerican University | |
| IBIX, S.A. de C.V. | Mexico City |
| IbizMexico | Jalisco |
| Icom Industrial Computer México | Mexico City |
| ICON Technology | Sonora |
| ICON University | |
| ICONOS Instituto de Investigación en Comunicación y Cultura | |
| Icorp | Nuevo León |
| Idea Internet | |
| Ideas Inteligentes Diseño y Desarrollo Web | |
| Ideatika.NET | Puebla |
| Ideen | |
| Identicom | Mexico City |
| IDI | Mexico City |
| Idiweb | Mexico City |
| iDric | Mexico City |
| IDS Comercial, S.A. de C.V. | Mexico City |
| IGES Universidad | |
| IGNIA | Mexico City |
| IJALTI | Jalisco |
| Ikarus Soluciones Internet y Sistemas | Mexico City |
| Iken | |
| Ikernet Informatika | Guerrero |
| IKITA | |
| iLab | Chihuahua |
| ILS Clinical Research | Mexico City |
| Imagen Virtual | Mexico City |
| Imaginanet | Mexico City |
| Imagn | Mexico City |
| iMeil | Mexico City |