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 |
|---|---|
| Kansas State University | yes |
| Kansas State University at Salina | yes |
| Karolinska Institute | yes |
| Keele University | |
| Keene State College | yes |
| Kennesaw State University | |
| King's College, London | yes |