This dataset represents version 1.0 of the RAAC Similarity Tool, developed during a C-DICE industrial secondment in collaboration with the University of Birmingham, Imfuna Ltd, and Loughborough University. Funded by C-DICE and Imfuna Ltd, the tool enables browser-based analysis of RAAC panel similarities using interactive charts and local data processing. Designed for internal research and limited commercial use, it features a responsive interface, real-time analysis, and password-protected access. This version reflects the private GitHub repository at the time of deposit and serves as the official reference for reproducibility. Future updates may continue on GitHub under the project lead’s management.