Partial list of Clients Elys has served:
| Boeing | Pacific Telephone |
| Bonneville Power | PetroCanada |
| British Telecom | QVC Shopping Network |
| Columbia Records | Rogers Cable, Canada |
| City of Seattle | RomTelecom, Romania |
| Fingerhut | Sprint |
| First USA | Standard Insurance |
| Hilo Medical Center | T-Mobile |
| Kaiser Permanente | Tacoma Public Utilities |
| Microsoft | Texaco |
| Multicare | United Health Care |
| Ocean Spray | Wells Fargo |