Yes, pistachios are compliant with the Whole30 diet plan. This diet emphasizes whole foods and eliminates sugar, alcohol, grains, legumes, soy, and dairy. Pistachios, being all-natural and unprocessed, fit into this plan perfectly. However, participants at Whole30 will need to ensure that they are consuming pistachios dry roasted and without added salt, sugar, or other non-compliant additives.