This study compares the application of probing techniques in cognitive interviewing (CI) and online probing (OP). Even though the probing is similar, the methods differ regarding typical mode setting, sample size, level of interactivity, and goals. We analyzed probing answers to the International Social Survey Programme item battery on specific national pride. While probing answers in CI show indications for a higher response quality, OP can compensate through a larger sample size. Therefore, both methods have complementary strengths with regard to error detection and themes.