A system for summary based privacy security for benchmarks including an interface and a processor. The interface is configured to receive an indication to opt-in to a benchmark category from a tenant, where opting-in includes a privacy level. The interface is also configured to provide a benchmark data request to a tenant system, where the benchmark data request includes a requirement to summarize tenant data for the benchmark data request compatible with the privacy level. The processor is configured to combine summarized tenant data with prior commingled benchmark data to update a commingled benchmark database, where the commingled benchmark database includes data from a plurality of tenants. The processor is also configured to determine a benchmark compatible with the privacy level using the commingled benchmark database.