- Honeywell International
- Hotel Neben Limited
- HR Aid Consults
- HRbreakoutRoom
- Ibiyemie Charity Foundation
- ICS Outsourcing Nigeria Limited
- Ikeja Electricity Distribution Company (IKEDC)
- ILOT - Lucky9ja
- Imose Technologies Limited
- ImpactHER
- InCorporateHR Limited
- Incsub Nigeria
- Infobip Nigeria
- Infravision Limited
- Inguest Global Partners Limited
- Inner Galaxy Steel Company Limited
- Institute of the Willing and Able (IOWAA)
- Intecil Group
- Integrated Dairies Limited
- Intelligent Innovations Co.
- International Alert
- International Institute of Tropical Agriculture (IITA)
- International Medical Corps (IMC)
- Interra Networks Limited
- Interswitch Group