More than 740 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 | yes |
| Harvard University | yes |
| Haverford College | yes |
| Health Sciences Federal University of Porto Alegre | |
| Hellenic Centre for Marine Research | yes |
| Hellenic Parliamentary Library | yes |
| Hellenic Pasteur Institute | yes |
| Heriot-Watt University | |
| Hope College | |
| City University of New York, Office of Library Services | |
| Hunter College | yes |