Most fruits are not the best fit for a strict keto diet. Berries are the exception!
Berries are low in carbs and high in fiber.
In fact, raspberries and blackberries contain as much fiber as digestible carbs.
These tiny fruits are loaded with antioxidants that have been credited with reducing inflammation and protecting against disease
Here are the carb counts for 3.5 ounces (100 grams) of some berries
Blackberries: 5 grams net carbs (10 grams total carbs)
Blueberries: 12 grams net carbs (14 grams total carbs)
Raspberries: 6 grams net carbs (12 grams total carbs)
Strawberries: 6 grams net carbs (8 grams total carbs)
Bottom line, berries can be consumed on a keto diet if you feel it's right for you! As with all foods I encourage moderation and also personal discretion. Some may find having berries "triggers" sweet cravings, then it is best to omit this from your diet until you are mentally ready to consume them.