The following ILSes are currently integrated with SimplyE, although there might be differences among versions:
- Book Systems Atriuum - SIP
- Auto-Graphics VERSO - SIP
- Biblionix Apollo - SIP
- Book Systems Atriuum - SIP
- Evergreen - SIP
- Koha - SIP
- III Sierra - SIP, patron API
- III Polaris - SIP, minimally:
- Version: 5.1.261
- Version: 5.2.199
- Version; 5.0R0 Build 191
- TLC CARLX - SIP
- SirsiDynix 3.5.2
- SirsiDynix 2017-06-05 3.5.2.1.1079
- SirsiDynix Symphony - 3.5.3 SIP
- SirsiDynix Horizon - SIP