There are sites that offer links or coupon codes for Ninja products including Groupon.com, Coupons.com and RetailMeNot.com. These sites do not guarantee that the coupons will work when used on the Ninja site, however. Most of the options on these sites are links to the sales taking place directly on the Ninja website.
The offerings on these types of websites can change daily. If a coupon site does not have any offerings for Ninja at the moment, checking back the next day or signing up for alerts can be useful to notify users when new offers are up. Coupons.com often offers sale listings that link directly to the Ninja website. These offerings, in addition to the coupons, can change as the Ninja company changes its sales.
RetailMeNot.com offers a few coupon codes, but they do not always work. Each coupon and offering has a success rate. This may not be accurate if not all users of the site click on the correct rating for the coupon. Customers can check the codes by processing their order on the Ninja website and then entering the code given into the coupon box. The discount will be visible once the code is accepted. Customers are also given access to sign up for alerts and discounts directly from the Ninja site as part of the RetailMeNot.com offers.