Activity-based protein profiling is a powerful tool to study target engagement in complex biological environments. XO44, ALX005 and ALX011 are chemical probes based on the scaffold of a promiscuous kinase binder, which covalently reacts with a conserved lysine in the ATP-binding pocket of kinases. Pretreatment of cells with a drug (candidate) results in competition of XO44/ALX005/ALX011 binding, which can be interpreted as in situ target engagement. Here CellEKT is presented, a workflow which is optimized for kinome coverage, reproducibility and data processing. This dataset contains the kinome coverage assessment of ALX005 and ALX011 in comparison to the kinome coverage of XO44 which was determined in the selectivity screening of Midostaurin (PXD035619, PXD035549)