Debugging is an integral, yet time-consuming and cognitively demanding part of software development. While common debugging tools allow for a detailed inspection of current variable values, they do not offer a clear visualization of their evolution over time. When comparing states at different execution points, they rely on the programmer’s memory or auxiliary console outputs. In this paper, we present Diffpoints, a novel debugging tool that introduces new types of breakpoints to enable the automatic capture and comparison of variable states between multiple points of program execution. Two distinct types, namely line and group diffpoints, are supported, and to match variables from different stack traces, a heuristic is used. Diffpoints are implemented as an extension for the IntelliJ IDEA development environment. We conducted a preliminary user study and plan further evaluation.