| Business | Phone |
| Weber Shandwick 101 Main St # 8, Cambridge 2142 | (617) 661-7900 |
| Advise & Consult 33 Washington Ave # 6, Cambridge 2140 | (617) 497-2127 |
| Feinstein Kean Healthcare 245 1st St # 14, Cambridge 2142 | (617) 577-8110 |
| Braithwaite & Katz Comm 2400 Massachusetts Ave # 2, Cambridge 2140 | (617) 259-9600 |
| Mills & Co 799 Cambridge St, Cambridge 2141 | (617) 354-0300 |
| Media Mentor 29 Cogswell Ave, Cambridge 2140 | (617) 492-0442 |
| Saragoni & Co 7 Mercer Cir, Cambridge 2138 | (617) 695-9200 |
| Civetta Comunicazioni 90 Hamilton St, Cambridge 2139 | (617) 577-8098 |
| Patti Jacobs Public Relations 4 Brattle St, Cambridge 2138 | (617) 868-0077 |
| Lynch Sanborn Group 56 Creighton St, Cambridge 2140 | (617) 737-7887 |
| Harris Communications 114 Mt Auburn St, Cambridge 2138 | (617) 576-0906 |
| Lns Communications 245 1st St, Cambridge 2142 | (617) 577-9888 |
| Laz Public Relations 5 Upland Rd, Cambridge 2140 | (617) 661-0900 |