| Immunochem S.r.l. | |
| Impuls Communicatie B.V. | |
| IMPULS Computer Systems | Brussels-Capital |
| Imtech Belgium N.V. | |
| In ONE | Flemish Brabant |
| In The Pocket | |
| in2it | Antwerp |
| Incize | |
| Incres | Antwerp |
| Incrius | East Flanders |
| Indie Group | West Flanders |
| Industrya | |
| Infinity Mobile N.V. | |
| Influo N.V. | |
| Infor-Conseils | Hainaut |
| Inforef A.S.B.L. | Liège |
| Informate International N.V./S.A. | Limburg |
| Informex | |
| Infotek | Luxembourg |
| InhaTarget Therapeutics S.R.L. | |
| Inlecom | Brussels-Capital |
| Inloc S.A. | Walloon Brabant |
| Inmanta N.V. | |
| InnoSer | |
| Innosolutions | |
| Innovation Sprint | |
| Innovedia.be | Limburg |
| Innoviris | |
| Inoopa S.A. | |
| Institut belge des services postaux et des télécommunications | |
| Institut des Arts de Diffusion | |
| Instituts Saint-Luc - Bruxelles | |
| INTEGR8 | Flemish Brabant |
| Integral Software S.A. | Hainaut |
| InteGreat N.V. | West Flanders |
| Intelliga S.A. | Brussels-Capital |
| Intellinet | |
| Intellisol N.V. | |
| Inter-University Institute For High Energies | |
| Interbyte | East Flanders |
| Interhost Solutions | Antwerp |
| Interlinea | East Flanders |
| Interlinie Webdesign | Antwerp |
| Internal Consulting Services | |
| International Council for Advertising Self-Regulation | |
| International Software Company | Walloon Brabant |
| Internet of Things Council | East Flanders |
| Internet Society Belgium | East Flanders |
| InternetVista S.A/N.V. | Walloon Brabant |
| Interparking Group S.A. | |