If you buy through our links, we may earn money from affiliate partners. Learn more. Alyssa Powell/Business Insider You can watch HBO on Hulu with the HBO Max add-on for an additional $15 a month.The add-on gives you access to HBO's entire catalog of shows and movies directly through Hulu.You also get access to HBO Max content through the HBO Max app.Monthly Subscription (small)Streaming Service (small)For years, HBO has been one of the most popular premium channels to add to your cable subscription.