The following table lists some of the customers who licensed FlexGantt or its predecessor framework DJT.
| Customer | Notes |
|---|---|
| 3esi | |
| Actenum | |
| Adaptivity Inc. | |
| AeroInfo Systems Inc. | |
| Alcatel Space Industries | |
| Alcatrel | |
| AlphaTec | |
| Augeo | |
| Australien Department of Defence | |
| BAE Systems | |
| Benke Instrument & Elektro GmbH. | |
| blueScreen GmbH | |
| Boeing |  |
| British Telecom | |
| BTG Inc. | |
| CALEB Technologies Corp. | |
| Camelot IS-2 | |
| Cap Gemini Ernst & Young | |
| Carl Bro IT & Telecommunication | |
| Carnegie Mellon University | |
| Charles River Analytics | |
| Chiron | |
| Cimarron Software | |
| Command & Control Tech | |
| Computer Guidance Corp. | |
| Comtek AG | |
| Cosine Consultants LTD | |
| Courbon | |
| Demantra Inc. | |
| EF Technologies | |
| EHP Informatik GmbH | |
| Engineering Design Centre University of Cambridge | |
| Epicron Inc. | |
| e-Switch Solutions | |
| Evolve Information Technology | |
| Factory Logic Software | |
| Gebit Solutions GmbH | |
| General Dynamics | |
| Global Info Tek Inc | |
| Haller & Haller OEG | |
| ICA GmbH | |
| ifax | |
| Invidex | |
| Jet Propulsion Laboratory | |
| Jonova Inc. | |
| KAB Laboratories Inc. | |
| KMITBN | |
| Kovisoft | |
| Lindner & Walter Software GmbH | |
| Lockheed Martin | |
| Logical System s.r.l. | |
| Logistics & Internet Systems Ltd. | |
| Los Alamos National Laboratory | |
| Lyseis Ltd. AITS | |
| Macdonald Dettwiler | |
| Manor AG | |
| Marin Research Inc. | |
| McDonnel Douglas Corp. | |
| MDA | |
| Meta-1 | |
| Metron Inc. | |
| Mint Media Interactive | |
| MTF Impulse GmbH | |
| N(i)2 | |
| NASA | |
| NexPrise Inc. | |
| Nortel Networks | |
| OBBISOFT | |
| Optrak | |
| PC Market Group Inc. | |
| PointServe | |
| Ponte Software & Consulting GmbH | |
| Preston Group PL | |
| Profactor | |
| QUALIAC INFERENCE | |
| Raytheon | |
| RL Phillips Consulting Inc. | |
| Ropardo AG | |
| RSS Solutions | |
| s4m | |
| SAIC | |
| SciSys Ltd | |
| SharedPlan | |
| Shine Corporate Services | |
| Siemens | |
| Siemens Health Systems | |
| SMEA | |
| SPAWAR SYS CTR | |
| SPAWAR Systems Center San Diego | |
| SPAWARSYSCEN San Diego | |
| SPEA Airport Systems S.r.l. | |
| SUN VALLEY FOODS LTD | |
| SyncTec | |
| Sysline Inc. | |
| Technodyne | |
| Teknowledge Corporation | |
| The Distillery | |
| Titan | |
| UBB | |
| Unilog IT Services | |
| Universal Village Corp | |
| University of Limerick | |
| University of Minnesota | |
| University of Oldenburg | |
| University of Ulster | |
| Xtec SA | |
| XTRA On-Line | |
| ZealCore | |
| Last updated in May 2011 | |
