Additive technologies have begun its development and application since the second half of the 1980s. The main reason behind that was to fulfil the market demands of increased product quality, flexibility, lower costs, shorter development time and production, as well as small series and individual production. As part of additive technologies, low-budget 3D printers have been developed and are widely available now, and also allow a significant expansion of the application of additive technologies for development and production. A large number of low-budget 3D printers on the market make it difficult for the potential investor to choose from. The working principle of low-budget 3D printers, their construction, materials that they can process and the errors and problems of their technology, were all explained and described to understand further comparisons. The most common and popular low-budget 3D printers were described along with their features for mutual comparison. Two of them, the MakerBot Replicator 2X and Ultimaker Original, were chosen due to their availability for a detailed comparison. Their performances in making the referent prototypes were also compared through conducted measurements. MakerBot Replicator 2X gave better results and was chosen as a better 3D printer while the offered approach gives an example on what to pay attention when buying a low-budget 3D printer.