Natural gas hydrates are crystalline solids composed of water molecules and light hydrocarbons. The most favorable conditions for the formation of hydrates are high pressure and low temperature. The accumulation of hydrates is a significant problem for the oil industry, as it can result in blockages in the transportation and production lines, or hamper the drilling of wells. Thus, it is imperative to avoid the formation of hydrates. Different techniques have been developed and improved over the years seeking to prevent hydrates formation. The present paper aims to review the literature with the goal of gathering information on the main techniques used to prevent the formation of hydrates. This study also highlights the technological advancement of the main prevention techniques, considering that those techniques use chemicals or heat transfer to prevent or delay the formation of hydrates.