482 libraries have chosen to include participation in Portico as one component of their digital preservation strategy. These early participants are designated Archive Founders, signified by an icon below.
| Libraries | Archive Founders |
|---|---|
| Union Theological Seminary and Presbyterian School of Christian Education | yes |
| United States Army Research Laboratory | yes |
| Universita degli Studi del Piemonte Orientale | yes |
| University of California Digital Library, on behalf of: | yes |
| Lawrence Livermore National Laboratory | |
| University of California, Berkley | |
| University of California, Davis | |
| University of Canterbury | yes |
| University of Central Florida | yes |