More than 720 libraries around the world have chosen to include participation in Portico as one important component of their digital preservation strategy. Early participants are designated Archive Founders and are identified as such in the lists below.
| Libraries | Archive Founders |
|---|---|
| Hampshire College | yes |
| Harokopio University of Athens | yes |
| Harvard University | yes |
| Haverford College | yes |
| Hellenic Centre for Marine Research | yes |
| Hellenic Open University | yes |
| Hellenic Parliamentary Library | yes |
| Hellenic Pasteur Institute | yes |
| Heriot Watt University | |
| Hope College |