SIG Insurance Services is an independent insurancy agency that offers auto, home, commercial, life, and other insurance coverage. Call (903) 927-1440 today for more information! Then why do so many insurance companies force your life to fit their policies? At SIG Insurance Services, we are an independent insurance agency, which means we don’t pigeonhole our customers by trying to make their needs fit into one company’s set of packages/services. Our clients have a choice of products from more than one insurance company. Insurance is a product that you can buy. If you typically shop at one store but you find a great sale at another, you DO have the freedom to take advantage of that particular sale, right?